update docs

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

en/application-dev/reference/apis/js-apis-system-battery.md

+# Battery Level
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.batteryInfo`](js-apis-battery-info.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import battery from '@system.battery';
+```
+
+
+## battery.getStatus
+
+getStatus(Object): void
+
+Obtains the current charging state and battery level.
+
+**System capability**: SystemCapability.PowerManager.BatteryManager.Core
+
+**Parameter**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called when the check result is obtained |
+| fail | Function | No | Called when the check result fails to be obtained |
+| complete | Function | No | Called when the execution is complete |
+
+The following value will be returned when the check result is obtained.
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| charging | boolean | Whether the battery is being charged |
+| level | number | Current battery level, which ranges from 0.00 to 1.00. |
+
+**Example**
+
+```
+export default {    
+  getStatus() {       
+    battery.getStatus({           
+      success: function(data) {               
+        console.log('success get battery level:' + data.level);           
+      },            
+      fail: function(data, code) {                
+        console.log('fail to get battery level code:' + code + ', data: ' + data);            
+      },        
+    });    
+  },
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-brightness.md

+# Screen Brightness
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.brightness`](js-apis-brightness.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import brightness from '@system.brightness';
+```
+
+
+## brightness.getValue
+
+getValue(Object): void
+
+Obtains the current screen brightness.
+
+**System capability**: SystemCapability.PowerManager.DisplayPowerManager
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called when the execution is successful. |
+| fail | Function | No | Called when the operation fails. |
+| complete | Function | No | Called when the execution is complete |
+
+The following values will be returned when the operation is successful.
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| value | number | Screen brightness, which ranges from 1 to 255. |
+
+**Example**
+
+```
+export default {    
+  getValue() {        
+    brightness.getValue({            
+      success: function(data){                
+        console.log('success get brightness value:' + data.value);            
+      },            
+      fail: function(data, code) {                
+        console.log('get brightness fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  },
+}
+```
+
+
+## brightness.setValue
+
+setValue(Object): void
+
+Sets the screen brightness.
+
+**System capability**: SystemCapability.PowerManager.DisplayPowerManager
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| value | number | Yes | Screen&nbsp;brightness.&nbsp;The&nbsp;value&nbsp;is&nbsp;an&nbsp;integer&nbsp;ranging&nbsp;from&nbsp;1&nbsp;to&nbsp;255.<br/>-&nbsp;If&nbsp;the&nbsp;value&nbsp;is&nbsp;less&nbsp;than&nbsp;or&nbsp;equal&nbsp;to&nbsp;**0**,&nbsp;value&nbsp;**1**&nbsp;will&nbsp;be&nbsp;used.<br/>-&nbsp;If&nbsp;the&nbsp;value&nbsp;is&nbsp;greater&nbsp;than&nbsp;**255**,&nbsp;value&nbsp;**255**&nbsp;will&nbsp;be&nbsp;used.<br/>-&nbsp;If&nbsp;the&nbsp;value&nbsp;contains&nbsp;decimals,&nbsp;the&nbsp;integral&nbsp;part&nbsp;of&nbsp;the&nbsp;value&nbsp;will&nbsp;be&nbsp;used.&nbsp;For&nbsp;example,&nbsp;if&nbsp;value&nbsp;**8.1**&nbsp;is&nbsp;set,&nbsp;value&nbsp;**8**&nbsp;will&nbsp;be&nbsp;used. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+**Example**
+
+```
+export default {    
+  setValue() {        
+    brightness.setValue({            
+      value: 100,            
+      success: function(){                
+        console.log('handling set brightness success.');            
+      },            
+      fail: function(data, code){                
+        console.log('handling set brightness value fail, code:' + code + ', data: ' + data);            
+      },        
+    });    
+  },
+}
+```
+
+
+## brightness.getMode
+
+getMode(Object): void
+
+Obtains the screen brightness adjustment mode.
+
+**System capability**: SystemCapability.PowerManager.DisplayPowerManager
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete |
+
+The following values will be returned when the operation is successful.
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| mode | number | The&nbsp;value&nbsp;can&nbsp;be&nbsp;**0**&nbsp;or&nbsp;**1**.<br/>-&nbsp;**0**:&nbsp;The&nbsp;screen&nbsp;brightness&nbsp;is&nbsp;manually&nbsp;adjusted.<br/>-&nbsp;**1**:&nbsp;The&nbsp;screen&nbsp;brightness&nbsp;is&nbsp;automatically&nbsp;adjusted. |
+
+**Example**
+
+```
+export default {    
+  getMode() {        
+    brightness.getMode({            
+      success: function(data){                
+        console.log('success get mode:' + data.mode);            
+      },            
+      fail: function(data, code){                
+        console.log('handling get mode fail, code:' + code + ', data: ' + data);            
+      },
+    });    
+  },
+}
+```
+
+
+## brightness.setMode
+
+setMode(Object): void
+
+Sets the screen brightness adjustment mode.
+
+**System capability**: SystemCapability.PowerManager.DisplayPowerManager
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| mode | number | Yes | The&nbsp;value&nbsp;can&nbsp;be&nbsp;**0**&nbsp;or&nbsp;**1**.<br/>-&nbsp;**0**:&nbsp;The&nbsp;screen&nbsp;brightness&nbsp;is&nbsp;manually&nbsp;adjusted.<br/>-&nbsp;**1**:&nbsp;The&nbsp;screen&nbsp;brightness&nbsp;is&nbsp;automatically&nbsp;adjusted. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+**Example**
+
+```
+export default {    
+  setMode() {        
+    brightness.setMode({            
+      mode: 1,            
+      success: function(){                
+      console.log('handling set mode success.');            
+    },            
+     fail: function(data, code){                
+       console.log('handling set mode fail, code:' + code + ', data: ' + data);            
+     },
+    });    
+  },
+}
+```
+
+
+## brightness.setKeepScreenOn
+
+setKeepScreenOn(Object): void
+
+Sets whether to always keep the screen on. Call this API in **onShow()**.
+
+**System capability**: SystemCapability.PowerManager.DisplayPowerManager
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| keepScreenOn | boolean | Yes | Whether&nbsp;to&nbsp;always&nbsp;keep&nbsp;the&nbsp;screen&nbsp;on |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+**Example**
+
+```
+export default {    
+  setKeepScreenOn() {        
+    brightness.setKeepScreenOn({            
+      keepScreenOn: true,            
+      success: function () {                
+        console.log('handling set keep screen on success.')            
+      },            
+      fail: function (data, code) {                
+        console.log('handling set keep screen on fail, code:' + code + ', data: ' + data);            
+      },        
+    });    
+  },
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-cipher.md

