javascript - Everything is an object?

Question

At one popular blog, the author asked his audience what was their “Ah ha!” moment for JavaScript and most of the people said that it was realizing that everything in JavaScript is an object. But being new to JS and programming in general I don't quite get what that means. It doesn't seam like it's related to actual JS Object - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object

Or it does?

If it doesn't could you please explain what do they mean by "everything in JavaScript is an object".

Or it's all about OO Programming in general and reading something on this subject will help to understand it? Can you recommend what to read on this topic?

Answer 1

Go back to first principles.

What's an object? It's a software component that encapsulates state and behavior together into a single entity in memory.

By that definition, you can see where everything can be thought of as an object. Functional programmers make functions first class objects. Data folks would say that data, even that without behavior, can be thought of as an object (albeit not a very smart one).

I don't see what this changes.

JavaScript treats functions as objects.

I'm not sure what effect this insight will have on your programming.