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.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | Yes | Yes | 1 | Yes | Yes | Yes |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | Yes | Yes | Yes | 4 | Yes | Yes | Yes |