Function caller and argumentsLimited availability
The caller and arguments properties of a non-strict mode Function object are the function that called it and the arguments it was called with. Not to be confused with the arguments variable in a function body's local scope.
Not yet supported in all major browsers — check the table and provide a fallback.
Discouraged: JavaScript strict mode prohibits accessing the caller and arguments properties of a Function object.
Browser support
DesktopChrome
1+Supportedsince Dec 11, 2008
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1+Supportedsince Nov 9, 2004
Current: 157Safari
1–2Not supported
3+Supportedsince Oct 26, 2007
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4+Supportedsince Mar 29, 2011
Current: 157Safari iOS
1+Supportedsince Jun 29, 2007
Current: 27How to use
Support is still inconsistent across browsers. Use feature detection and test carefully.
Example
Full syntax and examples are on MDN: arguments.
Feature detection
JS · check before using
if ("arguments" in Function || ("prototype" in Function && "arguments" in Function.prototype)) {
// Function.arguments is available
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (2). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| Function.arguments | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Function.caller | 1 | 12 | 1 | 3 | 18 | 4 | 1 |