Question

我正在尝试构建一个计算器，此时需要“收集”在数组中单击的任何数字。现在我不确定在哪里构建那个数组（它应该是在一个不同的函数中吗？）。我想我需要使用.push（），但知道我需要在数组上使用它，并且不确定在哪里定义它。当我在console.log（gridItems）时，显然我得到所有，但只想要数字......

/*Calculator 

function add(n, x) {
  return n + x;
}
console.log(add(3, 8));

function subtract(n, x) {
  return n - x;
}
console.log(subtract(3, 8));

function multiply(n, x) {
  return n * x;
}
console.log(multiply(3, 8));

function divide(n, x) {
  return n / x;
}
console.log(divide(3, 8));*/

// console.log number when button is clicked

function getValue(e){
  var divValue = parseInt(e.target.textContent);
    console.log(divValue);
   }

function numberTrack() {
  
  var gridItems = document.getElementsByClassName('grid');

  for (var i = 0; i < gridItems.length; i ++) {
      gridItems[i].onclick = getValue;
  }
}

numberTrack();

#grid-container {
  width: 200px;
}

.grid {
  width: 50px;
  height: 50px;
  display: inline-block;
  text-align: center;
}

.gray {
  background-color: #ccc;
}

.pink {
  background-color: pink;
}

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Bin</title>
  <div id="grid-container" data-value="1">
    <div class="grid gray">0</div>
    <div class ="grid pink">1</div>
    <div class="grid gray">2</div>
    <div class ="grid pink">3</div>
    <div class="grid gray">4</div>
    <div class ="grid pink">5</div>
    <div class="grid gray">6</div>
    <div class ="grid pink">7</div>
    <div class="grid gray">8</div>
    <div class ="grid pink">9</div>
  </div>
  </head>
<body>

</body>
</html>

Answer 1

您可以在全球范围内定义它，如下所示：

var clickedNumbers = []

function getValue(e) {
    var divValue = parseInt(e.target.textContent);
    clickedNumbers.push(divValue);
}

function numberTrack() {
    var gridItems = document.getElementsByClassName('grid');

    for (var i = 0; i < gridItems.length; i++) {
        gridItems[i].onclick = getValue;
    }
}

numberTrack（）;

然后按clickedNumbers

将点击的数字推送到数组clickedNumbers.push(divValue)

在点击事件中将数字推入数组

1 个答案: