How to shrink font-awesome to use only few icons

If you use font-awesome, and you don't like to load 80kb+ for few icons, this guide is for you. Caution: I'm mostly php developer, so this guide is without advanced js stuff.

We will use https://github.com/omacranger/fontawesome-subset to do this

1. Install node.js if you don't have
2. Install fontawesome-subset npm install --save-dev fontawesome-subset
3. Install fontawesome npm install --save-dev @fortawesome/[email protected]

Note: we use 5.15.4 version because it is much more simple and lighter.
Create file fas.js. It will generate optimized font files.
Also, it will create file my_icons.html with html that uses classes. It is needed for css purge.
Edit arrays regularArray and solidArray to include icons you need.

//fa.js
const { fontawesomeSubset } = require("fontawesome-subset");
const fs = require('fs');
const regularArray = [
 "star",
 "envelope",
];

const solidArray = [
"star",
"search",
];


fontawesomeSubset(
 {
  regular: regularArray,
  solid: solidArray,
 },
 "fa_subset_files/fa/webfonts"
);
let html = '';
regularArray.forEach(icon => {
 html += '<i class="far fa-' + icon + '"></i>';
});
solidArray.forEach(icon => {
 html += '<i class="fas fa-' + icon + '"></i>';
});

fs.writeFile('./fa_subset_files/my_icons.html', html, function (err) {
 if (err) throw err;
 console.log('It\'s saved!');
});

For second file we need:

1. Copy file node_modules\@fortawesome\fontawesome-free\css\all.css to our folder fa_subset_files
2. Run npm install purify-css
3. Create folder fa_subset_files/css

Now we ready to make script that will optimize css.

//facss.js
const purify = require("purify-css");

const content = ["./fa_subset_files/my_icons.html"];

purify(content, ["./fa_subset_files/all.css"], {
  minify: true,
  output: "./fa_subset_files/fa/css/min.css"
});

So to create icons, we need:

1. Edit fa.js to have icons in arrays regularArray and solidArray
2. run node fa.js
3. run node facss.js

Copy your folder /fa_subset_files/fa/ to your website.

I know this is lame, but I'm not in this js ecosystem. This works for me.