+# Encryption Algorithm
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+>
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+> - This API is defined but not implemented in OpenHarmony 3.1 Release. It will be available for use in OpenHarmony 3.1 MR.
+
+
+## Modules to Import
+
+
+```
+import cipher from '@system.cipher'
+```
+
+
+## cipher.rsa
+
+rsa(Object): void
+
+Encrypts or decrypts data using RSA.
+
+**System capability**: SystemCapability.Security.Cipher
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| action | string | Yes | Action&nbsp;type.&nbsp;The&nbsp;options&nbsp;are&nbsp;as&nbsp;follows:<br/>1.&nbsp;**encrypt**:&nbsp;Encrypts&nbsp;data.<br/>2.&nbsp;**decrypt**:&nbsp;Decrypts&nbsp;data. |
+| text | string | Yes | Text&nbsp;content&nbsp;to&nbsp;be&nbsp;encrypted&nbsp;or&nbsp;decrypted.&nbsp;The&nbsp;text&nbsp;to&nbsp;be&nbsp;encrypted&nbsp;must&nbsp;be&nbsp;a&nbsp;common&nbsp;text&nbsp;and&nbsp;cannot&nbsp;exceed&nbsp;the&nbsp;length&nbsp;calculated&nbsp;based&nbsp;on&nbsp;the&nbsp;formula&nbsp;(keySize/8&nbsp;-&nbsp;66).&nbsp;**keySize**&nbsp;indicates&nbsp;the&nbsp;key&nbsp;length.&nbsp;For&nbsp;example,&nbsp;if&nbsp;the&nbsp;key&nbsp;length&nbsp;is&nbsp;1024&nbsp;bytes,&nbsp;the&nbsp;text&nbsp;cannot&nbsp;exceed&nbsp;62&nbsp;bytes&nbsp;(1024/8&nbsp;-&nbsp;66&nbsp;=&nbsp;62).&nbsp;The&nbsp;text&nbsp;content&nbsp;to&nbsp;be&nbsp;decrypted&nbsp;must&nbsp;be&nbsp;a&nbsp;binary&nbsp;value&nbsp;encoded&nbsp;using&nbsp;Base64.&nbsp;The&nbsp;default&nbsp;format&nbsp;is&nbsp;used&nbsp;for&nbsp;Base64&nbsp;encoding. |
+| key | string | Yes | Keys&nbsp;encrypted&nbsp;using&nbsp;RSA.&nbsp;During&nbsp;encryption,&nbsp;this&nbsp;parameter&nbsp;is&nbsp;a&nbsp;public&nbsp;key.&nbsp;During&nbsp;decryption,&nbsp;it&nbsp;is&nbsp;a&nbsp;private&nbsp;key. |
+| transformation | string | No | RSA&nbsp;algorithm&nbsp;padding.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**RSA/None/OAEPWithSHA256AndMGF1Padding**. |
+| success | Function | No | Called&nbsp;when&nbsp;data&nbsp;is&nbsp;encrypted&nbsp;or&nbsp;decrypted&nbsp;successfully. |
+| fail | Function | No | Called&nbsp;when&nbsp;data&nbsp;fails&nbsp;to&nbsp;be&nbsp;encrypted&nbsp;or&nbsp;decrypted. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+**Example**
+
+```
+export default {    
+  rsa() {        
+    cipher.rsa({            
+  // Encrypt data.
+      action: 'encrypt',            
+  // Text content to be encrypted
+      text: 'hello',            
+  // Base64-encoded public key used for encryption
+      key:            
+        'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDc7GR2MrfAoefES+wrs1ns2afT\n' +            
+        'eJXSfIkEHfPXG9fVFjaws1ho4KcZfsxlA0+SXvc83f2SVGCuzULmM2lxxRCtcUN/\n' +            
+        'h7SoaYEeluhqFimL2AEjfSwINHCLqObJkcjCfoZpE1JCehPiDOJsyT50Auc08h/4\n' +            
+        'jHQfanyC1nc62LqUCQIDAQAB',            
+        success: function(data) {                
+          console.log('handling success: ${data.text}');            
+        },            
+        fail: function(data, code) {               
+          console.log(`### cipher.rsa encrypt fail ### ${code}: ${data}`);           
+        }       
+      });        
+      cipher.rsa({            
+  // Decrypt data.
+        action: 'decrypt',            
+  // The text to be decrypted is a Base64-encoded binary value, and the decrypted text is "hello".
+        text:            
+          'CUg3tTxTIdpCfreIxIBdws3uhd5qXLwcrVl3XDnQzZFVHyjVVCDHS16rjopaZ4C5xU2Tc8mSDzt7\n' +            
+          'gp9vBfSwi7bMtSUvXG18DlncsKJFDkJpS5t0PkpS9YrJXrY80Gpe+ME6+6dN9bjgqMljbitDdBRf\n' +            
+          'S/ZWNI4Q8Q0suNjNkGU=',            
+  // Base64-encoded public key used for encryption
+         key:            
+           'MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBANzsZHYyt8Ch58RL\n' +            
+           '7CuzWezZp9N4ldJ8iQQd89cb19UWNrCzWGjgpxl+zGUDT5Je9zzd/ZJUYK7NQuYz\n' +            
+           'aXHFEK1xQ3+HtKhpgR6W6GoWKYvYASN9LAg0cIuo5smRyMJ+hmkTUkJ6E+IM4mzJ\n' +            
+           'PnQC5zTyH/iMdB9qfILWdzrYupQJAgMBAAECgYEAkibhH0DWR13U0gvYJeD08Lfd\n' +            
+           'Sw1PMHyquEqIcho9Yv7bF3LOXjOg2EEGPx09mvuwXFgP1Kp1e67XPytr6pQQPzK7\n' +            
+           'XAPcLPx80R/ZjZs8vNFndDOd1HgD3vSVmYQarNzmKi72tOUWMPevsaFXPHo6Xx3X\n' +            
+           '8x0wYb7XuBsQguRctTECQQD7GWX3JUiyo562iVrpTDPOXsrUxmzCrgz2OZildxMd\n' +            
+           'Pp/PkyDrx7mEXTpk4K/XnQJ3GpJNi2iDSxDuPSAeJ/aPAkEA4Tw4+1Z43S/xH3C3\n' +            
+           'nfulYBNyB4si6KEUuC0krcC1pDJ21Gd12efKo5VF8SaJI1ZUQOzguV+dqNsB/JUY\n' +            
+           'OFfX5wJAB1dKv9r7MR3Peg6x9bggm5vx2h6i914XSuuMJupASM6X5X2rrLj+F3yS\n' +            
+           'RHi9K1SPyeOg+1tkBtKfABgRZFBOyQJAbuTivUSe73AqTKuHjB4ZF0ubqgEkJ9sf\n' +            
+           'Q2rekzm9dOFvxjZGPQo1qALX09qATMi1ZN376ukby8ZAnSafLSZ64wJBAM2V37go\n' +            
+           'Sj44HF76ksRow8gecuQm48NCTGAGTicXg8riKog2GC9y8pMNHAezoR9wXJF7kk+k\n' +            
+           'lz5cHyoMZ9mcd30=',            
+           success: function(data) {                
+             console.log('handling success: ${data.text}');            
+           },            
+           fail: function(data, code) {                
+             console.log(`### cipher.rsa decrypt fail ### ${code}: ${data}`);            
+           },        
+       });    
+   }
+}
+```
+
+
+## cipher.aes
+
+aes(Object): void
+
+Encrypts or decrypts data using AES.
+
+**System capability**: SystemCapability.Security.Cipher
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| action | string | Yes | Action&nbsp;type.&nbsp;The&nbsp;options&nbsp;are&nbsp;as&nbsp;follows:<br/>1.&nbsp;**encrypt**:&nbsp;Encrypts&nbsp;data.<br/>2.&nbsp;**decrypt**:&nbsp;Decrypts&nbsp;data. |
+| text | string | Yes | Text&nbsp;content&nbsp;to&nbsp;be&nbsp;encrypted&nbsp;or&nbsp;decrypted.&nbsp;The&nbsp;text&nbsp;to&nbsp;be&nbsp;encrypted&nbsp;must&nbsp;be&nbsp;a&nbsp;common&nbsp;text.&nbsp;The&nbsp;text&nbsp;content&nbsp;to&nbsp;be&nbsp;decrypted&nbsp;must&nbsp;be&nbsp;a&nbsp;binary&nbsp;value&nbsp;encoded&nbsp;using&nbsp;Base64.&nbsp;The&nbsp;default&nbsp;format&nbsp;is&nbsp;used&nbsp;for&nbsp;Base64&nbsp;encoding. |
+| key | string | Yes | Key&nbsp;used&nbsp;for&nbsp;encryption&nbsp;or&nbsp;decryption,&nbsp;which&nbsp;is&nbsp;a&nbsp;character&nbsp;string&nbsp;encrypted&nbsp;using&nbsp;Base64. |
+| transformation | string | No | Encryption&nbsp;mode&nbsp;and&nbsp;padding&nbsp;of&nbsp;the&nbsp;AES&nbsp;algorithm.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**AES/CBC/PKCS5Padding**. |
+| iv | string | No | Initial&nbsp;vector&nbsp;for&nbsp;AES-based&nbsp;encryption&nbsp;and&nbsp;decryption.&nbsp;The&nbsp;value&nbsp;is&nbsp;a&nbsp;character&nbsp;string&nbsp;encoded&nbsp;using&nbsp;Base64.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;the&nbsp;key&nbsp;value. |
+| ivOffset | string | No | Offset&nbsp;of&nbsp;the&nbsp;initial&nbsp;vector&nbsp;for&nbsp;AES-based&nbsp;encryption&nbsp;and&nbsp;decryption.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**0**. |
+| ivLen | string | No | Length&nbsp;of&nbsp;the&nbsp;initial&nbsp;vector&nbsp;for&nbsp;AES-based&nbsp;encryption&nbsp;and&nbsp;decryption.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**16**. |
+| success | Function | No | Called&nbsp;when&nbsp;data&nbsp;is&nbsp;encrypted&nbsp;or&nbsp;decrypted&nbsp;successfully. |
+| fail | Function | No | Called&nbsp;when&nbsp;data&nbsp;fails&nbsp;to&nbsp;be&nbsp;encrypted&nbsp;or&nbsp;decrypted. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+**Example**
+
+```
+export default {    
+  aes() {        
+    cipher.aes({            
+  // Encrypt data.
+      action: 'encrypt',            
+  // Text content to be encrypted
+      text: 'hello',            
+  // Base64-encoded key used for encryption
+      key: 'NDM5Qjk2UjAzMEE0NzVCRjlFMkQwQkVGOFc1NkM1QkQ=',            
+      transformation: 'AES/CBC/PKCS5Padding',            
+      ivOffset: 0,            
+      ivLen: 16,            
+      success: (data) => {                
+        console.log('handling success: ${data.text}');            
+      },            
+      fail: (data, code) => {                
+        console.log(`### cipher.aes encrypt fail ### ${code}: ${data}`);            
+      }        
+    });        
+    cipher.aes({            
+  // Decrypt data.
+      action: 'decrypt',            
+  // Text to be decrypted, which is a Base64-encoded binary value
+      text: 'CUg3tTxTIdpCfreIxIBdws3uhd5qXLwcrVl3XDnQzZFVHyjVVCDHS16rjopaZ4C5xU2Tc8mSDzt7\n' +            
+      'gp9vBfSwi7bMtSUvXG18DlncsKJFDkJpS5t0PkpS9YrJXrY80Gpe+ME6+6dN9bjgqMljbitDdBRf\n' +            
+      'S/ZWNI4Q8Q0suNjNkGU=',            
+  // Base64-encoded key used for decryption
+       key: 'NDM5Qjk2UjAzMEE0NzVCRjlFMkQwQkVGOFc1NkM1QkQ=',            
+       transformation: 'AES/CBC/PKCS5Padding',            
+       ivOffset: 0,            
+       ivLen: 16,            
+       success: (data) => {                
+         this.dealTxt = data.text;            
+       },            
+       fail: (data, code) => {               
+         prompt.showToast({                    
+           message: (`### cipher.aes decrypt fail ### code = ${code}: ${data}`)                
+         })            
+       },        
+    });    
+  }
+}
+
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-configuration.md

