Tips to Optimize JavaScript for Improving Website Load Time & Rendering Speed
Optimize JavaScript
JavaScript is a really great tool for front-end development, for the creation of interactive & rich websites, and for the development of fast & smooth web apps. Every such developer knows JavaScript, but if used without care & expertise, this can cause great damage than good! Poorly written codes can slow down the site speed, and also negatively affect load times as well as rendering speed.
Some Tips for Optimizing JavaScript to Improve Website Load Times and Rendering Speed
- Elements Loading Queue: First and foremost, it is crucial that all elements in the section of <head> have been preloaded before any visitor views something in that browser, and only after that all the successive elements are then logically told to load. Any JavaScript in this section of <head> may make page rendering sloggish.
- Minifying JavaScript for Small Files: Code minification is dissimilar to code obfuscation, but both of these are the ways methods of modifying JavaScript to make it heavier or smaller. Minifying JavaScript can help in achieving the latter & shrinking file sizes for diminishing page loading time.
- JavaScript Optimization Using Minification: Optimization is a superior way of minifying JavaScript. Such types of minifiers tend to remove unnecessary spaces, commas, comments, etc.; and also help in avoiding “dead code” too. Such minifiers are given under:
- UglifyJS
- Microsoft AJAX Minifier
- Google Closure Compiler
- Asynchronous Loading of Defer & Asynchronous Tags: Asynchronous loading in JavaScript is a type of synchronous loading. This implies that your site will load in multiple ways. When any browser encounters the string with <script src=”some.js”></script>, it stops generating DOM model & CSSOM model when the JavaScript has been executed. Therefore, most of the JavaScript code is found in succession of the main HTML code.
- Don’t Include Unused Component(s) from the .js Library: Many web developers tend to use libraries like jQuery UI/jQuery Mobile natively, which implies that the code would be including every possible component of these libraries, when you might need just 2 or 3. A same type of situation may occur in other JavaScript libraries too. If you have the option to control which components are included in your library package, then do so completely. Your site would load quickly and also your site visitors would have a better UX.
- Try Using HTTP/2 Protocol: This other encrypted version of the chief Internet protocol could possibly give you many great features, such as asynchronous loading of external files, especially JavaScript. Although HTTP needs extensive learning and a deeper understanding of theoretical JavaScript, HTTP/2 can really speed up JavaScript loading.
Avail of Legacit’s Expert Services for JavaScript Optimization
If you’re looking for expert services to optimize your JavaScript code, look no further than Legacit. Our team of experts can help you improve the performance of your code and make it more efficient. We can also help you troubleshoot any issues you may be having with your JavaScript code. Contact us today to learn more about our services and how we can help you take your code to the next level.