wait for uint8array in javascript code example

Example 1: ~~ in javascript

~~'-1' = -1
~~true = 1
~~false = 0
~~5.6 = 5

Example 2: boucle for in js

let panier = ['fraise', 'banane', 'poire'];

for (const fruit in panier) {
    console.log(panier[fruit]);
}