I do not fully understand why the following displays "hoisted" towards the end.   var x = 'set'; var y = function ()  {     // WHAT YOU DON'T SEE -> var x;      // is effectively "hoisted" to this line!      if (!x)...
As I understand it, the IIFE pattern is a work around to the fact that ES5 and below do not have a way to create block scopes.  By wrapping everything in a function and immediately invoking it, we can create a scope.  Now that let and const will ga...
I've been learning a lot of Javascript lately and I've been trying to understand the value (if there is any) of hoisting variables.  I understand (now) that JS is a two pass system, it compiles and then executes. Also, I understand that the v...
I know that the "execution" in JavaScript happens in 2 phases:  1) The Creation phase when the functions and variables are added in the memory, hoisting,the this is create and outer environment  2) The second phases when the code is executed....
I read the concept of Javascript Hoisting.Its pretty confusing but I saw some examples and got the idea what hoisting actually does.  So basically "Hoisting is JavaScript's default behavior of moving all declarations to the top of the current...
Consider the following excerpt from ECMA-262 v5.1 (which I recently saw in this question):     A Lexical Environment is a specification type used to define the association of Identifiers to specific variables and functions based upon the lexical nest...
I was trying to understand the scope in JavaScript. If I declare a variable outside of a function, it is GLOBAL. Hence I tested the following code to understand sequence of execution. In the following code, I expected the "demo1" to take the...
If we declare a variable and a function with same name, it is accepting re-declaration. But when we do the same thing inside a block, it shows re-declaration error. Code:    var x; function x() {}; // no error.     But in this case i'm getting Er...
david sharif made a JS quiz which pretty much looks like-  var foo=1;      function bar(){   return foo;   foo=10;   function foo(){}   var foo =5; }  typeof bar();//?   In my understanding, functions are hosited first and then variable declared insi...
Someone please help me understand the following scenario:    //Outer funtion  function foo() {   console.log('outer foo'); }  {   //Inner function   function foo() {     console.log('inner foo');   } }  foo(); //Says "inner foo...

Tags

Recent Questions

Top Questions

Home Tags Terms of Service Privacy Policy DMCA Contact Us

©2020 All rights reserved.