diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputconsumer.md b/zh-cn/application-dev/reference/apis/js-apis-inputconsumer.md
index 9b73e3ce7fc3e2d0689acfb896cea239d8bae90d..913a7ffef022ed6035f8419b6700d5dc6e294204 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-inputconsumer.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputconsumer.md
@@ -38,10 +38,17 @@ on(type: "key", keyOptions: KeyOptions, callback: Callback<KeyOptions>): v
 ```js
 let leftAltKey = 2045;
 let tabKey = 2049;
+let keyOptions: inputConsumer.KeyOptions = {
+  preKeys: [ leftAltKey ],
+  finalKey: tabKey,
+  isFinalKeyDown: true,
+  finalKeyDownDuration: 0
+};
+let callback = (keyOptions: inputConsumer.KeyOptions) => {
+  console.log(`keyOptions: ${JSON.stringify(keyOptions)}`);
+}
 try {
-  inputConsumer.on("key", {preKeys: [leftAltKey], finalKey: tabKey, isFinalKeyDown: true, finalKeyDownDuration: 0}, keyOptions => {
-    console.log(`keyOptions: ${JSON.stringify(keyOptions)}`);
-  });
+  inputConsumer.on("key", keyOptions, callback);
 } catch (error) {
   console.log(`Subscribe failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
 }
@@ -70,10 +77,10 @@ off(type: "key", keyOptions: KeyOptions, callback?: Callback<KeyOptions>):
 let leftAltKey = 2045;
 let tabKey = 2049;
 // 取消订阅单个回调函数
-let callback = function (keyOptions) {
+let callback = (keyOptions: inputConsumer.KeyOptions) => {
   console.log(`keyOptions: ${JSON.stringify(keyOptions)}`);
 }
-let keyOption = {preKeys: [leftAltKey], finalKey: tabKey, isFinalKeyDown: true, finalKeyDownDuration: 0};
+let keyOption: inputConsumer.KeyOptions = {preKeys: [leftAltKey], finalKey: tabKey, isFinalKeyDown: true, finalKeyDownDuration: 0};
 try {
   inputConsumer.on("key", keyOption, callback);
   inputConsumer.off("key", keyOption, callback);
@@ -86,10 +93,10 @@ try {
 let leftAltKey = 2045;
 let tabKey = 2049;
 // 取消订阅所有回调函数
-let callback = function (keyOptions) {
+let callback = (keyOptions: inputConsumer.KeyOptions) => {
   console.log(`keyOptions: ${JSON.stringify(keyOptions)}`);
 }
-let keyOption = {preKeys: [leftAltKey], finalKey: tabKey, isFinalKeyDown: true, finalKeyDownDuration: 0};
+let keyOption: inputConsumer.KeyOptions = {preKeys: [leftAltKey], finalKey: tabKey, isFinalKeyDown: true, finalKeyDownDuration: 0};
 try {
   inputConsumer.on("key", keyOption, callback);
   inputConsumer.off("key", keyOption);