Web platform features explorer - Function caller and arguments

This feature is discouraged — JavaScript strict mode prohibits accessing the caller and arguments properties of a Function object.

For more information, see: https://tc39.es/ecma262/multipage/error-handling-and-language-extensions.html#sec-forbidden-extensions

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.

Status

Discouraged

MDN documentation

Function.prototype.caller
Function.prototype.arguments

Specifications

ECMAScript® 2026 Language Specification (#sec-forbidden-extensions), from TC39 (Ecma International).

Browser support

Chrome 1 Released on 2008-12-11
Chrome Android 18 Released on 2012-06-27
Edge 12 Released on 2015-07-29
Firefox 1 Released on 2004-11-09
Firefox for Android 4 Released on 2011-03-29
Safari 3 Released on 2007-10-26
Safari on iOS 1 Released on 2007-06-29

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