Could someone please give me a brief introduction to lexical scoping?...
I know that 'this' in JavaScript has a different meaning than in in TypeScript, as per this article 'this' in TypeScript. I have the following code in JavaScript used to create a thicker stroke on the selected node, and give all oth...
I have an ids object, which maps id strings to product objects.  for id of ids   product = ids[id]   console.log product # Prints out something different each loop. :)   Product.create(product).then ->     console.log product # Only prints out the...
From You Don't Know JS:  for (var i=1; i<=5; i++) {     setTimeout( function timer(){         console.log( i );     }, i*1000 ); }   gives  6 6 6 6 6   but using an IIFE like so  for (var i=1; i<=5; i++) {     (function(){         var j = i...
While looking into ES6 arrow functions' documentation on Mozilla documentation, I got to know that Arrow functions applies all the rules of strict mode, except one as described in the link        var f = () => { 'use strict'; return t...
I understand that there is global scope, and additionally nestable functional scope.  But are there any other types of scopes or closures in Javascript?  While we're on the topic, what's the difference between a scope, and a closure?...
Normally I'd assign an alternative "self" reference when referring to "this" within setInterval. Is it possible to accomplish something similar within the context of a prototype method? The following code errors.  function Foo() {...
When I open jQuery's source code I find this line.  var  // Will speed up references to window, and allows munging its name. window = this   Why and how this line will speed up?...
I was trying to understand lexical scoping in Javascript. In the below example, I have written a function inside an another function. When I run this, I would expect to pop-up "dad" in the first alert and "mom" in the second alert. Bu...
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