sanbuphy
d35211071a
- standardize border-radius from 8px to 6px for consistent styling - adjust padding values from 1rem to 0.75rem for better visual hierarchy - remove redundant overflow-y properties for cleaner code
326 lines
6.5 KiB
Vue
326 lines
6.5 KiB
Vue
<template>
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<div class="mobx-reactivity-demo">
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<div class="demo-header">
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<span class="icon">⚡</span>
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<span class="title">MobX 响应式原理</span>
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<span class="subtitle">自动追踪依赖的魔法</span>
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</div>
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<div class="intro-text">
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想象你在<span class="highlight">魔术表演</span>现场：魔术师（Observable）改变物品，所有盯着看的观众（Reaction）都会自动注意到变化，不需要一个个去通知他们。
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</div>
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<div class="demo-content">
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<div class="state-display">
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<div class="state-header">
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<span class="state-icon">📦</span>
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<span class="state-title">Observable 状态</span>
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</div>
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<div class="todo-list">
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<div
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v-for="todo in todos"
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:key="todo.id"
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class="todo-item"
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:class="{ completed: todo.completed, changed: recentlyChanged === todo.id }"
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@click="toggleTodo(todo.id)"
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>
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<span class="todo-status">{{ todo.completed ? '✓' : '○' }}</span>
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<span class="todo-text">{{ todo.text }}</span>
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</div>
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</div>
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</div>
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<div class="reaction-display">
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<div class="reaction-header">
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<span class="reaction-icon">🔄</span>
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<span class="reaction-title">自动响应</span>
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</div>
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<div class="reaction-stats">
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<div class="stat-item">
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<span class="stat-label">总计：</span>
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<span class="stat-value">{{ todos.length }} 项</span>
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</div>
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<div class="stat-item">
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<span class="stat-label">已完成：</span>
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<span class="stat-value completed">{{ completedCount }} 项</span>
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</div>
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</div>
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</div>
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<div class="interaction-area">
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<input v-model="newTodoText" placeholder="输入待办事项..." @keyup.enter="addTodo" class="todo-input" />
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<button @click="addTodo" class="add-btn">➕ 添加</button>
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</div>
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</div>
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<div class="info-box">
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<span class="icon">💡</span>
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<strong>核心思想：</strong>MobX 自动追踪状态和响应的关系，状态变化时自动触发相关更新。就像魔术，你只管改变数据，UI 会自动更新。
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</div>
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</div>
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</template>
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<script setup>
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import { ref, computed, watch } from 'vue'
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const todos = ref([
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{ id: 1, text: '学习 MobX', completed: false },
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{ id: 2, text: '理解响应式原理', completed: true }
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])
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const newTodoText = ref('')
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const recentlyChanged = ref(null)
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const completedCount = computed(() => {
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return todos.value.filter(t => t.completed).length
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})
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const addTodo = () => {
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if (!newTodoText.value.trim()) return
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const newTodo = {
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id: Date.now(),
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text: newTodoText.value,
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completed: false
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}
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todos.value.push(newTodo)
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recentlyChanged.value = newTodo.id
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newTodoText.value = ''
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setTimeout(() => {
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recentlyChanged.value = null
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}, 500)
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}
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const toggleTodo = (id) => {
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const todo = todos.value.find(t => t.id === id)
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if (todo) {
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todo.completed = !todo.completed
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recentlyChanged.value = id
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setTimeout(() => {
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recentlyChanged.value = null
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}, 500)
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}
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}
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</script>
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<style scoped>
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.mobx-reactivity-demo {
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border: 1px solid var(--vp-c-divider);
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border-radius: 6px;
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background: var(--vp-c-bg-soft);
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padding: 0.75rem;
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margin: 0.5rem 0;
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}
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.demo-header {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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margin-bottom: 0.75rem;
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}
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.demo-header .icon {
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font-size: 1.25rem;
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}
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.demo-header .title {
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font-weight: bold;
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font-size: 1rem;
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}
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.demo-header .subtitle {
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color: var(--vp-c-text-2);
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font-size: 0.85rem;
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margin-left: 0.5rem;
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}
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.intro-text {
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font-size: 0.9rem;
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color: var(--vp-c-text-2);
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line-height: 1.6;
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margin-bottom: 1rem;
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padding: 0.75rem;
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background: var(--vp-c-bg);
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border-radius: 6px;
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}
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.intro-text .highlight {