+# Application Configuration
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.i18n`](js-apis-i18n.md) and [`@ohos.intl`](js-apis-intl.md) instead.
+>
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import configuration from '@system.configuration';
+```
+
+
+## configuration.getLocale
+
+getLocale(): <LocaleResponse>
+
+Obtains the current locale of the application, which is the same as the system locale.
+
+**System capability**: SystemCapability.ArkUI.ArkUI.Lite
+
+**Return values**
+**Table 1** LocaleResponse
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| language | string | Current language of the application, for example, **zh**. |
+| countryOrRegion | string | Country or region, for example, **CN**. |
+| dir | string | Text&nbsp;layout&nbsp;direction.&nbsp;Available&nbsp;values&nbsp;are&nbsp;as&nbsp;follows:<br/>-&nbsp;**ltr**:&nbsp;The&nbsp;text&nbsp;direction&nbsp;is&nbsp;from&nbsp;left&nbsp;to&nbsp;right.<br/>-&nbsp;**rtl**:&nbsp;The&nbsp;text&nbsp;direction&nbsp;is&nbsp;from&nbsp;right&nbsp;to&nbsp;left. |
+| unicodeSetting<sup>5+</sup> | string | Unicode&nbsp;key&nbsp;set&nbsp;determined&nbsp;by&nbsp;the&nbsp;locale.<br/>For&nbsp;example,&nbsp;**{"nu":"arab"}**&nbsp;indicates&nbsp;that&nbsp;the&nbsp;current&nbsp;locale&nbsp;uses&nbsp;Arabic&nbsp;numerals.<br/>If&nbsp;the&nbsp;current&nbsp;locale&nbsp;does&nbsp;not&nbsp;have&nbsp;a&nbsp;specific&nbsp;key&nbsp;set,&nbsp;an&nbsp;empty&nbsp;set&nbsp;is&nbsp;returned. |
+
+**Example**
+
+```
+export default {    
+  getLocale() {        
+    const localeInfo = configuration.getLocale();        
+    console.info(localeInfo.language);    
+  }
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-device.md

