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    debugger

    Summary

    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;

    Examples

    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.

    Paused at a debugger statement.

    Specifications

    Specification Status Comment
    ECMAScript 1st Edition. Standard Initial definition.
    ECMAScript 5.1 (ECMA-262)
    The definition of 'Debugger statement' in that specification.
    Standard  
    ECMAScript 6 (ECMA-262)
    The definition of 'Debugger statement' in that specification.
    Draft  

    Browser compatibility

    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)

    See also

    Document Tags and Contributors

    Contributors to this page: evilpie, Sheppy, Waldo, fscholz, Meghraj, fitzgen, ethertank, Havvy, Mkmelin, Potappo
    Last updated by: fscholz,
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