我正在尝试编写一个程序,在addItem函数中,输入值将被附加到复选框并尝试将复选框和输入的值附加到ul到li中。我能够在输出中看到复选框,但不能看到输入的值。但是,在控制台日志中,我能够看到输入的值。因此,我认为逻辑中存在问题,但无法弄清楚是什么。
let input = document.getElementById('input');
let addButton = document.getElementById('addButton');
let removeButton = document.getElementById('removeButton');
let ul;
let li;
let inputTag;
const addItem = () => {
let getItem = input.value;
ul = document.getElementById('list');
li = document.createElement('li');
inputTag = document.createElement('input');
inputTag.type = 'checkbox';
inputTag.id = 'check';
let label = document.createElement('label');
let newItem = document.createTextNode(getItem);
console.log(newItem)
label.appendChild(newItem);
inputTag.appendChild(label);
li.appendChild(inputTag);
ul.appendChild(li);
input.value = '';
}
const removeItem = () => {
}
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="style.css">
<title>Hello, world!</title>
</head>
<body>
<div class="container">
<div class="controls">
<h1>Todo App</h1>
<input type="text" id="input">
<button onclick=addItem() id="addButton">Add</button>
<button id="removeButton">Remove</button>
</div>
<ul id="list">
<li class="mycheck">
<input type="checkbox" id="check">Eat
</li>
<li class="mycheck">
<input type="checkbox" checked id="check">Sleep
</li>
</ul>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="script.js"></script>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>
您可能需要做一些更改
addItem
的<button onclick=addItem()
需要在引号内。id
。 id应该是唯一的。label
。这就是你看不到标签文字的原因。label
for
属性。除了可访问性之外,如果单击文本,它还会选中并取消选中该复选框。例如,如果您在示例中单击Eat
和Sleep
文本,它将不会对复选框进行任何更改。但在此示例中,如果您通过输入创建一个复选框并单击文本,您将看到复选框状态的更改。
在您的代码中,您正在加载script.js
befor其他库文件。如果script.js
对库有任何依赖性,这可能会导致错误。首先加载库然后加载自定义文件let input = document.getElementById('input');
let addButton = document.getElementById('addButton');
let removeButton = document.getElementById('removeButton');
let ul;
let li;
let inputTag;
const addItem = () => {
let getItem = input.value;
console.log(getItem)
ul = document.getElementById('list');
li = document.createElement('li');
inputTag = document.createElement('input');
inputTag.type = 'checkbox';
inputTag.id = 'check_' + getItem;
let label = document.createElement('label');
label.setAttribute('for', 'check_' + getItem)
let newItem = document.createTextNode(getItem, );
label.appendChild(newItem);
//inputTag.appendChild(label);
li.appendChild(inputTag);
li.appendChild(label);
ul.appendChild(li);
input.value = '';
}
const removeItem = () => {
}
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="style.css">
<title>Hello, world!</title>
<div class="container">
<div class="controls">
<h1>Todo App</h1>
<input type="text" id="input">
<button onclick="addItem()" id="addButton">Add</button>
<button id="removeButton">Remove</button>
</div>
<ul id="list">
<li class="mycheck">
<input type="checkbox" id="check">Eat
</li>
<li class="mycheck">
<input type="checkbox" checked id="checkSleep">Sleep
</li>
</ul>
</div>
输入元素为空或无效元素。在它们上添加元素不会给你正确的结果。在li中添加label元素而不是input元素。
请注意:id属性在文档中必须是唯一的,您可以使用class属性。
let input = document.getElementById('input');
let addButton = document.getElementById('addButton');
let removeButton = document.getElementById('removeButton');
let ul;
let li;
let inputTag;
const addItem = () => {
let getItem = input.value;
ul = document.getElementById('list');
li = document.createElement('li');
inputTag = document.createElement('input');
inputTag.type = 'checkbox';
inputTag.class = 'check';
let label = document.createElement('label');
let newItem = document.createTextNode(getItem);
//console.log(newItem)
label.appendChild(newItem);
li.appendChild(inputTag);
li.appendChild(label);
ul.appendChild(li);
input.value = '';
}
const removeItem = () => {
}
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="style.css">
<title>Hello, world!</title>
</head>
<body>
<div class="container">
<div class="controls">
<h1>Todo App</h1>
<input type="text" id="input">
<button onclick=addItem() id="addButton">Add</button>
<button id="removeButton">Remove</button>
</div>
<ul id="list">
<li class="mycheck">
<input type="checkbox" class="check">Eat
</li>
<li class="mycheck">
<input type="checkbox" checked class="check">Sleep
</li>
</ul>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="script.js"></script>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>