Using Webpack

Using a module loader like webpack is essential for migrating to Angular, andshould already be part of every modern programmer's tool set. Webpack will makeit easy to manage all the different files that a modern, modular Angular 1.3+project prescribes. This includes bundling the application for distribution ordeployment.

Using webpack will also simplify a programmer's Angular workflow, since theeasiest way to work with Angular is with TypeScript, or ES6, neither of whichworks natively in contemporary browsers.

原文: https://angular-2-training-book.rangle.io/handout/migrate/migration-prep/use_webpack.html