By now TypeScript shouldn’t be something one has to introduce. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. If you haven’t already done it, go and see the intro video for TypeScript, check out a tutorial and visit the typescript playground. There are other javascript libraries which extend javascript and are compatible/compile to javascript: Dart and CoffeeScript. To be honest I had never time to try those.

Many words have been said about the importance of performance when working with javascript files. Here I want to summarize what developers can do to increase the performance related to javascript. I found many tips on blogs. Here comes my aggregated list of actions one can do to speed up sharepoint (and not only) sites with focus on javascript: 1. Load only sharepoint stuff you need Use prefetch option to only load sharepoint javascript files that needed.