已废弃的 `unescape()` 方法计算生成一个新的字符串，其中的十六进制转义序列将被其表示的字符替换。上述的转义序列就像`escape`里介绍的一样。因为 `unescape` 已经废弃，建议使用 `decodeURI`或者`decodeURIComponent` 替代本方法。

注意：不要使用`unescape`去解码URLS，使用`decodeURI`替代。

## 语法

    unescape(str)

### 参数

`str`
  被编码过的字符串。

### 返回值

  一个未被转义的新字符串。

## 描述

`unescape`函数是全局对象的一个属性。

## 示例

    unescape('abc123');     // "abc123"
    unescape('%E4%F6%FC');  // "äöü"
    unescape('%u0107');     // "ć"

## 规范

Specification | Status | Comment
--- | --- | ---
ECMAScript 1st Edition (ECMA-262) unescape | Standard | Initial definition.
ECMAScript 5.1 (ECMA-262) unescape | Standard | Defined in the (informative) Compatibility Annex B
ECMAScript 2015 (6th Edition, ECMA-262) unescape | Standard | Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers
ECMAScript Latest Draft (ECMA-262) unescape | Draft | Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers

## 浏览器兼容

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

| Desktop | Mobile | Server
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet | Node.js
`unescape` Deprecated | Chrome Full support Yes | Edge Full support Yes | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes | nodejs Full support Yes

### Legend

Full support
  Full support
Deprecated. Not for use in new websites.
  Deprecated. Not for use in new websites.

## 相关链接

- `decodeURI`
- `decodeURIComponent`
- `escape`