What is the use of polyfills.ts file in Angular 2?
In Angular 2, the polyfills.ts file is used to make user application compatible for various browsers. The code we write in Angular 2 is mostly in ES6, which is not compatible with Firefox or IE, and requires few environmental setups before they wither get viewed or used in browsers.
Angular offers Polyfills.ts file to help users with the required setup.
BY Best Interview Question ON 24 Jun 2020