The debugger
invokes any available debugging functionality, such as setting a breakpoint. If no debugging functionality is available, this statement has no effect.
debugger
Syntax
debugger;
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. }
When the debugger is invoked, execution is paused at the debugger
statement. It is like a breakpoint in the script source.
Specifications
Browser compatibility
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
debugger |
5
|
12
|
1
|
4
|
10
|
5
|
1
|
18
|
4
|
10.1
|
4.2
|
1.0
|
1.0
|
0.10.0
|
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/debugger