What is the usage of bundle files in Angular?

These are angular js files for following uses:

Main.js:  

main. js contains all our code including components (ts, html and css codes), pipes, directives, services and all other imported modules (including third party). As you can see over time main. js file will be bigger and bigger based on your code.

polyfills.js

This one should be self explanatory. It contains all the polyfills you declare in your polyfills.ts file.

 

Regards

Rijwan