+# Device Information
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 6. It is recommended that you use [`@ohos.deviceInfo`](js-apis-device-info.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import device from '@system.device';
+```
+
+
+## device.getInfo
+
+getInfo(Object): void
+
+Obtains the device information.
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> Do not call **device.getInfo** before the **onShow** event of the home page.
+
+**System capability**: SystemCapability.Startup.SysInfo
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called when the device information is obtained |
+| fail | Function | No | Called when the device information fails to be obtained |
+| complete | Function | No | Called when the execution is complete |
+
+The following values will be returned when the device information is obtained.
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| brand | string | Brand |
+| manufacturer | string | Manufacturer |
+| model | string | Model |
+| product | string | Product number |
+| language<sup>4+</sup> | string | System&nbsp;language |
+| region<sup>4+</sup> | string | System&nbsp;region |
+| windowWidth | number | Window&nbsp;width |
+| windowHeight | number | Window&nbsp;height |
+| screenDensity<sup>4+</sup> | number | Screen&nbsp;density |
+| screenShape<sup>4+</sup> | string | Screen&nbsp;shape.&nbsp;The&nbsp;options&nbsp;are&nbsp;as&nbsp;follows:<br/>-&nbsp;rect:&nbsp;rectangle&nbsp;screen<br/>-&nbsp;circle:&nbsp;circle&nbsp;screen |
+| apiVersion<sup>4+</sup> | number | API&nbsp;version |
+| releaseType<sup>4+</sup> | string | Release&nbsp;type.&nbsp;The&nbsp;value&nbsp;includes&nbsp;both&nbsp;the&nbsp;release&nbsp;type&nbsp;and&nbsp;the&nbsp;API&nbsp;version,&nbsp;for&nbsp;example,&nbsp;Beta1.<br/>Available&nbsp;release&nbsp;types&nbsp;are&nbsp;as&nbsp;follows:<br/>-&nbsp;**Canary**:&nbsp;For&nbsp;the&nbsp;same&nbsp;API&nbsp;version,&nbsp;different&nbsp;canary&nbsp;releases&nbsp;are&nbsp;compatible&nbsp;with&nbsp;each&nbsp;other,&nbsp;but&nbsp;not&nbsp;compatible&nbsp;with&nbsp;those&nbsp;of&nbsp;the&nbsp;**beta**&nbsp;and&nbsp;**release**&nbsp;type.<br/>-&nbsp;**Beta**:&nbsp;For&nbsp;the&nbsp;same&nbsp;API&nbsp;version,&nbsp;different&nbsp;beta&nbsp;releases&nbsp;are&nbsp;compatible&nbsp;with&nbsp;each&nbsp;other,&nbsp;but&nbsp;not&nbsp;compatible&nbsp;with&nbsp;those&nbsp;of&nbsp;the&nbsp;**release**&nbsp;type.<br/>-&nbsp;**Release**:&nbsp;Releases&nbsp;of&nbsp;this&nbsp;type&nbsp;are&nbsp;compatible&nbsp;with&nbsp;the&nbsp;latest&nbsp;five&nbsp;API&nbsp;versions. |
+| deviceType<sup>4+</sup> | string | Device type |
+
+The following error code will be returned if the device information fails to be obtained.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 200 | The&nbsp;returned&nbsp;result&nbsp;contains&nbsp;information&nbsp;that&nbsp;cannot&nbsp;be&nbsp;obtained. |
+
+**Example**
+
+```
+export default {    
+  getInfo() {        
+    device.getInfo({            
+      success: function(data) {                
+        console.log('Device information obtained successfully. Device brand:' + data.brand);            
+      },            
+      fail: function(data, code) {                
+        console.log('Failed to obtain device information. Error code:'+ code + '; Error information: ' + data);            
+      },        
+    });    
+  },
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-fetch.md

+# Data Request
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 6. It is recommended that you use [`@ohos.net.http`](js-apis-http.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import fetch from '@system.fetch';
+```
+
+
+## fetch.fetch
+
+fetch(Object): void
+
+Obtains data through a network.
+
+**Required permissions:** ohos.permission.INTERNET
+
+**System capability**: SystemCapability.Communication.NetStack
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| url | string | Yes | Resource URL. |
+| data | string \| Object | No | Request parameter, which can be a string or a JSON object. For details, see Relationship between data and Content-Type. |
+| header | Object | No | Request header. |
+| method | string | No | Request method. The default value is **GET**. The value can be **OPTIONS**, **GET**, **HEAD**, **POST**, **PUT**, **DELETE **or **TRACE**. |
+| responseType | string | No | Response type. The return type can be text or JSON. By default, the return type is determined based on **Content-Type** in the header returned by the server. For details, see return values of the success callback. |
+| success | Function | No | Called when the network data is obtained successfully. |
+| fail | Function | No | Called when the network data fails to be obtained. |
+| complete | Function | No | Called when the execution is complete. |
+
+  **Table1** Relationship between data and Content-Type
+
+| data | Content-Type | Description |
+| -------- | -------- | -------- |
+| string | Not set | The default value of Content-Type is text/plain, and the value of data is used as the request body. |
+| string | Any type | The value of data is used as the request body. |
+| Object | Not set | The default value of **Content-Type** is **application/x-www-form-urlencoded**. The **data** value is encoded based on the URL rule and appended in the request body. |
+| Object | application/x-www-form-urlencoded | The value of data is encoded based on the URL rule and is used as the request body. |
+
+The following values will be returned when data is successfully obtained.
+
+| Parameter | Type | Description |
+| -------- | -------- | -------- |
+| code | number | Server status code. |
+| data | string \| Object | The type of the returned data is determined by **responseType**. For details, see Relationship between responseType and data returned by the success function. |
+| headers | Object | All headers in the response from the server. |
+
+  **Table2** Relationship between responseType and data returned by the success function
+
+| responseType | data | Description |
+| -------- | -------- | -------- |
+| N/A | string | When the type in the header returned by the server is **text/\***, **application/json**, **application/javascript**, or **application/xml**, the value is the text content. |
+| text | string | Text content. |
+| json | Object | A JSON object. |
+
+**Example**
+
+```
+export default {
+  data: {
+    responseData: 'NA',
+    url: "test_url",
+  },
+  fetch: function () {
+    var that = this;
+    fetch.fetch({
+      url: that.url,
+      success: function(response) {
+        console.info("fetch success");
+        that.responseData = JSON.stringify(response);
+      },
+      fail: function() {
+        console.info("fetch fail");
+      }
+    });
+  }
+}
+```
+
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+>   HTTPS is supported by default. To support HTTP, you need to add **"network"** to the **config.json** file, and set the attribute **"cleartextTraffic"** to **true**. 
+>   
+> ```
+> {
+>   "deviceConfig": {
+>     "default": {
+>       "network": {
+>         "cleartextTraffic": true
+>       }
+>       ...
+>     }
+>   }
+>   ...
+> }
+> ```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-file.md

