Book Image

Learning jQuery 3 - Fifth Edition

By : Jonathan Chaffer, Karl Swedberg
Book Image

Learning jQuery 3 - Fifth Edition

By: Jonathan Chaffer, Karl Swedberg

Overview of this book

If you are a web developer and want to create web applications that look good, are efficient, have rich user interfaces, and integrate seamlessly with any backend using AJAX, then this book is the ideal match for you. We’ll show you how you can integrate jQuery 3.0 into your web pages, avoid complex JavaScript code, create brilliant animation effects for your web applications, and create a flawless app. We start by configuring and customising the jQuery environment, and getting hands-on with DOM manipulation. Next, we’ll explore event handling advanced animations, creating optimised user interfaces, and building useful third-party plugins. Also, we'll learn how to integrate jQuery with your favourite back-end framework. Moving on, we’ll learn how the ECMAScript 6 features affect your web development process with jQuery. we’ll discover how to use the newly introduced JavaScript promises and the new animation API in jQuery 3.0 in great detail, along with sample code and examples. By the end of the book, you will be able to successfully create a fully featured and efficient single page web application and leverage all the new features of jQuery 3.0 effectively.
Table of Contents (23 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Providing flexible method parameters

In Chapter 7, Using Plugins, we saw some plugins that can be fine-tuned to do exactly what we want through the use of parameters. We saw that a cleverly constructed plugin helps us by providing sensible defaults that can be independently overridden. When we make our own plugins, we should follow this example by keeping the user in mind.

To explore the various ways in which we can let a plugin's user customize its behavior, we need an example that has several settings that can be tweaked and modified. As our example, we'll replicate a feature of CSS by using a more brute-force JavaScript approach--an approach that is more suitable for demonstration than for production code. Our plugin will simulate a shadow on an element by creating a number of copies that are partially transparent overlaid in different positions on the page:

(function($) {
  $.fn.shadow = function() {
    return this.each((i, element) => {
      const $originalElement = $(element);