JavaScripts map function deconstructed

jsMap.js

//--Write your own map() function
//
//--Input: array, callback funtion
//
//--Output: new array where every element is transformed by the callback function

const map = (array, callback) => {
    let newArr = [];
    for (var i = 0; i < array.length; i++) {
        newArr[i] = callback(array[i], i)
    }
    return newArr;
}