Answers for "take the first 4 indexes of a number"

get first 10 items of array javascript

const list = ['apple', 'banana', 'orange', 'strawberry']
const size = 3
const items = list.slice(0, size) // res: ['apple', 'banana', 'orange']

javascript slice array

// array.slice(start, end)
const FRUITS = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = FRUITS.slice(1, 3);
// citrus => [ 'Orange', 'Lemon' ]

// Negative values slice in the opposite direction
var fromTheEnd = FRUITS.slice(-3, -1);
// fromTheEnd => [ 'Lemon', 'Apple' ]