+# File Storage
+
+
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 6. It is recommended that you use [`@ohos.fileio`](js-apis-fileio.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import file from '@system.file';
+```
+
+
+## file.move
+
+move(Object): void
+
+Moves a specified file to a given location.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| srcUri | string | Yes | URI of the file to move. |
+| dstUri | string | Yes | URI of the location to which the file is to move. |
+| success | Function | No | Called when the source file is moved to the specified location successfully. This function returns the URI of the destination location. |
+| fail | Function | No | Called when the operation fails. |
+| complete | Function | No | Called when the execution is complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error Code | Description |
+| -------- | -------- |
+| 202 | Invalid parameter. |
+| 300 | I/O error. |
+| 301 | File or directory not exist. |
+
+**Example**
+
+```
+export default {    
+  move() {        
+    file.move({            
+      srcUri: 'internal://app/myfiles1',            
+      dstUri: 'internal://app/myfiles2',            
+      success: function(uri) {                
+        console.log('call success callback success');            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
+
+
+## file.copy
+
+copy(Object): void
+
+Copies a file and saves the copy to a specified location. 
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| srcUri | string | Yes | URI of the file to copy. |
+| dstUri | string | Yes | URI&nbsp;of&nbsp;the&nbsp;location&nbsp;to&nbsp;which&nbsp;the&nbsp;copy&nbsp;is&nbsp;to&nbsp;save.<br>The&nbsp;directory&nbsp;of&nbsp;application&nbsp;resources&nbsp;and&nbsp;URI&nbsp;of&nbsp;the&nbsp;**tmp**&nbsp;type&nbsp;are&nbsp;not&nbsp;supported. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;source&nbsp;file&nbsp;is&nbsp;copied&nbsp;and&nbsp;saved&nbsp;to&nbsp;the&nbsp;specified&nbsp;location&nbsp;successfully.&nbsp;This&nbsp;function&nbsp;returns&nbsp;the&nbsp;URI&nbsp;of&nbsp;the&nbsp;destination&nbsp;location. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | File&nbsp;or&nbsp;directory&nbsp;not&nbsp;exist. |
+
+**Example**
+
+```
+export default {    
+  copy() {        
+    file.copy({            
+      srcUri: 'internal://app/file.txt',            
+      dstUri: 'internal://app/file_copy.txt',            
+      success: function(uri) {                
+        console.log('call success callback success');            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  }
+}
+```
+
+
+## file.list
+
+list(Object): void
+
+Obtains the list of all files in a specified directory. 
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;the&nbsp;directory. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+Return values of the **success** callback
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| fileList | Array&lt;FileInfo&gt; | File&nbsp;list.&nbsp;The&nbsp;format&nbsp;of&nbsp;each&nbsp;file&nbsp;is&nbsp;as&nbsp;follows:<br/>{<br/>uri:'file1',<br/>lastModifiedTime:1589965924479,<br/>length:10240,<br/>type:&nbsp;'file'<br/>} |
+
+**Table1** FileInfo
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| uri | string | File&nbsp;URI. |
+| lastModifiedTime | number | Timestamp&nbsp;when&nbsp;the&nbsp;file&nbsp;is&nbsp;stored&nbsp;the&nbsp;last&nbsp;time,&nbsp;which&nbsp;is&nbsp;the&nbsp;number&nbsp;of&nbsp;milliseconds&nbsp;elapsed&nbsp;since&nbsp;1970/01/01&nbsp;00:00:00&nbsp;GMT. |
+| length | number | File&nbsp;size,&nbsp;in&nbsp;bytes. |
+| type | string | File&nbsp;type.&nbsp;Available&nbsp;values&nbsp;are&nbsp;as&nbsp;follows:<br/>-&nbsp;**dir**:&nbsp;directory<br/>-&nbsp;**file**:&nbsp;file |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | File&nbsp;or&nbsp;directory&nbsp;not&nbsp;exist. |
+
+**Example**
+
+```
+export default {    
+  list() {        
+    file.list({            
+      uri: 'internal://app/pic',            
+      success: function(data) {                
+        console.log(data.fileList);            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
+
+
+## file.get
+
+get(Object): void
+
+Obtains information about a specified local file. 
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | File&nbsp;URI. |
+| recursive | boolean | No | Whether&nbsp;to&nbsp;recursively&nbsp;obtain&nbsp;the&nbsp;file&nbsp;list&nbsp;under&nbsp;a&nbsp;subdirectory.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**false**. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+Return values of the **success** callback
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| uri | string | File&nbsp;URI. |
+| length | number | File&nbsp;size,&nbsp;in&nbsp;bytes. |
+| lastModifiedTime | number | Timestamp&nbsp;when&nbsp;the&nbsp;file&nbsp;is&nbsp;stored&nbsp;the&nbsp;last&nbsp;time,&nbsp;which&nbsp;is&nbsp;the&nbsp;number&nbsp;of&nbsp;milliseconds&nbsp;elapsed&nbsp;since&nbsp;1970/01/01&nbsp;00:00:00&nbsp;GMT. |
+| type | string | File&nbsp;type.&nbsp;The&nbsp;values&nbsp;are&nbsp;as&nbsp;follows:<br/>-&nbsp;**dir**:&nbsp;directory<br/>-&nbsp;**file**:&nbsp;file |
+| subFiles | Array | File&nbsp;list. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | File&nbsp;or&nbsp;directory&nbsp;not&nbsp;exist. |
+
+**Example**
+
+```
+export default {    
+  get() {        
+    file.get({            
+      uri: 'internal://app/file',            
+      success: function(data) {                
+        console.log(data.uri);            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  }
+}
+```
+
+
+## file.delete
+
+delete(Object): void
+
+Deletes local files. 
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;the&nbsp;file&nbsp;to&nbsp;delete,&nbsp;which&nbsp;cannot&nbsp;be&nbsp;an&nbsp;application&nbsp;resource&nbsp;path. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Incorrect&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | File&nbsp;or&nbsp;directory&nbsp;not&nbsp;exist. |
+
+**Example**
+
+```
+export default {    
+  delete() {        
+    file.delete({            
+      uri: 'internal://app/my_file',            
+      success: function() {                
+        console.log('call delete success.');            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  }
+}
+```
+
+
+## file.writeText
+
+writeText(Object): void
+
+Writes text into a specified file.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;a&nbsp;local&nbsp;file.&nbsp;If&nbsp;it&nbsp;does&nbsp;not&nbsp;exist,&nbsp;a&nbsp;file&nbsp;will&nbsp;be&nbsp;created. |
+| text | string | Yes | Character&nbsp;string&nbsp;to&nbsp;write&nbsp;into&nbsp;the&nbsp;local&nbsp;file. |
+| encoding | string | No | Encoding&nbsp;format.&nbsp;The&nbsp;default&nbsp;format&nbsp;is&nbsp;UTF-8. |
+| append | boolean | No | Whether&nbsp;to&nbsp;enable&nbsp;the&nbsp;append&nbsp;mode.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**false**. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Incorrect&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+
+**Example**
+
+```
+export default {    
+  writeText() {        
+    file.writeText({            
+      uri: 'internal://app/test.txt',            
+      text: 'Text that just for test.',            
+      success: function() {                
+        console.log('call writeText success.');            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
+
+
+## file.writeArrayBuffer
+
+writeArrayBuffer(Object): void
+
+Writes buffer data into a specified file.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;a&nbsp;local&nbsp;file.&nbsp;If&nbsp;it&nbsp;does&nbsp;not&nbsp;exist,&nbsp;a&nbsp;file&nbsp;will&nbsp;be&nbsp;created. |
+| buffer | Uint8Array | Yes | Buffer&nbsp;from&nbsp;which&nbsp;the&nbsp;data&nbsp;is&nbsp;derived. |
+| position | number | No | Offset&nbsp;to&nbsp;the&nbsp;position&nbsp;where&nbsp;the&nbsp;writing&nbsp;starts.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**0**. |
+| append | boolean | No | Whether&nbsp;to&nbsp;enable&nbsp;the&nbsp;append&nbsp;mode.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**false**.&nbsp;If&nbsp;the&nbsp;value&nbsp;is&nbsp;**true**,&nbsp;the&nbsp;**position**&nbsp;parameter&nbsp;will&nbsp;become&nbsp;invalid. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+
+**Example**
+
+```
+export default {    
+  writeArrayBuffer() {       
+    file.writeArrayBuffer({           
+      uri: 'internal://app/test',           
+      buffer: new Uint8Array(8), // The buffer is of the Uint8Array type.
+      success: function() {                
+        console.log('call writeArrayBuffer success.');            
+      },           
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  }
+}
+```
+
+
+## file.readText
+
+readText(Object): void
+
+Reads text from a specified file.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;a&nbsp;local&nbsp;file. |
+| encoding | string | No | Encoding&nbsp;format.&nbsp;The&nbsp;default&nbsp;format&nbsp;is&nbsp;UTF-8. |
+| position | number | No | Position&nbsp;where&nbsp;the&nbsp;reading&nbsp;starts.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;the&nbsp;start&nbsp;position&nbsp;of&nbsp;the&nbsp;file. |
+| length | number | No | Length&nbsp;of&nbsp;the&nbsp;text&nbsp;to&nbsp;be&nbsp;read&nbsp;(in&nbsp;bytes).&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**4096**. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+Return values of the **success** callback
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| text | string | Text&nbsp;read&nbsp;from&nbsp;the&nbsp;specified&nbsp;file. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | The&nbsp;file&nbsp;or&nbsp;directory&nbsp;does&nbsp;not&nbsp;exist. |
+| 302 | The&nbsp;size&nbsp;of&nbsp;text&nbsp;to&nbsp;read&nbsp;exceeds&nbsp;4096&nbsp;bytes. |
+
+**Example**
+
+```
+export default {    
+  readText() {        
+    file.readText({            
+      uri: 'internal://app/text.txt',            
+      success: function(data) {                
+        console.log('call readText success: ' + data.text);            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
+
+
+## file.readArrayBuffer
+
+readArrayBuffer(Object): void
+
+Reads buffer data from a specified file.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;a&nbsp;local&nbsp;file. |
+| position | number | No | Position&nbsp;where&nbsp;the&nbsp;reading&nbsp;starts.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;the&nbsp;start&nbsp;position&nbsp;of&nbsp;the&nbsp;file. |
+| length | number | No | Length&nbsp;of&nbsp;data&nbsp;to&nbsp;read.&nbsp;If&nbsp;this&nbsp;parameter&nbsp;is&nbsp;not&nbsp;set,&nbsp;the&nbsp;reading&nbsp;proceeds&nbsp;until&nbsp;the&nbsp;end&nbsp;of&nbsp;the&nbsp;file. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+Return values of the **success** callback
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| buffer | Uint8Array | File&nbsp;content&nbsp;that&nbsp;is&nbsp;read |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | File&nbsp;or&nbsp;directory&nbsp;not&nbsp;exist. |
+
+**Example**
+
+```
+export default {    
+  readArrayBuffer() {        
+    file.readArrayBuffer({            
+      uri: 'internal://app/test',            
+      position: 10,            
+      length: 200,            
+      success: function(data) {                
+        console.log('call readArrayBuffer success: ' + data.buffer);            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  }
+}
+```
+
+
+## file.access
+
+access(Object): void
+
+Checks whether a specified file or directory exists.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;the&nbsp;directory&nbsp;or&nbsp;file. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | File&nbsp;or&nbsp;directory&nbsp;not&nbsp;exist. |
+
+**Example**
+
+```
+export default {    
+  access() {        
+    file.access({            
+      uri: 'internal://app/test',            
+      success: function() {                
+        console.log('call access success.');            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
+
+
+## file.mkdir
+
+mkdir(Object): void
+
+Creates a specified directory.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;the&nbsp;directory. |
+| recursive | boolean | No | Whether&nbsp;to&nbsp;recursively&nbsp;create&nbsp;upper-level&nbsp;directories&nbsp;of&nbsp;the&nbsp;specified&nbsp;directory.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**false**. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+
+**Example**
+
+```
+export default {    
+  mkdir() {        
+    file.mkdir({            
+      uri: 'internal://app/test_directory',            
+      success: function() {                
+        console.log('call mkdir success.');            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  }
+}
+```
+
+
+## file.rmdir
+
+rmdir(Object): void
+
+Deletes a specified directory.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| uri | string | Yes | URI&nbsp;of&nbsp;the&nbsp;directory. |
+| recursive | boolean | No | Whether&nbsp;to&nbsp;recursively&nbsp;delete&nbsp;subfiles&nbsp;and&nbsp;subdirectories&nbsp;of&nbsp;the&nbsp;specified&nbsp;directory.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**false**. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 202 | Invalid&nbsp;parameter. |
+| 300 | I/O&nbsp;error. |
+| 301 | File&nbsp;or&nbsp;directory&nbsp;not&nbsp;exist. |
+
+**Example**
+
+```
+export default {    
+  rmdir() {        
+    file.rmdir({            
+      uri: 'internal://app/test_directory',            
+      success: function() {                
+        console.log('call rmdir success.');            
+      },            
+      fail: function(data, code) {                
+        console.error('call fail callback fail, code: ' + code + ', data: ' + data);            
+      },
+    });    
+  }
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-location.md

