Function.prototype.toSource()

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The toSource() method returns a string representing the source code of the object.

Syntax

JavaScript
<var>function</var>.toSource();
Function.toSource();

Return value

A string representing the source code of the object.

Description

The toSource method returns the following values:

  • For the built-in Function object, toSource() returns the following string indicating that the source code is not available:
    JavaScript
    function Function() {
        [native code]
    }
  • For custom functions, toSource() returns the JavaScript source that defines the object as a string.

This method is usually called internally by JavaScript and not explicitly in code. You can call toSource while debugging to examine the contents of an object.

Specifications

Not part of any standard. Implemented in JavaScript 1.3.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support (Yes) ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? (Yes) ? ? ?

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/function/tosource

Function JavaScript Method