How to understand as const? What does declare global mean? How to add a global variable to the TypeScript environment? Can interface be inherited? What does & mean in typescript? What is the difference between interface and type? What does enum mean as a type? What does the declare modul...
If you have a solid foundation in HTML, CSS, and particularly JavaScript, you can pick up the basics of React more quickly. JavaScript is especially crucial because React is a JavaScript library. The more you practice by building projects, the better you will understand and be able touse Rea...
See Allow captured let/const in loops Example See Example Improved checking for for..in statements See Improved checking for for..in statements Example See Example Modules are now emitted with a "use strict"; prologue See Modules are now emitted with a "use strict"; prologue Including .js fi...
Another problem with using object literals (pre-ES6), is property/key orders are not guaranteed. Just because you have added the keys in a certain order, does not mean they will remain in that order, when you iterate through the keys. var o = {}o.a = 1o.b = 2o.c = 3 for(key...
Alambda functionis simply an anonymous function. Consider this JavaScript example: const multiplyBy = x => { return y => x * y } const triple = multiplyBy(3); triple(10); // returns 30 Notice that the original function,multiplyBy, returns an (anonymous) function. This function has the...
Even more troubling, I discovered that my entire understanding of function names in JavaScript was completely wrong. After a few hours of existential thrashing (“What does it mean to have a name?”, “Am I a real boy?”, etc.), I decided to research the issue and learn the correct ...
const eventBus = new Vue() export default eventBus; After this, the next thing would be to import this file intomain.jsto make it globally available in our app or to import it in files that you need it; # main.js import eventBus from 'eventBus' ...
Okay, let me be slightly more nuanced about that statement: a few years ago Bootstrap had its merits (and I guess it still does). You can use it to quickly whip up a UI. I mean, it looks like every other UI you whipped up, but at least it isn’t totally horrible to look at....
If you are into front-end development, you’ve probably heard or read the term ‘Flux’. What does it mean and why should you care? Let’s get one misconception out of the way, Flux is not a framework. It is a design pattern, an idea. It describes how to manage state and how da...
constwait=time=>newPromise((resolve)=>setTimeout(resolve,time));wait(3000).then(()=>console.log('Hello!'));// 'Hello!' wait — promise example on CodePen Ourwait(3000)call will wait 3000ms (3 seconds), and then log'Hello!'. All spec-compatible promises define a.then()method...