+# Geographic Location
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.geolocation`](js-apis-geolocation.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import geolocation from '@system.geolocation';
+```
+
+
+## Required Permissions
+
+ohos.permission.LOCATION
+
+
+## geolocation.getLocation
+
+getLocation(Object): void
+
+Obtains the geographic location.
+
+**System capability**: SystemCapability.Location.Location.Lite
+
+**Parameters**
+
+| Parameter | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| timeout | number | No | Timeout&nbsp;duration,&nbsp;in&nbsp;milliseconds.&nbsp;The&nbsp;default&nbsp;value&nbsp;is&nbsp;**30000**.<br/>The&nbsp;timeout&nbsp;duration&nbsp;is&nbsp;necessary&nbsp;in&nbsp;case&nbsp;the&nbsp;request&nbsp;to&nbsp;obtain&nbsp;the&nbsp;geographic&nbsp;location&nbsp;is&nbsp;rejected&nbsp;for&nbsp;the&nbsp;lack&nbsp;of&nbsp;the&nbsp;required&nbsp;permission,&nbsp;weak&nbsp;positioning&nbsp;signal,&nbsp;or&nbsp;incorrect&nbsp;location&nbsp;settings.&nbsp;After&nbsp;the&nbsp;timeout&nbsp;duration&nbsp;expires,&nbsp;the&nbsp;fail&nbsp;function&nbsp;will&nbsp;be&nbsp;called.<br/>The&nbsp;value&nbsp;is&nbsp;a&nbsp;32-digit&nbsp;positive&nbsp;integer.&nbsp;If&nbsp;the&nbsp;value&nbsp;set&nbsp;is&nbsp;less&nbsp;than&nbsp;or&nbsp;equal&nbsp;to&nbsp;**0**,&nbsp;the&nbsp;default&nbsp;value&nbsp;will&nbsp;be&nbsp;used. |
+| coordType | string | No | Coordinate&nbsp;system&nbsp;type.&nbsp;Available&nbsp;types&nbsp;can&nbsp;be&nbsp;obtained&nbsp;by&nbsp;**getSupportedCoordTypes**.&nbsp;The&nbsp;default&nbsp;type&nbsp;is&nbsp;**wgs84**. |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete |
+
+The following values will be returned when the operation is successful.
+
+| Parameter | Type | Description |
+| -------- | -------- | -------- |
+| longitude | number | Longitude |
+| latitude | number | Latitude |
+| altitude | number | Altitude |
+| accuracy | number | Location&nbsp;accuracy |
+| time | number | Time&nbsp;when&nbsp;the&nbsp;location&nbsp;is&nbsp;obtained |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 601 | Failed&nbsp;to&nbsp;obtain&nbsp;the&nbsp;required&nbsp;permission&nbsp;because&nbsp;the&nbsp;user&nbsp;rejected&nbsp;the&nbsp;request. |
+| 602 | Permission&nbsp;not&nbsp;declared. |
+| 800 | Operation&nbsp;times&nbsp;out&nbsp;due&nbsp;to&nbsp;a&nbsp;poor&nbsp;network&nbsp;condition&nbsp;or&nbsp;unavailable&nbsp;GPS. |
+| 801 | System&nbsp;location&nbsp;disabled. |
+| 802 | The&nbsp;method&nbsp;is&nbsp;called&nbsp;again&nbsp;while&nbsp;the&nbsp;previous&nbsp;execution&nbsp;result&nbsp;is&nbsp;not&nbsp;returned&nbsp;yet. |
+
+**Example**
+
+```
+export default {    
+  getLocation() {        
+    geolocation.getLocation({            
+      success: function(data) {                
+        console.log('success get location data. latitude:' + data.latitude);            
+      },            
+      fail: function(data, code) {                
+        console.log('fail to get location. code:' + code + ', data:' + data);            
+      },
+    });    
+  },
+}
+```
+
+
+## geolocation.getLocationType
+
+getLocationType(Object): void
+
+Obtains the supported location types.
+
+**System capability**: SystemCapability.Location.Location.Lite
+
+**Parameters**
+
+| Parameter | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;successful. |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;operation&nbsp;fails. |
+| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete |
+
+The following values will be returned when the operation is successful.
+
+| Parameter | Type | Description |
+| -------- | -------- | -------- |
+| types | Array&lt;string&gt; | Available&nbsp;location&nbsp;types,&nbsp;['gps',&nbsp;'network'] |
+
+**Example**
+
+```
+export default {    
+  getLocationType() {        
+    geolocation.getLocationType({            
+      success: function(data) {                
+        console.log('success get location type:' + data.types[0]);            
+      },            
+      fail: function(data, code) {                
+        console.log('fail to get location. code:' + code + ', data:' + data);            
+       },        
+     });    
+  },
+}
+```
+
+
+## geolocation.subscribe
+
+subscribe(Object): void
+
+Listens to the geographical location. If this method is called multiple times, the last call takes effect.
+
+**System capability**: SystemCapability.Location.Location.Lite
+
+**Parameters**
+
+| Parameter | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| coordType | string | No | Coordinate&nbsp;system&nbsp;type.&nbsp;Available&nbsp;types&nbsp;can&nbsp;be&nbsp;obtained&nbsp;by&nbsp;**getSupportedCoordTypes**.&nbsp;The&nbsp;default&nbsp;type&nbsp;is&nbsp;**wgs84**. |
+| success | Function | Yes | Called&nbsp;when&nbsp;the&nbsp;geographical&nbsp;location&nbsp;changes |
+| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;listening&nbsp;fails |
+
+The following values will be returned when the network type is obtained.
+
+| Parameter | Type | Description |
+| -------- | -------- | -------- |
+| longitude | number | Longitude |
+| latitude | number | Latitude |
+| altitude | number | Altitude |
+| accuracy | number | Location&nbsp;accuracy |
+| time | number | Time&nbsp;when&nbsp;the&nbsp;location&nbsp;is&nbsp;obtained |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error&nbsp;Code | Description |
+| -------- | -------- |
+| 601 | Failed&nbsp;to&nbsp;obtain&nbsp;the&nbsp;required&nbsp;permission&nbsp;because&nbsp;the&nbsp;user&nbsp;rejected&nbsp;the&nbsp;request. |
+| 602 | Permission&nbsp;not&nbsp;declared. |
+| 801 | System&nbsp;location&nbsp;disabled. |
+
+**Example**
+
+```
+export default {    
+  subscribe() {        
+    geolocation.subscribe({            
+      success: function(data) {                
+        console.log('get location. latitude:' + data.latitude);            
+      },            
+      fail: function(data, code) {                
+        console.log('fail to get location. code:' + code + ', data:' + data);            
+      },        
+    });    
+  },
+}
+```
+
+
+## geolocation.unsubscribe
+
+unsubscribe(): void
+
+Cancels listening to the geographical location.
+
+**System capability**: SystemCapability.Location.Location.Lite
+
+**Example**
+
+```
+export default {    
+  unsubscribe() {        
+    geolocation.unsubscribe();    
+  },
+}
+```
+
+
+## geolocation.getSupportedCoordTypes
+
+getSupportedCoordTypes(): Array&lt;string&gt;
+
+Obtains coordinate system types supported by the device.
+
+**System capability**: SystemCapability.Location.Location.Lite
+
+**Return Value**
+
+| Type | Non-Null | Description |
+| -------- | -------- | -------- |
+| Array&lt;string&gt; | Yes | Coordinate&nbsp;system&nbsp;types,&nbsp;for&nbsp;example,&nbsp;**[wgs84,&nbsp;gcj02]**. |
+
+**Example**
+
+```
+export default {    
+  getSupportedCoordTypes() {       
+    var types = geolocation.getSupportedCoordTypes();    
+  },
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-network.md

