我有一组学生，应该通过单击按钮“ button-newPairs”将它们随机配对。这些对应显示在8个div中，分别为“ pair one”，“ pair two”，...，其中包含两个跨度“ studentOne”和“ studentTwo”。我在控制台中找到了配对，但没有单击“ button-newPairs”按钮，我不知道如何在跨度中更改或插入文本内容。有人能帮助我吗？先感谢您。
var students = ['Al', 'Ma', 'Pu', 'Mi', 'Ma', 'Me', 'Ca', 'Na', 'Ja', 'Go', 'Ha', 'Fa', 'Ti', 'Fi' ];
var studentOne = document.querySelector('#student1');
var studentTwo = document.querySelector('#student2');
if (students.length % 2 != 0) {
alert("You must have an even number of students. You currently have " + students.length + " students.");
} else {
var arr1 = students.slice(),
arr2 = students.slice();
arr1.sort(function () { return 0.5 - Math.random(); });
arr2.sort(function () { return 0.5 - Math.random(); });
while (arr1.length) {
var student1 = arr1.pop(),
student2 = arr2[0] == student1 ? arr2.pop() : arr2.shift();
$(".button-newPairs").click(function () {
studentOne.textContent = student1;
studentTwo.textContent = student2;
});
console.log(student1 + ' works with ' + student2);
}
}
.container-pairs {
display: grid;
grid-template-columns: 150px 150px;
grid-gap: 20px;
justify-content: space-around;
align-content: center;
margin-bottom:20px;
}
.one {
grid-column: 1 / 2;
grid-row: 1;
}
.two {
grid-column: 2 / 2;
grid-row: 1;<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<div class="container-pairs">
<div class="pair one">
<span id="studentOne">NEW </span> <br>
<span id="studentTwo"> PAIRS</span>
</div>
<div class="pair two">
<span id="studentOne">NEW </span><br>
<span id="studentTwo"> PAIRS</span>
</div>
<div id="container-footer">
<div class="button-newPairs">
<span>NEW PAIRS</span>
</div>
</div>
</body>我已在网上发表评论。用//查找行
// Let's wrap this in a function so that we can call it with our button.
function makePairs() {
// We will clear our lists before each run of the function.
$('#studentOne').html('<h1>Student 1</h1>');
$('#studentTwo').html('<h1>Student 2</h1>');
var students = ['Al', 'Ma', 'Pu', 'Mi', 'Ma', 'Me', 'Ca', 'Na', 'Ja', 'Go', 'Ha', 'Fa', 'Ti', 'Fi'];
// By capturing these nodes in variables, we can reference them as our targets for insertion, below.
var studentOne = document.querySelector('#studentOne');
var studentTwo = document.querySelector('#studentTwo');
if (students.length % 2 != 0) {
alert("You must have an even number of students. You currently have " + students.length + " students.");
} else {
var arr1 = students.slice(),
arr2 = students.slice();
arr1.sort(function() {
return 0.5 - Math.random();
});
arr2.sort(function() {
return 0.5 - Math.random();
});
// Here we make a function that will insert a DOM fragment inside a target node
const insertFragment = (output, target) => {
let el;
let fragment = document.createDocumentFragment();
el = document.createElement('p');
el.innerText = output
fragment.appendChild(el);
target.appendChild(fragment);
}
while (arr1.length) {
var student1 = arr1.pop(),
student2 = arr2[0] == student1 ? arr2.pop() : arr2.shift();
// Here we use the function, sending student1 (the student) to studentOne (the target DOM node specified at the very top, #studentOne)
insertFragment(student1, studentOne)
insertFragment(student2, studentTwo)
console.log(student1 + ' works with ' + student2);
}
}
}
// Run the function on load
makePairs();.container-pairs {
display: grid;
grid-template-columns: 150px 150px;
grid-gap: 20px;
justify-content: space-around;
align-content: center;
margin-bottom: 20px;
}
.one {
grid-column: 1 / 2;
grid-row: 1;
}
.two {
grid-column: 2 / 2;
grid-row: 1;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<div class="container-pairs">
<div id="studentOne">
<h1>Student 1</h1>
</div>
<div id="studentTwo">
<h1>Student 2</h1>
</div>
</div>
<div id="container-footer">
<button class="button-newPairs" onclick="makePairs()">
NEW PAIRS
</button>
</div>
</body>该行上方的button标记已注册一个事件处理程序，用于单击，将再次运行makePairs（）函数。
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