| src | string | - | No |Address of the web page to be displayed. The domain name of the website must compile with the HTTPS protocol and have received an ICP license.|
| id | string | - | No | Unique ID of the component. |
## Styles
Universal style settings are not supported.
## Events
The following events are supported.
| Name| Parameter| Description|
| -------- | -------- | -------- |
| pagestart | {url: string} | Triggered when web page loading starts.|
| pagefinish | {url: string} | Triggered when web page loading is completed. |
| error | {url: string, errorCode: number, description: string} | Triggered when an error occurs during web page loading or opening. |
| domStorageAccess | boolean | false | Whether to enable the DOM Storage API permission. By default, the permission is disabled.|
| fileAccess | boolean | true | Whether to enable in-application rawfile access through [$rawfile(filepath/filename)](ts-application-resource-access.md#referencing-resources). By default, this feature is enabled. |
| imageAccess | boolean | true | Whether to enable automatic image loading. By default, this feature is enabled. |
| javaScriptProxy | { <br> object: object, <br> name: string, <br> methodList: Array\<string\>, <br> controller: WebController <br>} | - | JavaScript object to be injected into the window. Methods of this object can be invoked in the window. The parameters in this attribute cannot be updated.<br>**object** indicates the object to be registered. Methods can be declared, but not attributes. The parameters and return value can only be of the string, number, or Boolean type.<br>**name** indicates the name of the object to be registered, which is the same as that invoked in the window. After registration, the window can use this name to access the JavaScript object at the application side.<br>**methodList** indicates the methods of the JavaScript object to be registered at the application side.<br>**controller** indicates the controller. |
| javaScriptAccess | boolean | true | Whether JavaScript scripts can be executed. By default, JavaScript scripts can be executed. |
| mixedMode | [MixedMode](#MixedMode) | MixedMode.None | Whether to enable loading of HTTP and HTTPS hybrid content can be loaded. By default, this feature is disabled.|
| onlineImageAccess | boolean | true | Whether to enable access to online images through HTTP and HTTPS. By default, this feature is enabled.|
| zoomAccess | boolean | true | Whether to enable zoom gestures. By default, zoom gestures are enabled. |
> Only the following universal attributes are supported: [width](ts-universal-attributes-size.md#Attributes), [height](ts-universal-attributes-size.md#Attributes), [padding](ts-universal-attributes-size.md#Attributes), [margin](ts-universal-attributes-size.md#Attributes), and [border](ts-universal-attributes-border.md#Attributes).
| onAlert(callback: (event?: { url: string; message: string; result: [JsResult](#JsResult) }) => boolean) | <p>Triggered when **alert()** is invoked to display an alert dialog box on the web page.<br>If the callback returns **false**, the default dialog box is displayed. If the callback returns **true**, a system application can invoke the system dialog box capability (allows only the confirm operation) and invoke the **JsResult** API to notify the **\<Web>** component of the user's operation.<br>**url**: URL of the web page where the dialog box is displayed.<br>**message**: information displayed in the dialog box.<br>**JsResult**: notifies the **\<Web>** component of the user's operation.</p> |
| onBeforeUnload(callback: (event?: { url: string; message: string; result: [JsResult](#JsResult) }) => boolean) | <p>Triggered when the current page is about to exit after the user refreshes or closes the page.<br>If the callback returns **false**, the default dialog box is displayed. If the callback returns **true**, a system application can invoke the system dialog box capability (allows the confirm and cancel operations) and invoke the **JsResult** API to notify the **\<Web>** component of the user's operation.<br>**url**: URL of the web page where the dialog box is displayed.<br>**message**: information displayed in the dialog box.<br>**JsResult**: notifies the **\<Web>** component of the user's operation.</p> |
| onConfirm(callback: (event?: { url: string; message: string; result: [JsResult](#JsResult) }) => boolean) | <p>Triggered when **confirm()** is invoked to display a confirmation dialog box on the web page.<br>If the callback returns **false**, the default dialog box is displayed. If the callback returns **true**, a system application can invoke the system dialog box capability (allows the confirm and cancel operations) and invoke the **JsResult** API to notify the **\<Web>** component of the user's operation.<br>**url**: URL of the web page where the dialog box is displayed.<br>**message**: information displayed in the dialog box.<br>**JsResult**: notifies the **\<Web>** component of the user's operation.</p> |
