(everyone should learn to code. https://hourofcode.com)
In recent years, it’s been common for JavaScript (aka EcmaScript) programmers to use Source to source compilers, also known as “transpilers”, to convert a more enhanced or modern version of the language to an earlier version that can run on older browsers.
npm install
you see this all the time in a build step, such as here: http://www.codecadwallader.com/2015/03/15/integrating-gulp-into-your-tfs-builds-and-web-deploy/
