debugger
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)The definition of 'Debugger statement' in that specification. | Draft | |
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'Debugger statement' in that specification. | Standard | |
ECMAScript 5.1 (ECMA-262)The definition of 'Debugger statement' in that specification. | Standard | Initial definition |
ECMAScript 3rd Edition (ECMA-262)The definition of 'Debugger statement' in that specification. | Standard | |
ECMAScript 1st Edition (ECMA-262)The definition of 'Debugger statement' in that specification. | Standard | Only mentioned as reserved word. |
浏览器兼容性
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
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