debugger 语句调用任何可用的调试功能，例如设置断点。 如果没有调试功能可用，则此语句不起作用。
语法
debugger;
示例
下面的例子演示了一个包含 debugger 语句的函数，当函数被调用时，会尝试调用一个可用的调试器进行调试。
function potentiallyBuggyCode() {
debugger;
// do potentially buggy stuff to examine, step through, etc.
}当 debugger 被调用时, 执行暂停在 debugger 语句的位置。就像在脚本源代码中的断点一样。
规范
| Specification | Status | Comment |
|---|---|---|
| ECMAScript Latest Draft (ECMA-262) Debugger statement |
Draft | |
| ECMAScript 2015 (6th Edition, ECMA-262) Debugger statement |
Standard | |
| ECMAScript 5.1 (ECMA-262) Debugger statement |
Standard | Initial definition |
| ECMAScript 3rd Edition (ECMA-262) Debugger statement |
Standard | |
| ECMAScript 1st Edition (ECMA-262) Debugger statement |
Standard | Only mentioned as reserved word. |
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 | iOS Safari | Samsung Internet | Node.js | |
| Basic support | 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