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 array.



Return value

A string representing the source code of the array.


The toSource method returns the following values:

  • For the built-in Array object, toSource returns the following string indicating that the source code is not available:
    function Array() {
        [native code]
  • For instances of Array, toSource returns a string representing the source code.

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 array.


Examining the source code of an array

To examine the source code of an array:

var alpha = new Array('a', 'b', 'c');

//returns ['a', 'b', 'c']


Not part of any standard. Implemented in JavaScript 1.3.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No No1 No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No No4 No No No

See also

Document Tags and Contributors

Last updated by: fscholz,