javascript random pick variable

问题

How can I make javascript randomly choose between two buttons to click?

var $1Button = $('#1'),
    $2Button = $('#2');

function startQuiz(){
  $1Button.trigger('click');
}

回答1:

An easy way to handle this situation is to place your two buttons in an array and pick a random index in that array to trigger the click. As an added bonus, the code will easily expand to more than two buttons.

var $buttons = [$('#1'), $('#2')];

function startQuiz(){
  var buttonIndex = Math.floor(Math.random() * $buttons.length)
  $buttons[buttonIndex].trigger('click');
}

回答2:

You will need a function that can basically flip a coin and give you a 0 or 1, true or false, etc. It would probably be easiest to build an array of your elements, generate a random array index, find the element in the array and then trigger the click:

var buttons = [$('#1'), $('#2')];

function getRandomButton() {
    return buttons[Math.floor(Math.random() * buttons.length)];
}

function startQuiz(){
    getRandomButton().trigger('click');
}

来源：https://stackoverflow.com/questions/41656802/javascript-random-pick-variable