JavaScript Closures in FIVE Minutes 

I think the addition to lexical scope here is the fact that the function isn’t called immediately. It’s called at some later time and still has access to the variables. Lexical scope would more specifically refer to the case where you are accessing the data right then (not at a later point) I believe.

The best usage of closures is to create private variables I think.

@@rafalka7084 encapsulation would be the better term but yeah

Yes you're right, you also need to understand the concept of the call stack and function execution contexts and how these two are *determined dynamically* by how the function is *called* at runtime, as opposed to how lexical scope is *determined statically* by where the function is *defined* (in the code) at compile time. This is important as you'll often see popular articles mix up the terms, execution context and scope, which will get really confusing as you try to understand how it all works under the hood of the JavaScript engine/interpreter.

Yeah I mean that's basically the same thing here. Any time something is referenced inside of a function that isn't called until later, the fact that it keeps the reference is it.

If it’s inside of the for each yes you are correct!

WOw, so glad to hear that!

I was scrolling the comment to see who has asked the theme question. It's beautiful. James, I need it too. Thanks for your videos.

I use the font Cascadia Code. I’m using VS Code with the Cobalt 2 Theme. It's in the Advent Page he mentioned, worth checking.

I think I found it - Midnight Synth

Glad you liked it!

Glad you enjoyed it!

Found it - Midnight Synth

I use the font Cascadia Code. I’m using VS Code with the Cobalt 2 Theme. It's in the Advent Page

Hmm anything you’d like to add or clarify?

​@@JamesQQuick In a foreach loop, in each iteration, the index is accessed from the inner function simply by the rules of scope. Function scope - meaning everything inside has access to it. Closure: an inner function always has access to the variables and parameters of its outer function (Yes), and the mind blowing fact is when it's in a situation after the outer function has already returned. But the values are remembered to be accessed after the outer fn return. The magic point of it. ) So the idea of private variables comes from this magic feature. I've seen examples of it where it was difficult to wrap my mind around it. Sorry for the confusion. It's true what the video described. But just there are deeper meanings I believe.

@@lexsemenenko I appreciate the detailed response. Agreed there are deeper implications and use cases than what's covered in the quick video

Glad that helped!!