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

How to optimize JavaScript


Nowadays, we use JavaScript in our application or website to create visual effects. Sometimes, it creates these visual effects by manipulating styles or doing calculations such as sorting or searching. However, if we don't use these properly, JavaScript can cause performance issues on our website or application. To minimize these impacts on the website, you should consider the following:

  • Avoid using setTimeout or setInterval for visual updates. Instead of these you can use requestAnimationFrame.

  • Move long-running JavaScript main thread to Web workers.

  • Use browser development tools to profile JavaScript and assess the impact.

  • Use micro-tasks to make DOM changes rather than using several frames.

  • Keep your HTML code clean by removing unwanted DIV and SPAN tags.

  • When updating styles, do them as a batch.

  • Build DOM separately, before it is added to the page.

  • Remember to unbind events when they are no longer needed.

  • Learn about event bubbling. Use jQuery.bind() instead of jQuery...