| onConsole(callback: (event?: { message: [ConsoleMessage](#ConsoleMessage) }) => boolean) | <p>Triggered when the host application is notified of a JavaScript console message.<br>**message**: console message.</p> |
| onDownloadStart(callback: (event?: { url: string, userAgent: string, contentDisposition: string, mimetype: string, contentLength: number }) => void) | <p>Triggered when a download task starts on the web page.<br>**url**: URL for the download task.<br>**userAgent**: name of the user agent (UA) for the download task.<br>**contentDisposition**: Content-Disposition response header returned by the server, which may be empty.<br>**mimetype**: content media type (MIME) returned by the server.<br>**contentLength**: length of the file returned by the server.</p> |
| onErrorReceive(callback: (event?: { request: [WebResourceRequest](#WebResourceError), error: [WebResourceError](#WebResourceError) }) => void) | <p>Triggered when an error occurs during web page loading.<br>For best results, simplify the implementation logic in the callback.<br>**request**: encapsulation of a web page request.<br>**error**: encapsulation of a web page resource loading error.</p> |
| onHttpErrorReceive(callback: (event?: { request: [WebResourceRequest](#WebResourceError), response: [WebResourceResponse](#WebResourceResponse) }) => void) | <p>Triggered when an HTTP error (the response code is greater than or equal to 400) occurs during web page resource loading.<br>**request**: encapsulation of a web page request.<br>**response**: encapsulation of a web page response.</p> |
| onPageBegin(callback: (event?: { url: string }) => void) | <p>Triggered when the web page starts to be loaded. This API is triggered only for the main frame content, and not for the iframe or frameset content.<br>**url**: URL of the page.</p> |
| onPageEnd(callback: (event?: { url: string }) => void) | <p>Triggered when the web page loading is complete. This API is triggered only for the main frame content.<br>**url**: URL of the page.</p> |
| onProgressChange(callback: (event?: { newProgress: number }) => void) | <p>Triggered when the web page loading progress changes.<br>**newProgress**: new loading progress. The value is an integer ranging from 0 to 100.</p> |
| onTitleReceive(callback: (event?: { title: string }) => void) | <p>Triggered when the document title of the web page is changed.<br>**title**: document title.</p> |
| name | string | Yes | - | Name of the registered JavaScript object, which can be used to invoke the corresponding object on the application side from the web side.|
### forward
forward(): void
Goes to the next page based on the history stack. This API is generally used together with **accessForward**.
### getHitTest
getHitTest(): HitTestType
Obtains the element type of the area being clicked.
Loads data. If **baseUrl** is empty, the specified character string will be loaded using the data protocol.
If **baseUrl** is set to a data URL, the encoded character string will be loaded by the **\<Web>** component using the data protocol.
If **baseUrl** is set to an HTTP or HTTPS URL, the encoded character string will be loaded by the **\<Web>** component as non-encoded string in a manner similar to **loadUrl**.
- options
| Name | Type| Mandatory| Default Value| Description |
| data | string | Yes | - | Character string obtained after being Base64 or URL encoded. |
| mimeType | string | Yes | - | Media type (MIME). |
| encoding | string | Yes | - | Encoding type, which can be Base64 or URL. |
| baseUrl | string | No | - | URL (HTTP/HTTPS/data compliant), which is assigned by the **\<Web>** component to **window.origin**.|
| historyUrl | string | No | - | Historical record URL. If this parameter is not empty, it can be managed in historical records to implement page going backward and forward. This parameter is invalid when **baseUrl** is left empty.|
Injects a JavaScript object into the window and invokes the methods of the object in the window. After the registration, the **refresh** API must be invoked for the registration to take effect.
- options
| Name | Type | Mandatory| Default Value| Description |
| object | object | Yes | - | Application-side JavaScript object to be registered. Methods can be declared, but not attributes. The parameters and return value can only be of the string, number, or Boolean type.|
| name | string | Yes | - | Name of the object to be registered, which is the same as that invoked in the window. After registration, the window can use this name to access the JavaScript object at the application side.|
| methodList | Array\<string\> | Yes | - | Methods of the JavaScript object to be registered at the application side. |
Asynchronously executes a JavaScript script. This API uses a callback to return the script execution result.**runJavaScript** can be invoked only after **loadUrl** is executed. For example, it can be executed in **onPageEnd**.
- options
| Name | Type | Mandatory| Default Value| Description |
| callback | (result: string) => void | No | - | Callback used to return the result. Returns **null** if the JavaScript script fails to be executed or no value is returned.|
