WTF is a Source MapThese days web assets such as JS and CSS aren’t simple text files. Instead, they’re typically minified or come from a complex build process involving compiling or transpiling. For example, CSS can be generated from a SASS file. JS can be compiled from ES6 using Babel. These toolchains make working with assets easier for developers, and make following best practices such as minification much easier
GitHub - Mange/roadie: Making HTML emails comfortable for the Ruby rockstars
