Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

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:

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

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


Not part of any standard. Implemented in JavaScript 1.3.

Browser compatibility

BCD tables only load in the browser

See also