console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
<head>
  <title>Todo List</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <style>
    /* 基本样式 */
    body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
    }

    .container {
      max-width: 800px;
      margin: 0 auto;
      padding: 20px;
      background-color: #fff;
      border-radius: 5px;
      box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    }

    h1 {
      text-align: center;
      margin-top: 0;
    }

    /* 输入框和添加按钮 */
    .add-todo {
      display: flex;
      align-items: center;
      margin-bottom: 20px;
    }

    .add-todo input[type=text] {
      flex-grow: 1;
      margin-right: 10px;
      padding: 10px;
      border-radius: 3px;
      border: none;
      font-size: 16px;
      box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.1);
    }

    .add-todo button {
      background-color: #3C3C3C;
      color: #fff;
      border: none;
      padding: 10px;
      cursor: pointer;
      border-radius: 3px;
      font-size: 16px;
      transition: background-color 0.2s ease-in-out;
    }

    .add-todo button:hover {
      background-color: #444;
    }

    /* 分类按钮 */
    .category-btns {
      display: flex;
      margin-bottom: 20px;
    }

    .category-btn {
      background-color: #3C3C3C;
      color: #fff;
      border: none;
      padding: 10px;
      cursor: pointer;
      border-radius: 3px;
      font-size: 16px;
      transition: background-color 0.2s ease-in-out;
      margin-right: 10px;
    }

    .category-btn.active {
      background-color: #444;
    }

    /* 任务卡片 */
    .todo-card {
      background-color: #fff;
      box-shadow: 0px 0px 5px rgba(0, 0, 0

, 0.1);
border-radius: 5px;
padding: 20px;
margin-bottom: 20px;
}
.todo-card.completed {
  text-decoration: line-through;
  color: #aaa;
}

.todo-card .title {
  font-weight: bold;
  margin-bottom: 10px;
}

.todo-card .category {
  font-size: 12px;
  margin-bottom: 10px;
  color: #888;
}

/* 不同分类的样式 */
.category-work .todo-card {
  border-left: 5px solid #1abc9c;
}

.category-study .todo-card {
  border-left: 5px solid #3498db;
}

.category-shopping .todo-card {
  border-left: 5px solid #f1c40f;
}

/* 响应式布局 */
@media screen and (max-width: 600px) {
  .container {
    padding: 10px;
  }

  .add-todo {
    flex-wrap: wrap;
    margin-bottom: 10px;
  }

  .add-todo input[type=text] {
    width: 100%;
    margin-right: 0;
    margin-bottom: 10px;
  }

  .category-btns {
    flex-wrap: wrap;
    margin-bottom: 10px;
  }
  .category-btn {
    margin-right: 10px;
    margin-bottom: 10px;
  }
}
</style>
</head>
<body>
  <div class="container">
    <h1>Todo List</h1>
    <!-- 输入框和添加按钮 -->
<div class="add-todo">
  <input type="text" id="todo-input" placeholder="Add a new todo">
  <button id="add-btn">Add</button>
</div>

<!-- 分类按钮 -->
<div class="category-btns">
  <button class="category-btn active" data-category="all">All</button>
  <button class="category-btn" data-category="work">Work</button>
  <button class="category-btn" data-category="study">Study</button>
  <button class="category-btn" data-category="shopping">Shopping</button>
</div>

<!-- 任务列表 -->
<div class="todo-list">
</div>
</div>
  <script>
    const todoInput = document.getElementById("todo-input");
    const addBtn = document.getElementById("add-btn");
    const todoList = document.querySelector(".todo-list");
    const categoryBtns = document.querySelectorAll(".category-btn");

    // 保存任务列表
    let todos = [];

    // 添加任务
    function addTodo() {
      const todoText = todoInput.value.trim();

      if (!todoText) {
        return;
      }

      const todo = {
        id: Date.now(),
        text: todoText,
        completed: false,
        category: "all"
      };

      todos.push(todo);
      renderTodos();
      todoInput.value = "";
    }

    // 删除任务
    function deleteTodoById(id) {
      todos = todos.filter(todo => todo.id !== id);
      renderTodos();
    }

    // 切换完成状态
    function toggleTodoComplete(id) {
      const todo = todos.find(todo => todo.id === id);
      todo.completed = !todo.completed;
      renderTodos();
    }

    // 渲染任务列表
    function renderTodos(category = "all") {
      // 根据分类筛选任务
      const filteredTodos = todos.filter(todo => category === "all" || todo.category === category);

      todoList.innerHTML = "";

      filteredTodos.forEach(todo => {
        const todoCard = document.createElement("div");
        todoCard.classList.add("todo-card");
        todoCard.classList.toggle("completed", todo.completed);

        const title = document.createElement("div");
        title.classList.add("title");
        title.textContent = todo.text;

        const category = document.createElement("div");
        category.classList.add("category");
        category.textContent = todo.category;

        const deleteBtn = document.createElement("button");
        deleteBtn.textContent = "Delete";
        deleteBtn.addEventListener("click", () => deleteTodoById(todo.id));

        const completeBtn = document.createElement("button");
        completeBtn.textContent = todo.completed ? "Undo" : "Complete";
        completeBtn.addEventListener("click", () => toggleTodoComplete(todo.id));

        todoCard.appendChild(title);
        todoCard.appendChild(category);
        todoCard.appendChild(deleteBtn);
        todoCard.appendChild(completeBtn);

        todoList.appendChild(todoCard);
      });
    }

    // 添加任务按钮点击事件
    addBtn.addEventListener("click", addTodo);

    // 分类按钮点击事件
    categoryBtns.forEach(btn => {
      btn.addEventListener("click", () => {
        categoryBtns.forEach(btn => btn.classList.remove("active"));
        btn.classList.add("active");
        const category = btn.dataset.category;
        renderTodos(category);
      });
    });
  </script>
</body>