HOW JAVASCRIPT WAS WRITTEN BACK IN THE DAY

Summary from the TLDR Web Dev newsletter

JavaScript was written in the past (2006-2015) with frameworks like jQuery and Backbone.js. Devs came up with creative solutions to overcome browser inconsistencies and language limitations before modern JavaScript features like `fetch()` and `Object.assign()`. For example, jQuery used clever tricks like method chaining with `$('#element').addClass('active').fadeIn()` and `[].push.apply(this, num)` to make jQuery objects behave like arrays.