简单的Todo List实现（附源码）-526互联

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Todo List</title>
    <style>
        body {
            background-color: #f6f6f6;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: 600px;
            margin: 20px auto;
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            padding: 20px;
        }

        .header {
            text-align: center;
            margin-bottom: 20px;
            color: #3f51b5;
        }

        .todo-form {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }

        .todo-input {
            flex: 1;
            padding: 10px;
            border: none;
            border-radius: 5px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }

        .todo-button {
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            background-color: #3f51b5;
            color: #fff;
            cursor: pointer;
        }

        .todo-list {
            list-style: none;
            padding: 0;
        }

        .todo-item {
            display: flex;
            align-items: center;
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 10px;
            background-color: #e8e8e8;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        .todo-item:last-child {
            margin-bottom: 0;
        }

        .todo-item-checkbox {
            margin-right: 10px;
        }

        .todo-item-text {
            flex: 1;
            color: #3f51b5;
            font-weight: bold;
        }

        .todo-item-delete {
            padding: 5px 10px;
            border: none;
            border-radius: 5px;
            background-color: #ff6b6b;
            color: #fff;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .todo-item-delete:hover {
            background-color: #ff4f4f;
        }
    </style>
</head>
<body>
<div class="container">
    <h1 class="header">Todo List</h1>
    <form class="todo-form" id="todoForm" action="">
        <input type="text" class="todo-input" placeholder="Add a new todo" id="todoInput">
        <button type="submit" class="todo-button">Add</button>
    </form>
    <ul class="todo-list" id="todoList">

    </ul>
</div>
</body>
</html>
<script>
    const todoForm = document.getElementById("todoForm")
    const todoList = document.getElementById("todoList")
    const todoInput = document.getElementById("todoInput")

    function createToDoItem(text) {
        const li = document.createElement('li')
        li.className = "todo-item"
        li.innerHTML = `
            <input type="checkbox" class="todo-item-checkbox">
                   <span class="todo-item-text">${text}</span>
                   <button class="todo-item-delete">Delete</button>`
        return li
    }

    todoForm.onsubmit = function (event) {
        event.preventDefault()//onsubmit事件应该跳转新页面,用这个消除跳转
        /* console.log(todoInput.value.trim())//用户输入的内容 trim且去除空格*/
        const todoText = todoInput.value
        if (!todoText) return
        //弱类型转换，转换为布尔值！'' 非空是true
        const li = createToDoItem(todoText.trim())//trim去掉字符串头尾里的空格
        // console.log(li)
        todoList.appendChild(li)//把生成的li放到ul里面去
        todoInput.value = ''
    }


    todoList.onclick = function (event) {
        // console.log(event.target,event.target.parentNode)
        if (event.target.className === "todo-item-delete" && confirm("Are you sure you want to delete this?")) {
            event.target.parentNode.remove()//confirm是弹出框
        }
    }


</script>