ES6 has a new kind of string literal, the template literal:// String interpolation via template literals (in backticks) const first = 'Jane'; const last = 'Doe'; console.log(`Hello ${first} ${last}!`); // Hello
This does not mean the value it holds is immutable—just that the variable identifier cannot be reassigned. For instance: const PI = 3.14; console.log(PI) //Prints 3.14 PI = 99; //TypeError: Assignment to constant variable. In the example above, the variable PI has been declared as a ...
Functional componentscan be defined using simple JavaScript functions that take props (properties) as input and return JSX (JavaScript XML) output that defines their structure and content. Class componentsare like special classes written in the ES6 version of Javascript built on the React. Class comp...
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. ...
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...
What are generic constraints in ts? Two ways to define an array type Type assertion in ts Generic functions and generic interfaces How to understand as const? What does declare global mean? How to add a global variable to the TypeScript environment?
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...
What does "object destructuring" mean and what is the result of a destructuring operation?THE SOLOPRENEUR MASTERCLASS Launching June 24th Say you have an object with some properties:const person = { firstName: 'Tom', lastName: 'Cruise', actor: true, age: 57 }...
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...
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' ...