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 know that in the new ES6 module syntax, the JavaScript engine will not have to evaluate the code to know about all the imports/exports, it will only parse it and “know” what to load.  This sounds like hoisting. Are the ES6 modules hoisted? An...
function g () {     var x;     function y () {};     var z; }   I would like to know exactly what order the above code becomes when hoisted.  Theory 1: Order between vars and functions remains as-is:  function g () {     var x;     function y () {}...
function mymethod(){   alert("global mymethod"); }  function mysecondmethod(){   alert("global mysecondmethod"); }  function hoisting(){   alert(typeof mymethod);   alert(typeof mysecondmethod);    mymethod();         // local mymetho...
Consider the following code.  <!DOCTYPE html> <script>   console.log(a);   function a() {} </script>   Notice that a is seemingly accessed before it is defined. The console output is: (jsfiddle)  function a() {}   Function and varia...
I have this code:    (function() {    var ex;    try {        throw new Error('blah');    } catch(ex) {        console.log('ex i here:', ex);    }    console.log('ex out here:', ex);     return 'hi'; })()     This logs...
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 came across a interesting quiz  function bar() {     return foo;     foo = 10;     function foo() {}     var foo = '11'; } alert(typeof bar());   My interpretation is like this (Which is wrong according to console :) ):  var foo; // global...
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....

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