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

Using reactivity

One of the objectives of Vue.js is to separate the management of the display (the view) and that of the data (the model). This is the concept that is frequently found in what is called the Model View Controller (MVC) model.

To illustrate, suppose we want to display a counter that increments from 0. A good separation of view and model would be for the view to constantly display the value of the counter, even if that value is changed elsewhere. This concept makes it possible not to link the display with the management of the data displayed. For this, we use the reactivity offered by Vue.js, by creating so-called reactive variables.

Reactive Variables

A variable will be said to be reactive if its modification in memory causes it to be modified automatically wherever the variable is displayed.

Reactive variables are defined in the options object of the Vue.createApp(options) method. For this, we add in the options object, and the definition of the data() method...