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+{
+    "label": "vanilla ts工程",
+    "position": 12,
+    "link": {
+        "type": "generated-index"
+    }
+}
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+---
+sidebar_position: 1
+---
+# 如何使用html+ts编写前端todo list
+
+## 先决条件
+1. 已创建vanilla ts工程
+
+>**提示**                                  
+若未安装vanilla ts工程，可以参考[vite的入门](http://localhost:3000/full-stack-tutorial/docs/vite)文档
+
+## 项目初始化
+打开vanilla ts工程
+
+## 编写HTML结构
+在`index.html`中，通过以下代码，编写todo list的样式和基本结构
+```
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Document</title>
+  <style>
+    .icon-complete {
+      display: inline-block;
+      width: 20px;
+      height: 20px;
+      border: solid 1px #ddd;
+      border-radius: 50%;
+    }
+
+    .icon-complete-active {
+      border-color: green;
+      text-align: center;
+    }
+
+    .todo-item {
+      margin-bottom: 5px;
+    }
+
+    .icon-complete-active::after {
+      content: "√";
+      color: green;
+
+    }
+
+    .item-complete .todo-text {
+      color: #999;
+      text-decoration: line-through;
+    }
+  </style>
+</head>
+
+<body>
+  <div>
+    <input class="input-todo" type="text" placeholder="您想做点什么?">
+
+
+    <ul class="todo-list">
+      <li class="todo-item">
+        <span class="icon-complete" onclick="onClickCompleteBtn(0)"></span>
+        <span class="todo-text">吃饭</span>
+        <button class="btn-complete">完成</button>
+        <button class="deleted" onclick="deleteItem(0)">删除</button>
+      </li>
+      <li class="item-complete todo-item">
+        <span class="icon-complete icon-complete-active" onclick="onClickCompleteBtn(1)"></span>
+        <span class="todo-text">睡觉</span>
+        <button class="btn-complete">完成</button>
+        <button class="deleted" onclick="deleteItem(1)">删除</button>
+      </li>
+      <li class="item-complete todo-item">
+        <span class="icon-complete icon-complete-active" onclick="onClickCompleteBtn(2)"></span>
+        <span class="todo-text">打豆豆</span>
+        <button class="btn-complete">完成</button>
+        <button class="deleted" onclick="deleteItem(2)">删除</button>
+      </li>
+    </ul>
+<div>
+      <span>还有<span class="active-num">1</span>个未完成</span>
+      <div class="fliter-btn-group">
+        筛选:
+        <button class="filter-btn filter-btn-all" data-complete="all">全部</button>
+        <button class="filter-btn filter-btn-active" data-complete="false">未完成</button>
+        <button class="filter-btn filter-btn-completed" data-complete="true">已完成</button>
+         <button class="btn-clear">清空</buttosn>
+      </div>
+     
+    </div>
+    
+  </div>
+  <script src="./src/main.ts">
+   </script>
+</body>
+
+</html>
+```
+## 编写TypeScript逻辑
+在`main.ts`中，编写以下代码，实现todo list的功能
+```
+//定义接口TodoItem
+interface TodoItem {
+  name: string;
+  completed: boolean;
+}
+
+//初始化数组
+let list: TodoItem[] = [
+  { name: '吃饭', completed: false },
+  { name: '睡觉', completed: true },
+  { name: '打豆豆', completed: true },
+];
+
+//监听在输入框中按下回车键的事件
+document.querySelector('.input-todo')!.addEventListener('keyup', function (e: Event) {
+  const event = e as KeyboardEvent;
+  const target = event.target as HTMLInputElement;
+  if (!target.value?.trim()) {
+    return;
+  }
+  if (event.key === 'Enter') {
+    const name = target.value;
+    const item: TodoItem = { name, completed: false };
+    list.push(item);
+    render(list);
+    target.value = '';
+  }
+});
+
+//实现筛选功能
+document.querySelectorAll('.filter-btn').forEach((el) => {
+  el.addEventListener('click', filterCompletedStatus);
+});
+
+function filterCompletedStatus(e: Event) {
+  const target = e.target as HTMLElement;
+  const completed = target.dataset.complete;
+
+  if (completed === 'all') {
+    render(list);
+    return;
+  }
+
+  const newList = list.filter((item) => item.completed === (completed === 'true'));
+  renderTodoList(newList);
+}
+
+document.querySelector('.btn-clear')!.addEventListener('click', () => {
+  list = [];
+  render(list);
+});
+
+//切换completed的状态
+function onClickCompleteBtn(index: number) {
+  list[index].completed = !list[index].completed;
+  render(list);
+}
+
+//渲染数组
+function render(list: TodoItem[]) {
+  UpdateActiveNum();
+  renderTodoList(list);
+}
+
+//统计筛选中未完成功能数量
+function UpdateActiveNum() {
+  const completedNum = list.filter((item) => !item.completed).length;
+  document.querySelector('.active-num')!.innerHTML = completedNum.toString();
+}
+
+//实现删除功能
+function deleteItem(index: number) {
+  list.splice(index, 1);
+  render(list);
+}
+
+//渲染html
+function renderTodoList(list: TodoItem[]) {
+  let html = '';
+  list.forEach((item, index) => {
+    const itemClass = item.completed ? 'item-complete todo-item' : 'todo-item';
+    const spanClass = item.completed ? 'icon-complete icon-complete-active' : 'icon-complete';
+    html += `<li class="${itemClass}">
+      <span onclick="onClickCompleteBtn(${index})" class="${spanClass}"></span>
+      <span>${item.name}</span>
+      <button class="btn-complete">完成</button>
+      <button class="deleted" onclick="deleteItem(${index})">删除</button>
+    </li>`;
+  });
+  document.querySelector('.todo-list')!.innerHTML = html;
+}
+```
+## 运行项目
+按下快捷键`Ctrl + ~`,打开终端，输入以下命令，运行项目
+```
+npm run dev
+```
+![运行效果](./result.png)
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