feat: add Vue2 exercises for dynamic styles, lifecycle methods, component communication, and course management dashboard
- Implement dynamic styles and event handling in Vue2 with a card component. - Create lifecycle methods exercise to simulate async data loading and instance destruction. - Develop a component communication exercise with props, events, and slots. - Build a comprehensive course management dashboard with filtering, statistics, and component interactions.
This commit is contained in:
charlie
33
07-vue2/08-components-communication-and-final/README.md
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07-vue2/08-components-communication-and-final/README.md
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# 练习 8：组件通信与综合练习
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## 目标
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把 Vue2 最核心的组件能力串起来，完成一个小型页面。
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## 你要练什么
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- 组件注册（全局 / 局部）
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- `props`
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- `props` 校验
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- `$emit`
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- `slot`
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- `ref`
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## 任务
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请基于页面结构完成以下操作：
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- 把课程卡片拆成子组件
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- 注册一个全局角标组件
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- 父组件通过 `props` 传课程数据
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- 给 `props` 补上类型、必填、默认值或校验规则
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- 子组件点击按钮后通过 `$emit` 通知父组件切换状态
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- 用 `slot` 自定义按钮文案
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- 用 `ref` 聚焦输入框
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## 文件
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- [starter.html](/Users/lijiaqing/home/wwwroot/front-end-example/07-vue2/08-components-communication-and-final/starter.html)
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- [starter.js](/Users/lijiaqing/home/wwwroot/front-end-example/07-vue2/08-components-communication-and-final/starter.js)
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- [answer.html](/Users/lijiaqing/home/wwwroot/front-end-example/07-vue2/08-components-communication-and-final/answer.html)
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- [answer.js](/Users/lijiaqing/home/wwwroot/front-end-example/07-vue2/08-components-communication-and-final/answer.js)
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43
07-vue2/08-components-communication-and-final/answer.html
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07-vue2/08-components-communication-and-final/answer.html
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>组件通信与综合练习</title>
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<style>
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body { margin: 0; padding: 32px; font-family: "PingFang SC", sans-serif; background: #f4f7fb; }
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.wrap { max-width: 860px; margin: 0 auto; display: grid; gap: 16px; }
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.toolbar, .card { padding: 20px; border-radius: 18px; background: #fff; border: 1px solid #d9e3f2; }
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.list { display: grid; gap: 14px; }
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button { padding: 10px 14px; border: 0; border-radius: 999px; background: #2d6cdf; color: #fff; cursor: pointer; }
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input { width: 100%; padding: 12px; border-radius: 12px; border: 1px solid #cfd8e8; }
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.done { color: #1f8f54; }
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</style>
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</head>
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<body>
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<section id="app" class="wrap">
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<article class="toolbar">
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<h1>Vue2 综合练习</h1>
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<input ref="keywordInput" v-model="keyword" type="text" placeholder="输入关键字过滤课程" />
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<button type="button" @click="focusInput">聚焦输入框</button>
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</article>
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<section class="list">
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<course-card
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v-for="course in filteredCourses"
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:key="course.id"
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:course="course"
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theme="accent"
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@toggle="toggleCourse"
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>
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<template v-slot:action>
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切换完成状态
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</template>
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</course-card>
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</section>
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</section>
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<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
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<script src="./answer.js"></script>
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</body>
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</html>
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80
07-vue2/08-components-communication-and-final/answer.js
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07-vue2/08-components-communication-and-final/answer.js
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Vue.component("course-badge", {
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props: {
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label: {
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type: String,
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default: "默认角标",
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},
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},
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template: `<span style="display:inline-block;margin-bottom:8px;padding:4px 10px;border-radius:999px;background:#eef4ff;color:#2d6cdf;">{{ label }}</span>`,
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});
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const CourseCard = {
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props: {
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course: {
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type: Object,
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required: true,
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},
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theme: {
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type: String,
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default: "normal",
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validator(value) {
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return ["normal", "accent"].includes(value);
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},
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},
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},
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template: `
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<article class="card" :style="theme === 'accent' ? 'border-color:#2d6cdf;' : ''">
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<course-badge :label="course.level"></course-badge>
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<h2>{{ course.title }}</h2>
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<p :class="{ done: course.finished }">
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{{ course.finished ? "已完成" : "学习中" }}
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</p>
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<button type="button" @click="$emit('toggle', course.id)">
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<slot name="action">操作</slot>
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</button>
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</article>
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`,
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};
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new Vue({
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el: "#app",
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components: {
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CourseCard,
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},
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data: {
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keyword: "",
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courses: [
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{ id: 1, title: "Vue 实例", finished: true, level: "基础" },
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{ id: 2, title: "模板语法", finished: false, level: "基础" },
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{ id: 3, title: "组件通信", finished: false, level: "进阶" },
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],
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},
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computed: {
