project:todo

todos/src/App.vue

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+<script>
+import TodoHeader from './components/TodoHeader.vue'
+import TodoList from './components/TodoList.vue'
+import TodoFooter from './components/TodoFooter.vue'
+
+export default {
+  components: {
+    TodoHeader,
+    TodoList,
+    TodoFooter
+  },
+
+  data() {
+    return {
+      // 从 localStorage 初始化
+      todos: JSON.parse(localStorage.getItem("vue-todos") || "[]"),
+      tabType: 0 // 0全部 1未完成 2已完成
+    }
+  },
+
+  computed: {
+    // 筛选后的列表
+    todoList() {
+      if (this.tabType === 0) return this.todos
+      const type = this.tabType
+      return this.todos.filter(item => {
+        if (type === 1) return !item.completed
+        return item.completed
+      })
+    }
+  },
+
+  methods: {
+    // 添加待办
+    addTodo(newTodo) {
+      this.todos.push({
+        id: Date.now(),
+        txt: newTodo,
+        completed: false
+      })
+    },
+
+    // 删除待办
+    delTodo(item) {
+      this.todos = this.todos.filter(t => t.id !== item.id)
+    },
+
+    changeTabType(type) {
+      this.tabType = type
+    }
+  },
+
+  // 深度监听 — 自动写入 localStorage
+  watch: {
+    todos: {
+      handler(todos) {
+        localStorage.setItem("vue-todos", JSON.stringify(todos))
+      },
+      deep: true
+    }
+  }
+}
+</script>
+
+<template>
+  <TodoHeader @addTodo="addTodo" />
+  <TodoList :todos="todoList" @delTodo="delTodo" />
+  <TodoFooter :count="todoList.length" :tabType="tabType" @changeTabType="changeTabType" />
+</template>
+
+<style>
+#app {
+  width: 600px;
+  margin: 50px auto;
+  padding: 20px;
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.08);
+  border-radius: 10px;
+  background: white;
+}
+</style>

todos/src/assets/vue.svg

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+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="37.07" height="36" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 198"><path fill="#41B883" d="M204.8 0H256L128 220.8L0 0h97.92L128 51.2L157.44 0h47.36Z"></path><path fill="#41B883" d="m0 0l128 220.8L256 0h-51.2L128 132.48L50.56 0H0Z"></path><path fill="#35495E" d="M50.56 0L128 133.12L204.8 0h-47.36L128 51.2L97.92 0H50.56Z"></path></svg>

todos/src/components/TodoFooter.vue

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+<template>
+  <div class="tdFooter">
+    <span>总计：{{ count }}</span>
+
+    <div class="tdTabs">
+      <a :class="{ active: tabType == 0 }" @click="tabClick(0)">全部</a>
+      <a :class="{ active: tabType == 1 }" @click="tabClick(1)">未完成</a>
+      <a :class="{ active: tabType == 2 }" @click="tabClick(2)">已完成</a>
+    </div>
+  </div>
+</template>
+
+<script>
+export default {
+  props: ["count", "tabType"],
+
+  methods: {
+    tabClick(newType) {
+      this.$emit("changeTabType", newType)
+    }
+  }
+}
+</script>
+
+<style scoped>
+.tdFooter {
+  margin-top: 20px;
+  padding-top: 15px;
+  border-top: 1px solid #ddd;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.tdFooter span {
+  font-size: 16px;
+  color: #555;
+}
+
+.tdTabs a {
+  margin-right: 15px;
+  cursor: pointer;
+  font-size: 16px;
+  color: #666;
+  transition: 0.3s;
+}
+
+.tdTabs a:hover {
+  color: #409eff;
+}
+
+.active {
+  color: #409eff !important;
+  font-weight: bold;
+}
+</style>

