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 object.



Return value

A string representing the source code of the object.


Native function

For the built-in Number object, toSource() returns the following string indicating that the source code is not available:

function Number() {
    [native code]

For instances of Number, toSource() returns a string representing the source code.

This method is usually called internally by JavaScript and not explicitly in web code.


Not part of any standard.

Browser compatibility

BCD tables only load in the browser

See also