I don't understand writable and configurable property attributes of Objects

Question

I don\'t understand the Writable and Configurable attributes of Objects. For example, in the MDN for Object.prototype, there is a table where I can clearly see that Configur

Answer 1

The Writable, Enumerable and Configurable attributes in MDN appear to be about the Object.prototype object itself, not its properties.

So, what that means is that you can't replace Object.prototype with a different object, but you are allowed to add properties to it.

So, what that means is if you do this:

Object.prototype = {foo: "whatever"};   // doesn't work - is just ignored
var j = {};
console.log(j.foo);   // undefined

Then, the first line of code won't do anything.