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filteredCourses() {
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const value = this.keyword.trim().toLowerCase();
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if (!value) {
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return this.courses;
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}
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return this.courses.filter((course) => course.title.toLowerCase().includes(value));
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},
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},
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methods: {
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toggleCourse(courseId) {
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this.courses = this.courses.map((course) => {
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if (course.id === courseId) {
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return {
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...course,
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finished: !course.finished,
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};
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}
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return course;
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});
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},
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focusInput() {
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this.$refs.keywordInput.focus();
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},
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},
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});
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43
07-vue2/08-components-communication-and-final/starter.html
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43
07-vue2/08-components-communication-and-final/starter.html
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>组件通信与综合练习</title>
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<style>
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body { margin: 0; padding: 32px; font-family: "PingFang SC", sans-serif; background: #f4f7fb; }
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.wrap { max-width: 860px; margin: 0 auto; display: grid; gap: 16px; }
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.toolbar, .card { padding: 20px; border-radius: 18px; background: #fff; border: 1px solid #d9e3f2; }
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.list { display: grid; gap: 14px; }
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button { padding: 10px 14px; border: 0; border-radius: 999px; background: #2d6cdf; color: #fff; cursor: pointer; }
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input { width: 100%; padding: 12px; border-radius: 12px; border: 1px solid #cfd8e8; }
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.done { color: #1f8f54; }
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</style>
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</head>
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<body>
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<section id="app" class="wrap">
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<article class="toolbar">
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<h1>Vue2 综合练习</h1>
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<input ref="keywordInput" v-model="keyword" type="text" placeholder="输入关键字过滤课程" />
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<button type="button" @click="focusInput">聚焦输入框</button>
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</article>
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<section class="list">
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<course-card
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v-for="course in filteredCourses"
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:key="course.id"
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:course="course"
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theme="accent"
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@toggle="toggleCourse"
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>
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<template v-slot:action>
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切换完成状态
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</template>
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</course-card>
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</section>
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</section>
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<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
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<script src="./starter.js"></script>
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</body>
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</html>
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66
07-vue2/08-components-communication-and-final/starter.js
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66
07-vue2/08-components-communication-and-final/starter.js
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Vue.component("course-badge", {
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props: {
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label: {
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type: String,
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default: "默认角标",
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},
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},
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template: `<span style="display:inline-block;margin-bottom:8px;padding:4px 10px;border-radius:999px;background:#eef4ff;color:#2d6cdf;">{{ label }}</span>`,
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});
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const CourseCard = {
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props: {
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course: {
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type: Object,
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required: true,
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},
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theme: {
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type: String,
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default: "normal",
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validator(value) {
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return ["normal", "accent"].includes(value);
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},
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},
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},
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template: `
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<article class="card" :style="theme === 'accent' ? 'border-color:#2d6cdf;' : ''">
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<course-badge :label="course.level"></course-badge>
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<h2>{{ course.title }}</h2>
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<p :class="{ done: course.finished }">
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{{ course.finished ? "已完成" : "学习中" }}
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</p>
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<button type="button" @click="$emit('toggle', course.id)">
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<slot name="action">操作</slot>
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</button>
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</article>
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`,
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};
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new Vue({
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el: "#app",
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components: {
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CourseCard,
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},
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data: {
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keyword: "",
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courses: [
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{ id: 1, title: "Vue 实例", finished: true, level: "基础" },
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{ id: 2, title: "模板语法", finished: false, level: "基础" },
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{ id: 3, title: "组件通信", finished: false, level: "进阶" },
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],
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},
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computed: {
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filteredCourses() {
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// 任务：根据 keyword 过滤课程列表
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return this.courses;
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},
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},
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methods: {
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toggleCourse(courseId) {
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// 任务：根据 courseId 切换 finished
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},
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focusInput() {
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// 任务：通过 ref 聚焦输入框
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},
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},
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});
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