概述
调用任何一个可用的调试器,如果没有调试器可用,则该语句没有任何效果.
语法
debugger;例子
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 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. |
浏览器兼容性
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |