从数组中删除唯一的随机项目，然后重新填充以重新启动该过程？

Question

var myArray = ['A','B','C'];document.getElementById("button").onclick = function() {    if (myArray.length > 0) {      var a = Math.floor(Math.random() * myArray.length);      var b = myArray.splice(a, 1);      document.getElementById("showRand").innerHTML = b[0];    } else {       //restart    }}<button id="button">click</button><div id="showRand"></div>Onclick时，它随机清空myArray，如何重新填充数组，然后在myArray为空时重复该过程？感谢您的帮助..

Answer 1

var myArray = ['A','B','C'];

document.getElementById("button").onclick = function() {

    if (myArray.length == 0) {

      myArray = ['A','B','C'];

    }

    var a = Math.floor(Math.random() * myArray.length);

    var b = myArray.splice(a, 1);

    document.getElementById("showRand").innerHTML = b[0];

}

<button id="button">click</button>

<div id="showRand"></div>