JAVASCRIPT

how to get random value less than in array js

var items = [1, 2, 3, 4, 5];
var newItems = [];

for (var i = 0; i < 1; i++) {
  var idx = Math.floor(Math.random() * items.length);
  newItems.push(items[idx]);
  items.splice(idx, 1);
}

console.log(newItems);
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how to get more than 1 random item in an array javascript

var getMeRandomElements = function(sourceArray, neededElements) {
    var result = [];
    for (var i = 0; i < neededElements; i++) {
        result.push(sourceArray[Math.floor(Math.random()*sourceArray.length)]);
    }
    return result;
}