todos/src/components/TodoHeader.vue

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+<template>
+  <div>
+    <h1>待办事项</h1>
+
+    <div class="input-wrapper">
+      <input placeholder="请输入您的待办事项，按下回车后即可添加" v-model.trim="newTodo" @keyup.enter="addNewTodo" />
+    </div>
+
+    <p v-show="isShowMsg" style="color: red">
+      最多输入{{ countLimit }}个字符！！！
+    </p>
+  </div>
+</template>
+
+<style scoped>
+h1 {
+  color: #409eff;
+  text-align: center;
+  margin-bottom: 20px;
+}
+
+input {
+  width: 90%;
+  max-width: 500px;
+  padding: 12px;
+  font-size: 16px;
+  border: 1px solid #ddd;
+  border-radius: 6px;
+  outline: none;
+  transition: 0.3s;
+}
+
+.input-wrapper {
+  display: flex;
+  justify-content: center;
+}
+
+input:focus {
+  border-color: #409eff;
+  box-shadow: 0 0 4px rgba(64, 158, 255, 0.5);
+}
+
+p {
+  margin-top: 8px;
+  color: red;
+  font-size: 14px;
+  text-align: center;
+}
+</style>
+
+<script>
+const WORD_COUNT_LIMIT = 50
+
+export default {
+  data() {
+    return {
+      newTodo: "",
+      countLimit: WORD_COUNT_LIMIT
+    }
+  },
+
+  computed: {
+    isShowMsg() {
+      return this.newTodo.length > WORD_COUNT_LIMIT
+    }
+  },
+
+  methods: {
+    addNewTodo() {
+      if (
+        this.newTodo.length === 0 ||
+        this.newTodo.length > WORD_COUNT_LIMIT
+      ) {
+        return
+      }
+
+      this.$emit("addTodo", this.newTodo)
+      this.newTodo = ""
+    }
+  }
+}
+</script>

todos/src/components/TodoList.vue

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+<template>
+  <div class="tdContainer">
+    <ul class="tdList">
+      <li class="tdItem" v-for="item in todos" :key="item.id">
+        <div class="tdItem-main">
+          <input type="checkbox" v-model="item.completed" class="toToggle" />
+
+          <span class="tdTxt" :class="{ completed: item.completed }">
+            {{ item.txt }}
+          </span>
+        </div>
+
+        <div class="tdItem-acts">
+          <a @click="delTodo(item)">删除</a>
+        </div>
+      </li>
+    </ul>
+  </div>
+</template>
+
+<style scoped>
+.tdContainer {
+  margin-top: 20px;
+}
+
+.tdList {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+}
+
+.tdItem {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px;
+  border-bottom: 1px solid #eee;
+  transition: 0.2s;
+}
+
+.tdItem:hover {
+  background: #fafafa;
+}
+
+.toToggle {
+  margin-right: 10px;
+}
+
+.tdItem-main {
+  display: flex;
+  align-items: center;
+}
+
+.tdTxt {
+  font-size: 16px;
+  transition: 0.3s;
+}
+
+.completed {
+  text-decoration: line-through;
+  color: #999;
+}
+
+.tdItem-acts a {
+  color: #ff4d4f;
+  cursor: pointer;
+  opacity: 0;
+  transition: 0.3s;
+}
+
+.tdItem:hover .tdItem-acts a {
+  opacity: 1;
+}
+
+.tdItem-acts a:hover {
+  text-decoration: underline;
+}
+</style>
+
+<script>
+export default {
+  props: ["todos"],
+
+  methods: {
+    delTodo(item) {
+      this.$emit("delTodo", item)
+    }
+  }
+}
+</script>
+
+<style>
+.tdList {
+  list-style: none;
+  padding: 0;
+}
+
+.tdItem {
+  display: flex;
+  justify-content: space-between;
+  padding: 8px;
+}
+
+.completed {
+  text-decoration: line-through;
+  color: gray;
+}
+</style>

todos/src/main.js

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+import { createApp } from 'vue'
+import App from './App.vue'
+
+createApp(App).mount('#app')

todos/src/style.css

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+:root {
+  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+
+button:hover {
+  border-color: #646cff;
+}
+
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+.card {
+  padding: 2em;
+}
+
+#app {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+
+  a:hover {
+    color: #747bff;
+  }
+
+  button {
+    background-color: #f9f9f9;
+  }
+}