HTML, JavaScript and CSS Minification – The Ultimate Guide

  • Posted by IMS
  • Categories SEO
  • Date November 10, 2021
HTML, JavaScript and CSS Minification
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Websites have been utilizing HTML, JavaScript and CSS for many years. However, it has been noted that the more you insert them into your website, the slower the website will perform. 

This calls for the need for Minification. 

This programming process incorporates analyzing a site’s text to lessen each page’s file size. After all, the smaller the file size, the faster it will load. 

The Minification process does not impact the function of the file. Instead, it optimizes it for download purposes. 

File modifications are usually not made directly in production. Thus, the need for a visually appealing code is not felt. 

Google does take a website’s speed into account while ranking. In this regard, Minification does help improve your website’s speed making both your site’s visitors and Google happy. 

 

What does HTML, JavaScript and CSS Minification mean? 

Reducing HTML, JavaScript, and CSS file size is a critical part of improving the speed of your website. 

It involves removing any avoidable characters from within a file to reduce the file size and make it load quicker. Here are the aspects that get removed during file Minification: 

  • Line breaks
  • Block delimiters
  • Comments
  • Whitespace characters

 

How does Minification work? 

When you will practice Minification, you will require to follow 3 steps: 

  • The developer codes the CSS or JS file using good programming practices. It includes leaving blank spaces that make the file easy to read, inserting comments where necessary, and much more.

 

  • Then, the developer utilises several Minification techniques to optimize the file. This makes the file size smaller and makes it easy to read as Minification removes unnecessary things. 

 

  • At last, the minified page gets uploaded to the server. If somebody loads the website, it’s this minified page that is retrieved. This, in turn, allows the page to load quicker and use less bandwidth. 

The individual loading for these minified pages does not need to view any of the source code at all. 

 

Tools required for HTML, JavaScript and CSS Minification

Various tools are available on the internet for Minification. (Some of them are even free to use). They broadly fall under these 3 categories: 

  • Online Minification tools

 

For HTML, JavaScript and CSS: minify code

For CSS: clean css

JavaScript: js compress

 

They all are easy to use. Just insert a code file in them and receive a minified version in return. 

 

  • Automated tools

 

Here, you can use NitroPack to optimize your website’s code files. 

 

This is what NitroPack does to reduce HTML, CSS, and JavaScript files: 

 

  • Compression and Minification: NitroPack applies both tactics automatically. Minification is performed on AST Trees and not regexes, offering the finest results in terms of code size and stability. 

 

  • Intelligent CSS and JavaScript combining:  This combines CSS files by default. One can also use it to combine JavaScript files. However, that option isn’t enabled by default. 

 

  • Command-line tools 

 

These tools are recommended by Google a time ago: 

 

  • For HTML Minification: HTMLMinifier
  • For CSS Minification: CSSNano and csso
  • For JavaScript Minification: UglifyJS

 

Except for HTMLMinifier, these tools are updated regularly. They will be fine to test and to be used. 

 

How to minify HTML, JavaScript and CSS? 

As already mentioned, there are several tools that you can utilize to minify HTML, JavaScript and CSS. 

While some tools focus on a particular file type such as CSS or JavaScript, others are capable of performing Minification on various file types. 

However, online-based development tools are not the only possibilities available for Minification. 

Many Content Management Systems also offer plugins and extensions to minify CSS, JavaScript, and HTML. 

There are 3 different techniques developers use to minify web pages. Each of these techniques aims to minify HTML, JavaScript and CSS. 

HTML Minification can be done using Google’s PageSpeed Insights extension for chrome. It even has a command to minify HTML. Just click on that option to minify the HTML code of the page. 

 

Difference between Minification and Compression

Users mostly confuse Minification and Compression. Both tactics essentially offer the same benefit; reducing the file’s size. 

Although, there’s a central difference between the two. 

Minification removes the redundant data from a file. On the other hand, Compression rewrites the files’ binary code and encodes the information using fewer bits than the original. 

Compression is utilised to reduce the file size using a compression scheme or method, such as Gzip and Brotli. In addition, files are compressed before they are sent from the browser to the client. 

It works as follows: 

  • JavaScript, CSS, and HTML files are compressed.  
  • A request is made from a client (browser) for the compression version of the files. 
  • The compressed files are sent from the web hosting server to the clients 
  • The client then decompresses the file and renders the information to the browser. 

The compression method varies from server to server and client to client. 

 

Final words

If you wish to load your websites faster and with better performance marks, you need to minify HTML, CSS and JavaScript. And with all the tools available, one can minify your code for your website. 

Especially for WordPress users, there are few relevant plugins available to minify those files automatically. 

Hence, decide the best option for yourself and give your web pages an edge over your competitors.


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