Jest and ES6 Modules and userscripts

Greasemonkey (and thus userscripts) started when JavaScript was old and jQuery was well used. Since ES6 (ES2015) we have module imports, ES2017 brought us async/await and generally plenty useful features which should be used on modern browsers. Since Tampermonkey is only for newer browsers, we can use all those nice features instead of relying on old methods. Also testing…it’s a good thing once you get used to it. So developing userscripts nowadays should mean:

  • create testable code
  • use ES2017 code with module imports and async/await and fetch
  • no need for Babel and WebPack or jQuery

In the past I pretty much ignored the front-end, but now I have a use-case at work, so time to get the coding started:

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