JS SEO: The Definitive Guide

JS SEO: The Definitive Guide


JavaScript is an integral part of practically every webpage, mobile app, and web-based software. While JavaScript’s client-side scripting capabilities can make applications more dynamic and engaging, it also introduces the possibility of inefficiencies by relying on the user’s own browser and device. Consequently, poorly written JavaScript can make it difficult to ensure a consistent experience for all users.

2.Some common JavaScript Performance problems which will hurt your site ranking in SERP:

1.Too many interactions with the host

2.Too many dependencies

3.Poor event handling

4.Inefficient iterations

5.Unorganized code

3. Ways to optimize JS:

1.Eliminate render-blocking resources:


2.Minify your Javascript:

Bundling your application’s components into *.js files and passing them through a JavaScript minification program will make your code leaner.

Use online tools (https://jscompress.com/) or plugins to minify JS files.

3.Limit library dependencies:

Library dependencies add a lot to loading times, so strive to keep their use to a minimum, and avoid them entirely if at all possible. One way to reduce your dependency on external libraries is to rely more on in-browser technology.

4.Prefer Async and Defer:

If you want script tags to load asynchronously, or to defer until the rest of the page has finished loading, you can add the async or defer attributes:

// load example.js without interrupting your webpage’s rendering

<script src=”example.js” async></script>

// load example.js after the page has finished loading

<script src=”example.js” defer></script>

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