Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
The toSource() method returns a string representing the
source code of the object.
Syntax
booleanObj.toSource()
Boolean.toSource()Return value
A string representing the source code of the object.
Examples
Native function
For the built-in Boolean object, toSource returns the
following string indicating that the source code is not available:
function Boolean() {
[native code]
}
Specifications
Not part of any standard.
Browser compatibility
BCD tables only load in the browser