如何一次掷一个骰子？

Question

这就是我目前所拥有的。我对 javascript 很陌生。如何让这些骰子在 div 内按顺序滚动？比如只显示第一个随机数后才显示下一个随机数。

<html>
<style>
.numdiv{
height: 400px;
width: 200px;
border:solid 1px green; 
float: left
}
</style>

<head>
<script>
function rollDice(){
var number1 = document.getElementById("number1");
var number2 = document.getElementById("number2");
var number3 = document.getElementById("number3");
var status = document.getElementById("status");
var d1 = Math.floor(Math.random() * 6) + 1;
var d2 = Math.floor(Math.random() * 6) + 1;
var d3 = Math.floor(Math.random() * 6) + 1;
var diceTotal = d1 + d2 + d3;

    number1.innerHTML = d1;
    number2.innerHTML = d2;
    number3.innerHTML = d3;
    status.innerHTML = "You rolled "+diceTotal+".";
    if(diceTotal == 15){
        status.innerHTML += "You Win!!";
    }
}
</script>
</head>
<body>
<table>
<tr>
<td>
<div class="numdiv" id="number1">

0</div>
<div class="numdiv"  id="number2">
0</div>
<div class="numdiv"  id="number3">
0</div>
</td>
</tr>
<tr>
<td><button onclick="rollDice()"/>Generate Number</button></td></tr>
<tr>
<td><span id="status">0</span></td></tr>
</table>

</body>


</html>

Answer 1

您可以使用 setTimeout() method 来延迟函数的执行，这样一次可以掷一个骰子：

function rollDice(){
  var status = document.getElementById("status");
  var nums = document.querySelectorAll(".numdiv");
  var diceTotal = 0;
  var current;
  
  for (current = 0; current < nums.length; current++) {
    nums[current].innerHTML = "?";
  }
  
  current = 0;
  status.innerHTML = "Rolling...";
  
  function rollNext() {
    currentRoll = Math.floor(Math.random() * 6) + 1;
    nums[current].innerHTML = currentRoll;
    diceTotal += currentRoll;
    current++;
    if (current < nums.length) {
      setTimeout(rollNext, 1000);
    } else {
      status.innerHTML = "You rolled " + diceTotal + ".";
      if(diceTotal == 15){
        status.innerHTML += "You Win!!";
      }    
    }
  }
  setTimeout(rollNext, 1000);
}

.numdiv { height: 30px; width: 30px; border:solid 1px green; float: left; margin: 10px }

<table>
<tr>
  <td>
    <div class="numdiv" id="number1"></div>
    <div class="numdiv"  id="number2"></div>
    <div class="numdiv"  id="number3"></div>
  </td>
</tr>
<tr>
  <td><button onclick="rollDice()"/>Generate Number</button></td></tr>
<tr>
  <td><span id="status">0</span></td>
</tr>
</table>

另请注意，我已经删除了单独的 number1、number2 和 number3 变量，而是使用单个变量 num 来引用所有列表.numDiv div 个元素。这样你就可以很容易地改变你想使用多少个骰子而不用改变 JS（你只需要添加或删除 .numDiv 元素）。

编辑： 正如我在上面发布的那样，您澄清了您希望用户按下每个骰子的按钮，而不是延迟自动滚动所有三个。所以我想，也许像下面这样，在函数外声明的变量中保留一个计数器和总数：

  var statusSpan = document.getElementById("status");
  var nums = document.querySelectorAll(".numdiv");
  var diceTotal;
  var current = 0;

  function rollDice(){
    if (current === 0) { // reset display
      for (var i = 0; i < nums.length; i++)
        nums[i].innerHTML = "?";
      diceTotal = 0;
    }
    
    currentRoll = Math.floor(Math.random() * 6) + 1;
    nums[current].innerHTML = currentRoll;
    diceTotal += currentRoll;
    if (++current < nums.length) {
      statusSpan.innerHTML = "Current total: " + diceTotal + ".";
    } else {
      statusSpan.innerHTML = "You rolled " + diceTotal + ".";
      if(diceTotal == 15){
        statusSpan.innerHTML += "You Win!!";
      }
      current = 0;
    }
  }

.numdiv { height: 30px; width: 30px; border:solid 1px green; float: left; margin: 10px; text-align: center }

<table>
<tr>
  <td>
    <div class="numdiv" id="number1"></div>
    <div class="numdiv"  id="number2"></div>
    <div class="numdiv"  id="number3"></div>
  </td>
</tr>
<tr>
  <td><button onclick="rollDice()">Roll next die</button></td></tr>
<tr>
  <td><span id="status">Ready to roll?</span></td>
</tr>
</table>

Answer 2

在您的 rollDice 函数之外创建一个从 1 开始的计数器变量，每次单击该变量，然后将计数器增加 1。然后你需要用这个替换所有的数字变量：

var number = document.getElementById("number" + counter);

我想你知道从这里到哪里去了。如果您需要更多指导，请告诉我！

Answer 3

基于您现有的逻辑，如果您想在每次用户点击时显示 1，那么另一种方法....

    var totalIter = 0;//global var which is set to increments on each click
    var diceTotal = 0;

    function rollDice() {
        totalIter = totalIter + 1; //increment by 1
        //Existing logic from your script
        var ele = document.getElementById("number" + totalIter);
        var d1 = Math.floor(Math.random() * 6) + 1;
        var status = document.getElementById("status");
        diceTotal = diceTotal + d1;
        ele.innerHTML = d1;
        status.innerHTML = "You rolled " + diceTotal + ".";
        if (diceTotal == 15) {
            status.innerHTML += "You Win!!";
        }
    }

如何一次掷一个骰子？

How to roll one dice at a time?

javascript

dice