Book Image

Mobile Web Performance Optimization

By : S. S. Niranga
Book Image

Mobile Web Performance Optimization

By: S. S. Niranga

Overview of this book

With users increasingly accessing the web on mobile devices, it’s crucial to make sure your website is built to seamlessly fit this radical change in user behavior. Mobile Web Performance Optimization is designed to help you do exactly that – it’s been created to help you build fast, and mobile-user-friendly websites and applications. Featuring guidance through a range of techniques and tools essential to modern mobile development, this accessible guide will make sure you’re delivering a seamless and intuitive experience for your website’s users. Begin by exploring the fundamental components of mobile web design and website optimization, before learning how to put the concepts into practice. Featuring cross-platform solutions, insights on developing lightweight yet robust UI, and insights on how to successfully manage data, this application development book takes you through every stage in the development process – so you can be confident that you’re asking the right questions and using the best tools in the most effective way. By the end, you’ll understand implicitly what it means to ‘build for performance’- you’ll be a more confident developer, capable of building projects that adapt to a changing world.
Table of Contents (14 chapters)
Mobile Web Performance Optimization
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Opening connection


When you load a JavaScript file synchronously in the Head tag of an HTML page, other requested files have to wait until the JavaScript file gets downloaded. This is more visible to the end-user because, he cannot see any content until all the files in the HEAD area get downloaded. However, using the asynchronous method to download the file we can resolve this issue to some extent.

When we specify JavaScript files to be loaded in the HEAD section of the HTML, it is essential to know the two different ways that we can use to load the data, which are as follows:

  • Synchronous: The requested file will load before the parsing of the page continues

  • Asynchronously: The other requested files will be downloaded parallel to the requested file

So, the best practice will be the JavaScript files located in the HEAD section of the HTML file load asynchronously. By doing so, we can eliminate page rendering delays.