debugger

The debugger statement invokes any available debugging functionality, such as setting a breakpoint. If no debugging functionality is available, this statement has no effect.

Syntax

debugger;

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Examples

Using the debugger statement

The following example shows code where a debugger statement has been inserted, to invoke a debugger (if one exists) when the function is called.

function potentiallyBuggyCode() {debugger;// do potentially buggy stuff to examine, step through, etc.}

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When the debugger is invoked, execution is paused at the debugger statement. It is like a breakpoint in the script source.

Specifications

SpecificationECMAScript Language Specification (ECMAScript)
# sec-debugger-statement

Browser compatibility

Report problems with this compatibility data on GitHub

desktopmobileserver
ChromeEdgeFirefoxInternet ExplorerOperaSafariWebView AndroidChrome AndroidFirefox for AndroidOpera AndroidSafari on iOSSamsung InternetNode.js

debugger

Full support5Full support12Full support1Full support4Full support10Full support5Full support1Full support18Full support4Full support10.1Full support4.2Full support1.0Full support0.10.0