Function.prototype.toSource()

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

Syntax

function.toSource();

Return value

A string representing the source code of the object.

Examples

Native functions

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

function Function() {
  [native code]
}

Custom functions

For custom functions, toSource() returns the JavaScript source that defines the object as a string.

// For example:
function hello() {
  console.log("Hello, World!");
}

hello.toSource();

// Results in:
"function hello() { 
    console.log(\"Hello, World!\");
}"

Specifications

Not part of any standard.

Browser compatibility

See also

• Object.prototype.toSource()