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color: var(--vp-c-brand-1);
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font-weight: 500;
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}
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.demo-content {
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display: flex;
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flex-direction: column;
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gap: 1rem;
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margin-bottom: 1rem;
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}
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.state-display,
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.reaction-display {
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background: var(--vp-c-bg);
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border: 2px solid var(--vp-c-divider);
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border-radius: 6px;
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padding: 0.75rem;
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}
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.state-header,
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.reaction-header {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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margin-bottom: 0.75rem;
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padding-bottom: 0.5rem;
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border-bottom: 1px solid var(--vp-c-divider);
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}
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.state-icon,
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.reaction-icon {
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font-size: 1.25rem;
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}
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.state-title,
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.reaction-title {
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font-weight: 600;
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font-size: 0.9rem;
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}
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.todo-list {
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display: flex;
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flex-direction: column;
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gap: 0.5rem;
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}
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.todo-item {
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display: flex;
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align-items: center;
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gap: 0.75rem;
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padding: 0.6rem 0.75rem;
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background: var(--vp-c-bg-soft);
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border-radius: 6px;
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cursor: pointer;
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transition: all 0.2s ease;
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}
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.todo-item:hover {
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background: var(--vp-c-bg);
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transform: translateX(4px);
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}
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.todo-item.completed {
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background: #f0fdf4;
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}
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.todo-item.completed .todo-text {
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text-decoration: line-through;
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color: var(--vp-c-text-3);
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}
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.todo-item.changed {
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animation: highlight 0.5s ease;
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}
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@keyframes highlight {
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0%, 100% { background: var(--vp-c-bg-soft); }
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50% { background: #fef3c7; }
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}
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.todo-status {
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font-size: 1.25rem;
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color: var(--vp-c-brand);
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}
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.todo-text {
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font-size: 0.9rem;
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color: var(--vp-c-text-1);
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}
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.reaction-stats {
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display: flex;
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gap: 1.5rem;
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}
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.stat-item {
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display: flex;
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gap: 0.5rem;
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font-size: 0.85rem;
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}
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.stat-label {
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color: var(--vp-c-text-2);
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}
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.stat-value {
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font-weight: 600;
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color: var(--vp-c-brand);
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}
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.stat-value.completed {
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color: #22c55e;
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}
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.interaction-area {
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display: flex;
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gap: 0.75rem;
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}
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.todo-input {
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flex: 1;
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padding: 0.6rem 1rem;
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border: 1px solid var(--vp-c-divider);
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border-radius: 6px;
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font-size: 0.9rem;
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background: var(--vp-c-bg);
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color: var(--vp-c-text-1);
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}
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.todo-input:focus {
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outline: none;
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border-color: var(--vp-c-brand);
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}
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.add-btn {
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padding: 0.6rem 1.5rem;
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background: var(--vp-c-brand);
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color: white;
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border: none;
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border-radius: 6px;
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font-size: 0.9rem;
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font-weight: 500;
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cursor: pointer;
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transition: all 0.2s ease;
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}
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.add-btn:hover {
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opacity: 0.9;
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transform: translateY(-1px);
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}
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.info-box {
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background: var(--vp-c-bg-alt);
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padding: 0.75rem;
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border-radius: 6px;
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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}
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.info-box .icon {
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margin-right: 0.25rem;
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}
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@media (max-width: 768px) {
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.interaction-area {
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flex-direction: column;
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}
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.reaction-stats {
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flex-direction: column;
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gap: 0.5rem;
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}
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}
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</style>
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