+# Network State
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.telephony.observer`](js-apis-observer.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import network from '@system.network';
+```
+
+
+## Required Permissions
+
+ohos.permission.GET_WIFI_INFO
+
+ohos.permission.GET_NETWORK_INFO
+
+
+## network.getType
+
+getType(Object): void
+
+Obtains the network type.
+
+**System capability**: SystemCapability.Communication.NetManager.Core
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called when the execution is successful. |
+| fail | Function | No | Called when the operation fails. |
+| complete | Function | No | Called when the execution is complete |
+
+The following value will be returned when the multimedia volume is obtained.
+
+| Parameter | Type | Description |
+| -------- | -------- | -------- |
+| metered | boolean | Whether the billing is based on the data volume. |
+| type | string | Network type. The value can be **2G**, **3G**, **4G**, **5G**, **WiFi**, or **none**. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error Code | Description |
+| -------- | -------- |
+| 602 | The current permission is not declared. |
+
+**Example**
+
+```
+export default {    
+  getType() {        
+    network.getType({            
+      success: function(data) {                
+        console.log('success get network type:' + data.type);            
+      },            
+      fail: function(data, code) {                
+        console.log('fail to get network type code:' + code + ', data:' + data);            
+      },
+    });    
+  },
+}
+```
+
+
+## network.subscribe
+
+subscribe(Object): void
+
+Listens to the network connection state. If this method is called multiple times, the last call takes effect.
+
+**System capability**: SystemCapability.Communication.NetManager.Core
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called when the network connection state changes |
+| fail | Function | No | Called when the multimedia volume fails to be obtained. |
+
+The following value will be returned when the multimedia volume is obtained.
+
+| Parameter | Type | Description |
+| -------- | -------- | -------- |
+| metered | boolean | Whether the billing is based on the data volume. |
+| type | string | Network type. The value can be **2G**, **3G**, **4G**, **5G**, **WiFi**, or **none**. |
+
+One of the following error codes will be returned if the listening fails.
+
+| Error Code | Description |
+| -------- | -------- |
+| 602 | The current permission is not declared. |
+| 200 | The subscription fails. |
+
+**Example**
+
+```
+export default {    
+  subscribe() {        
+    network.subscribe({            
+      success: function(data) {                
+        console.log('network type change type:' + data.type);            
+      },            
+      fail: function(data, code) {                
+        console.log('fail to subscribe network, code:' + code + ', data:' + data);            
+      },
+    });    
+  },
+}
+```
+
+
+## network.unsubscribe
+
+unsubscribe(): void
+
+Cancels listening to the network connection state.
+
+**System capability**: SystemCapability.Communication.NetManager.Core
+
+**Example**
+
+```
+export default {    
+  unsubscribe() {        
+    network.unsubscribe();    
+  },
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-package.md

+# Application Management
+
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+>
+> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.bundle`](js-apis-Bundle.md) instead.
+>
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import pkg from '@system.package';
+```
+
+
+## package.hasInstalled
+
+hasInstalled(Object): void
+
+Checks whether an application exists, or whether a native application has been installed.
+
+**Required permissions**: ohos.permission.GET_BUNDLE_INFO
+
+**System capability**: SystemCapability.BundleManager.BundleFramework
+
+**Parameter**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| bundleName | string | Yes | Application bundle name |
+| success | Function | No | Called when the check result is obtained |
+| fail | Function | No | Called when the check result fails to be obtained |
+| complete | Function | No | Called when the execution is complete |
+
+The following value will be returned when the check result is obtained.
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| result | boolean | Whether the application exists, or whether the native application has been installed |
+
+**Example**
+
+```
+export default {    
+  hasInstalled() {        
+    pkg.hasInstalled({            
+      bundleName: 'com.example.bundlename',            
+      success: function(data) {                
+        console.log('package has installed: ' + data);            
+      },            
+      fail: function(data, code) {               
+        console.log('query package fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  },
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-request.md

