[Idea] Javascript stuff that you don't know

[Mte90]

Explain how to work a rendering engine with optimization and not focusing on es5 vs es6 or advanced stuff. Only code optimization that improve your code and quality of the app.

• https://pagebuildersandwich.com/increased-plugins-performance-200/
• https://gist.github.com/paulirish/5d52fb081b3570c81e3a
• domcontentload
• https://polyfill.io/v2/docs/
• https://developer.mozilla.org/en-US/docs/Glossary/IIFE
• https://gist.github.com/hallettj/64478
• https://hacks.mozilla.org/2016/08/animating-like-you-just-dont-care-with-element-animate/
• cache selectors
• XHR vs fetch https://developer.mozilla.org/en/docs/Web/API/Fetch_API
• function outside doc ready so they are global
• no document.write https://blog.dareboost.com/en/2016/09/avoid-using-document-write-scripts-injection/
• http://blog.teamtreehouse.com/3-lessons-javascript-output-coffeescript
• http://stackoverflow.com/a/8284398/1902215

[Mte90]

Javascript is a too much trend topic and this one can be a problem to manage