Is it better to have multiple JS files?
Separating code into multiple files helps immensely for several reasons. It makes code easier to maintain as long as it is separated into logical groups. That goes for maintenance by you or anyone else. Having multiple files will make each one shorter.
Edit: To answer further No, there are no limits on the number of files, but most browsers can only have 2 connections (for a site) to a web server at any one time and thus will load your js 2 files at a time.
How do I merge HTML and CSS files?
Use <style type=”text/css”></style> in your header tag to merge the css and html into one file. Then paste your css in between the style tags.
How big should a JS file be?
Embrace performance budgets and learn to live within them. For mobile, aim for a JS budget of < 170KB minified/compressed. Uncompressed this is still ~0.7MB of code. Budgets are critical to success, however, they can’t magically fix perf in isolation.
There are two ways, with best practices for each:
- Make JS load faster in the browser. Reduce how much JS you use to build your page. Minify all JS resources, and use minified third-party JS. …
- Only load JS when it’s needed. Eliminate dead JS code. Split JS files to deliver essential components.
Do I need to keep .JS files?
For development you should keep them separate. For production using build tool join them so there is only one http request for entire js file can be a solution. All js are used on all page? It’s usually better to only load what you need.