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

Modifying an element in the list

Modifying a list element is done in several steps:

  1. Following a click on the Modify button, we transform the text of the list element (currently a <span> element) into an HTML <input> element initialized with the text of the element.
  2. Then we manage the exit of the input field, by retrieving the value entered in the field, then by replacing the input field with a <span> element with the new content.
  3. Finally, we improve the input by allowing the input control to automatically have the focus after clicking on the Modify button.

Let’s see these different steps in depth.

Transforming the <span> element into an <input> element

The first step is to transform the <span> element into an <input> element, which will allow the text of the element to be modified. To do this, we will add a new reactive variable (named "input") in the <Element> component. It indicates whether...