In production, it is recommended to minify any JavaScript code that is included with your application. Minification can help your website load several times faster, especially as the size of your JavaScript source code grows.
Here's one way to set it up:
- Install Node.js
 - Run 
npm init -yin your project folder (don't skip this step!) - Run 
npm install terser 
Now, to minify a file called like_button.js, run in the terminal: