{{jsSidebar("Statements")}}
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.
Specifications
Specification | Status | Comment |
---|---|---|
{{SpecName('ES6', '#sec-debugger-statement', 'Debugger statement')}} | {{Spec2('ES6')}} | |
{{SpecName('ES5.1', '#sec-12.15', 'Debugger statement')}} | {{Spec2('ES5.1')}} | Initial definition |
{{SpecName('ES3', '#sec-7.5.3', 'Debugger statement')}} | {{Spec2('ES3')}} | |
{{SpecName('ES1', '#sec-7.4.3', 'Debugger statement')}} | {{Spec2('ES1')}} | Only mentioned as reserved word. |
Browser compatibility
{{CompatibilityTable}}
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} |