+# Uploading and Downloading
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 6. It is recommended that you use [`@ohos.request`](js-apis-request.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 4. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import request from '@system.request';
+```
+
+## Required Permissions
+
+ohos.permission.INTERNET.
+
+
+## request.upload
+
+upload(Object): void
+
+Uploads files.
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| url | string | Yes | URL of the upload server. |
+| header | Object | No | Request header. |
+| method | string | No | Request methods available: **POST** and **PUT**. The default value is **POST**. |
+| files | Array<File> | Yes | List of files to upload, which is submitted through **multipart/form-data**. |
+| data | Array<RequestData> | No | Form data in the request body. |
+| success | Function | No | Called when the download task is complete. |
+| fail | Function | No | Called when downloading fails or the task does not exist. |
+| complete | Function | No | Called when the execution is complete. |
+
+**Table 1** File
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| filename | string | No | File name in the header when **multipart** is used. |
+| name | string | No | Name of a form item when **multipart** is used. The default value is **file**. |
+| uri | string | Yes | Local storage path of a file. |
+| type | string | No | Type of the file content. By default, the type is obtained based on the suffix of the file name or URI. |
+
+**Table 2** RequestData
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| name | string | Yes | Name of the form element |
+| value | string | Yes | Value of the form element |
+
+The following values will be returned when the files are successfully uploaded.
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| code | number | HTTP status code returned by the server. |
+| data | string | Content returned by the server. The value type is determined by the type in the returned headers. |
+| headers | Object | Headers returned by the server. |
+
+**Example**
+
+```
+export default {    
+  upLoad() {
+    request.upload({
+      url: 'http://www.path.com',
+      files: [
+        {
+           uri: 'internal://cache/path/to/file.txt',
+           name: 'file',
+           filename: 'file.txt',
+        },
+      ],
+      data:[
+        {
+          name: 'name1',
+          value: 'value',
+         },
+       ],
+       success: function(data) {
+         console.log('upload success, code:' + data.code);
+       },
+       fail: function() {
+         console.log('upload fail');
+       },
+     });
+  }
+}
+```
+
+
+## request.download
+
+download(Object): void
+
+Downloads files.
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| url | string | Yes | Resource URL. |
+| header | Object | No | Request header. |
+| description | string | No | Download description. The default value is the file name. |
+| filename | string | No | Name of the file to download. The value is obtained from the current request or resource URL by default. |
+| success | Function | No | Called when the download task is complete. |
+| fail | Function | No | Called when downloading fails or the task does not exist. |
+| complete | Function | No | Called when the execution is complete. |
+
+Return values of the **success** callback
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| token | string | Download token, which is used to obtain the download status. |
+
+One of the following error codes will be returned if the operation fails.
+
+| Error Code | Description |
+| -------- | -------- |
+| 400 | Download task failed |
+
+**Example**
+
+```
+export default {    
+  downLoad() {        
+    request.download({            
+      url: 'http://www.path.com',            
+      success: function(data) {                
+        console.log('call success callback success: ' + data.token);            
+      },            
+      fail: function(data, code) {                
+        console.log('handling fail');            
+      },        
+    });    
+  }
+}
+```
+
+
+## request.onDownloadComplete
+
+onDownloadComplete(Object): void
+
+Listens to download task status.
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| token | string | Yes | Token of the result returned by the download method |
+| success | Function | No | Called when the download task is complete. |
+| fail | Function | No | Called when downloading fails or the task does not exist. |
+| complete | Function | No | Called when the execution is complete. |
+
+Return values of the **success** callback
+
+| Name | Type | Description |
+| -------- | -------- | -------- |
+| uri | string | URI of the download file |
+
+One of the following error codes will be returned if the listening fails.
+
+| Error Code | Description |
+| -------- | -------- |
+| 400 | Download task failed |
+| 401 | Download task not exist |
+
+**Example**
+
+```
+export default {    
+  onDownloadComplete() {        
+    request.onDownloadComplete({            
+      token: 'token-index',            
+      success: function(data) {                
+        console.log('download success, uri:' + data.uri);            
+      },            
+      fail: function(data, code) {                
+        console.log('download fail');            
+      },
+    });    
+  }
+}
+```
\ No newline at end of file

en/application-dev/reference/apis/js-apis-system-storage.md

+# Data Storage
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
+> - The APIs of this module are no longer maintained since API version 6. It is recommended that you use [`@ohos.data.storage`](js-apis-data-storage.md) instead.
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import storage from '@system.storage';
+```
+
+
+## storage.get
+
+get(Object): void
+
+Reads the stored content.
+
+**System capability**: SystemCapability.DistributedDataManager.Preferences.Core
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| key | string | Yes | Content index. |
+| default | string | No | Default value returned when the **key** does not exist. |
+| success | Function | No | Called when the stored content is successfully read. |
+| fail | Function | No | Called when the stored content fails to be read. |
+| complete | Function | No | Called when the execution is complete. |
+
+**Example**
+
+```
+export default {    
+  storageGet() {        
+    storage.get({            
+      key: 'storage_key',            
+      success: function(data) {                
+        console.log('call storage.get success: ' + data);            
+      },            
+      fail: function(data, code) {                
+        console.log('call storage.get fail, code: ' + code + ', data: ' + data);            
+      },            
+      complete: function() {                
+        console.log('call complete');            
+      },
+    });    
+  }
+}
+```
+
+
+## storage.set
+
+set(Object): void
+
+Modifies the stored content.
+
+**System capability**: SystemCapability.DistributedDataManager.Preferences.Core
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| key | string | Yes | Index of the stored content to be modified. |
+| value | string | No | Target storage content. The maximum number of characters allowed is 128. |
+| success | Function | No | Called when the stored content is modified successfully. |
+| fail | Function | No | Called when the stored content fails to be modified. |
+| complete | Function | No | Called when the execution is complete. |
+
+**Example**
+
+```
+export default {    
+  storageSet() {        
+    storage.set({            
+      key: 'storage_key',            
+      value: 'storage value',            
+      success: function() {                
+        console.log('call storage.set success.');            
+      },            
+      fail: function(data, code) {                
+        console.log('call storage.set fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
+
+
+## storage.clear
+
+clear(Object): void
+
+Clears the stored content.
+
+**System capability**: SystemCapability.DistributedDataManager.Preferences.Core
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| success | Function | No | Called when the stored content is cleared successfully |
+| fail | Function | No | Called when the stored content fails to be cleared |
+| complete | Function | No | Called when the execution is complete |
+
+**Example**
+
+```
+export default {    
+  storageClear() {        
+    storage.clear({            
+      success: function() {                
+        console.log('call storage.clear success.');            
+      },            
+      fail: function(data, code) {                
+        console.log('call storage.clear fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
+
+
+## storage.delete
+
+delete(Object): void
+
+Deletes the stored content.
+
+**System capability**: SystemCapability.DistributedDataManager.Preferences.Core
+
+**Parameters**
+
+| Name | Type | Mandatory | Description |
+| -------- | -------- | -------- | -------- |
+| key | string | Yes | Content index. |
+| success | Function | No | Called when the stored content is deleted successfully. |
+| fail | Function | No | Called when the stored content fails to be deleted. |
+| complete | Function | No | Called when the execution is complete. |
+
+**Example**
+
+```
+export default {    
+  storageDelete() {        
+    storage.delete({            
+      key: 'Storage1',            
+      success: function() {                
+        console.log('call storage.delete success.');            
+      },            
+      fail: function(data, code) {                
+        console.log('call storage.delete fail, code: ' + code + ', data: ' + data);            
+      },        
+    });    
+  }
+}
+```
\ No newline at end of file