JS, not bad basics

https://codeburst.io/cool-javascript-shortcuts-and-tips-for-everyday-use-66cd174ab216
https://blog.logrocket.com/javascript-typeof-2511d53a1a62
https://codeburst.io/es6-destructuring-the-complete-guide-7f842d08b98f
https://blog.logrocket.com/javascript-es6-5-new-abstractions-to-improve-your-code-54a369e82407
https://medium.freecodecamp.org/https-medium-com-gladchinda-hacks-for-creating-javascript-arrays-a1b80cb372b
https://hackernoon.com/conditional-javascript-for-experts-d2aa456ef67c