👀 var, let, const in javascript . just 30sec

	redeclare	reassign	scope	initialize
let	⛔	✅	🗳 block	⛔
const	⛔	⛔	🗳 block	⛔
var	✅	✅	function	"undefined"

💎 const

the word const comes from constant, so it shouldn't change at all.

• redeclare -> NO❗
• reassign -> NO❗
• scope -> block! We protect const in block !!
• initialize -> of course NO❗

💎 let

let is actually almost const except one thing

• reassign -> OK ✅

💎 var

var is so much freedom man, it's not recommended now

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▼ and difference of hoisting, I've wrote about it in other article

Hoisting in javascript. Magic of declare order

Kaziu ・ Sep 25 '22

#javascript #beginners