debugger

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

SpecificationStatusComment
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.StandardInitial 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.StandardOnly mentioned as reserved word.

浏览器兼容性

FeatureChromeEdgeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)

FeatureAndroidChrome for AndroidEdgeFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)