How many ways are there to see all properties that you manually add to the function? JavaScript. JS

Question

In JavaScript functions are first-class objects, that means you can treat them just like any object, in this case, you are only adding a property to the function object.

Ok, let's add some properties to a function.

  function a() {
    a.firstProp = "I'm 1st - property";
  }

  a.seccondProp = "I'm 2st - property";

  function b() {
    a();
  }

  b(); // initialize 1st property (firstProp)  for `function a`;

  console.log( Object.getOwnPropertyNames(b) );
  console.log( Object.getOwnPropertyNames(a) );

How can I see in Chrome DevTools a key-value pair that I added to the function in code example?

Answer 1

  Console.log( Object.keys(a) );