Get function object property from within function

Question

In JavaScript, functions can have properties. Like this:

var f = function(){ console.log("Hello!"); }
f.x = "Whoohoo";

How do I retrieve x from code within f() that might be called long after the variable f goes out of scope?

Answer 1

You could use the property accessor, like the assignment.

var f = function() { console.log("Hello! " + f.x); }
f.x = "Whoohoo";

console.log(f.x);
f();

For stable access, you could use a named function

var f = function foo() { console.log("Hello! " + foo.x); }
//               ^^^ >>>>>>>>>>>>>>>>>>>>>>>>>>> ^^^
f.x = "Whoohoo";

console.log(f.x);
f();