I would like to ask why my state is not changing when I do an onclick event. I've search a while ago that I need to bind the onclick function in constructor but still the state is not updating. Here's my code:  import React from 'react&...
I haven't seen this syntax before and am wondering what it's all about.   var { Navigation } = require('react-router');   The brackets on the left are throwing a syntax error:     unexpected token {   I'm not sure what part of t...
I've heard that accessing let and const values before they are initialized can cause a ReferenceError because of something called the temporal dead zone.  What is the temporal dead zone, how does it relate to scope and hoisting, and in what sit...
I have been reading a bunch of react code and I see stuff like this that I don't understand:  handleChange = field => e => {   e.preventDefault();   /// Do something here }...
Using ES6 arrow functions with lexical this binding is great.  However, I ran into an issue a moment ago using it with a typical jQuery click binding:  class Game {   foo() {     self = this;     this._pads.on('click', function() {       if...
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I understand that let prevents duplicate declarations which is nice.  let x; let x; // error!   Variables declared with let can also be used in closures which can be expected  let i = 100; setTimeout(function () { console.log(i) }, i); // '100&...
Currently in ES5 many of us are using the following pattern in frameworks to create classes and class variables, which is comfy:    // ES 5 FrameWork.Class({      variable: 'string',     variable2: true,      init: function(){      },...
In a project I'm collaborating on, we have two choices on which module system we can use:   Importing modules using require, and exporting using module.exports and exports.foo. Importing modules using ES6 import, and exporting using ES6 export...
I have a loop which calls a method that does stuff asynchronously. This loop can call the method many times. After this loop, I have another loop that needs to be executed only when all the asynchronous stuff is done. So this illustrates what I wan...

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