Chapter 1, Building with Modules, covers how to use ECMAScript modules to organize code and how to configure modern browsers to use them. This chapter also covers compatibility with Google's Chrome and Mozilla's Firefox browser, and how to make them work with modules.
Chapter 2, Staying Compatible with Legacy Browsers, covers how to convert code that uses ECMAScript modules into a format that can be used by platforms that don't support them. We use webpack, a common JavaScript compilation tool, to assemble our modules into a single JavaScript file (called a bundle) and load it into our browser when ECMASript modules aren't compatible.
Chapter 3, Working with Promises, covers how to use the Promise API to organize asynchronous ...
