Book Image

JavaScript from Frontend to Backend

By : Eric Sarrion
Book Image

JavaScript from Frontend to Backend

By: Eric Sarrion

Overview of this book

JavaScript, the most widely used programming language in the world, has numerous libraries and modules and a dizzying array of need-to-know topics. Picking a starting point can be difficult. Enter JavaScript from Frontend to Backend. This concise, practical guide will get you up to speed in next to no time. This book begins with the basics of variables and objects in JavaScript and then moves quickly on to building components on the client-side with Vue.js and a simple list management application. After that, the focus shifts to the server-side and Node.js, where you’ll examine the MVC model and explore the Express module. Once you've got to grips with the server-side and the client-side, the only thing that remains is the database. You’ll discover MongoDB and the Mongoose module. In the final chapter of this fast-paced guide, you'll combine all these pieces to integrate a Vue.js application into a Node.js server, using Express to structure the server code and MongoDB to store the information. By the end of this book, you will have the skills and confidence to successfully implement JavaScript concepts in your own projects and begin your career as a JavaScript developer.
Table of Contents (14 chapters)
1
Part 1: JavaScript Syntax
4
Part 2: JavaScript on the Client-Side
8
Part 3: JavaScript on the Server-Side

Managing events

Now let’s see how to handle events with Vue.js. To do this, use the v-on directive, followed by the character : and the name of the event to be handled. For example, if you want to perform a particular process when a button is clicked, we will use the click event on the button and we will write v-on:click to handle the click event. The value of the directive (which follows the = sign) corresponds to the JavaScript expression to be executed (either a statement or a function call).

Tip

Vue.js makes it easier to write v-on:click by writing @click more simply. This rule is valid for all events.

In this example, we will implement a button that increments a reactive variable count on each click. We will also define an incr() method in the methods section of the component that increments the count variable:

Increment counter count (counter.js file)

const Counter = {
  data() {
    return {
      ...