Just a quick intro to JavaScript Arrow Functions to be used as an "aside" in a medium post

JsArrowFunctions.md

Arrow Functions aka => aka Fat Arrow aka Lambdas

It's a sugary anon function with some key differences. (params) => { code }

Syntax

• No need for the function keyword
• No need for {} if the function is only a single line
• Single arguments (except rest args) don't need () but 0 args do
• return is implicit with single line functions

vs Regular Functions

• Lexical this - the most important; unlike a function, it does not define its own this value, it uses the enclosing context's this.
• Lexical arguments - they share the arguments object of the enclosing scope. rest parameters can be used as an alternative.
• They can't be used as generators or constructors; may have unexpected effects when used as methods; etc...