I want to do the opposite of Get JavaScript function-object from its name as a string?
That is, given:
function foo()
{}
function bar(callback)
{
var name = ???; // how to get "foo" from callback?
}
bar(foo);
How do I get the name of the function behind a reference?
If you can't use myFunction.name
then you can:
// Add a new method available on all function values
Function.prototype.getName = function(){
// Find zero or more non-paren chars after the function start
return /function ([^(]*)/.exec( this+"" )[1];
};
Or for modern browsers that don't support the name
property (do they exist?) add it directly:
if (Function.prototype.name === undefined){
// Add a custom property to all function values
// that actually invokes a method to get the value
Object.defineProperty(Function.prototype,'name',{
get:function(){
return /function ([^(]*)/.exec( this+"" )[1];
}
});
}