sanbuphy
47377646df
refactor(demos): improve variable box, scope, and type annotation demos style(demos): update visual styles and animations for better UX docs(browser-as-os): restructure content with tables and practical examples feat(demos): add new TypeScript and runtime environment demos
330 lines
7.2 KiB
Vue
330 lines
7.2 KiB
Vue
<script setup>
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import { ref } from 'vue'
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const basicStep = ref(0)
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const basicA = ref(10)
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const basicB = ref(null)
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const refStep = ref(0)
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const objData = ref({ age: 25 })
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const basicCopy = () => { basicB.value = basicA.value; basicStep.value = 1 }
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const basicModify = () => { basicB.value = 20; basicStep.value = 2 }
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const basicReset = () => { basicStep.value = 0; basicB.value = null }
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const refCopy = () => { refStep.value = 1 }
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const refModify = () => { objData.value.age = 30; refStep.value = 2 }
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const refSpread = () => { refStep.value = 3 }
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const refReset = () => { refStep.value = 0; objData.value.age = 25 }
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</script>
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<template>
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<div class="reference-demo">
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<div class="demo-title">🔄 值 vs 引用</div>
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<div class="compare-grid">
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<!-- 左侧：基本类型 -->
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<div class="compare-box">
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<div class="box-header blue">基本类型（复制值）</div>
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<div class="memory-area">
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<div class="vars-row">
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<div class="var-item" :class="{ active: basicStep >= 0 }">
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<span class="var-label">a</span>
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<span class="var-val">{{ basicA }}</span>
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</div>
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<div class="var-item" :class="{ active: basicStep >= 1, changed: basicStep >= 2 }">
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<span class="var-label">b</span>
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<span class="var-val">{{ basicB ?? '?' }}</span>
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</div>
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</div>
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<div class="copy-arrow" v-if="basicStep >= 1">↓ 复制值</div>
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</div>
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<div class="result-text" :class="basicStep === 2 ? 'success' : 'info'">
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{{ basicStep === 0 ? '点击复制' : basicStep === 1 ? 'b 得到 10' : '✅ 修改 b 不影响 a' }}
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</div>
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<div class="btn-group">
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<button @click="basicCopy" :disabled="basicStep >= 1">复制</button>
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<button @click="basicModify" :disabled="basicStep !== 1">改 b</button>
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<button @click="basicReset" class="reset">重置</button>
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</div>
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</div>
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<!-- 右侧：引用类型 -->
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<div class="compare-box">
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<div class="box-header orange">引用类型（复制地址）</div>
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<div class="memory-area">
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<div class="vars-row">
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<div class="var-item" :class="{ active: refStep >= 0 }">
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<span class="var-label">obj1</span>
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<span class="var-addr">0x001</span>
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</div>
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<div class="var-item" :class="{ active: refStep >= 1 }">
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<span class="var-label">obj2</span>
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<span class="var-addr">{{ refStep >= 1 ? '0x001' : '?' }}</span>
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</div>
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</div>
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<div class="data-box" :class="{ changed: refStep === 2, copied: refStep === 3 }">
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<div class="data-addr">0x001</div>
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<div class="data-content">{ age: {{ objData.age }} }</div>
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</div>
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<div class="copy-arrow" v-if="refStep >= 1">指向同一地址</div>
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</div>
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<div class="result-text" :class="refStep === 2 ? 'warning' : refStep === 3 ? 'success' : 'info'">
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{{ refStep === 0 ? '点击复制' : refStep === 1 ? '共享地址' : refStep === 2 ? '⚠️ 一改全变' : '✅ 已分离' }}
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</div>
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<div class="btn-group">
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<button @click="refCopy" :disabled="refStep >= 1">复制</button>
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<button @click="refModify" :disabled="refStep !== 1">修改</button>
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<button @click="refSpread" :disabled="refStep !== 2">展开</button>
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<button @click="refReset" class="reset">重置</button>
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</div>
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</div>
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</div>
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<div class="code-compare">
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<div class="code-col">
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<div class="code-title">基本类型</div>
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<pre><code>let a = 10
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let b = a // b=10
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b = 20 // a还是10</code></pre>
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</div>
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<div class="code-col">
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<div class="code-title">引用类型</div>
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<pre><code>let obj1 = {age:25}
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let obj2 = obj1
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obj2.age=30 // obj1也变了！
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// 用 {...obj1} 复制</code></pre>
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</div>
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</div>
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</div>
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</template>
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<style scoped>
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.reference-demo {
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border: 1px solid var(--vp-c-border);
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border-radius: 12px;
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padding: 20px;
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margin: 16px 0;
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background: var(--vp-c-bg);
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}
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.demo-title {
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font-size: 16px;
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font-weight: 600;
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color: var(--vp-c-text-1);
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margin-bottom: 16px;
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}
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.compare-grid {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 16px;
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margin-bottom: 16px;
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}
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@media (max-width: 768px) {
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.compare-grid {
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grid-template-columns: 1fr;
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}
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}
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.compare-box {
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border: 1px solid var(--vp-c-border);
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border-radius: 10px;
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padding: 16px;
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background: var(--vp-c-bg-soft);
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}
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.box-header {
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font-size: 13px;
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font-weight: 600;
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padding: 6px 10px;
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border-radius: 6px;
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margin-bottom: 12px;
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color: white;
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}
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.box-header.blue {
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background: #3b82f6;
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}
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.box-header.orange {
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background: #f59e0b;
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}
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.memory-area {
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background: var(--vp-c-bg);
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border-radius: 8px;
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padding: 12px;
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margin-bottom: 12px;
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}
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.vars-row {
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display: flex;
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gap: 12px;
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justify-content: center;
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margin-bottom: 8px;
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}
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.var-item {
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display: flex;
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flex-direction: column;
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align-items: center;
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padding: 8px 16px;
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border: 2px solid var(--vp-c-border);
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border-radius: 6px;
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opacity: 0.4;
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transition: all 0.3s;
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}
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.var-item.active {
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opacity: 1;
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border-color: #3b82f6;
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}
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.var-item.changed {
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border-color: #10b981;
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background: #ecfdf5;
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}
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.var-label {
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font-size: 11px;
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color: var(--vp-c-text-2);
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}
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.var-val, .var-addr {
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font-size: 18px;
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font-weight: 600;
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font-family: monospace;
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color: #3b82f6;
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}
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.var-addr {
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color: #8b5cf6;
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font-size: 14px;
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}
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.copy-arrow {
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text-align: center;
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font-size: 11px;
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color: var(--vp-c-text-2);
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padding: 4px;
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}
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.data-box {
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border: 2px solid #8b5cf6;
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border-radius: 6px;
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padding: 8px;
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text-align: center;
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background: #f3e8ff;
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margin-top: 8px;
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}
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.data-box.changed {
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border-color: #ef4444;
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background: #fee2e2;
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}
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.data-box.copied {
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border-color: #10b981;
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background: #d1fae5;
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}
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.data-addr {
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font-size: 10px;
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color: #6b7280;
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}
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.data-content {
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font-family: monospace;
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font-size: 13px;
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color: #374151;
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}
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.result-text {
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text-align: center;
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padding: 8px;
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border-radius: 6px;
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font-size: 12px;
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margin-bottom: 12px;
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}
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.result-text.info {
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background: #f3f4f6;
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color: #4b5563;
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}
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.result-text.success {
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background: #d1fae5;
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color: #065f46;
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}
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.result-text.warning {
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background: #fee2e2;
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color: #991b1b;
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}
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.btn-group {
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display: flex;
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gap: 6px;
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flex-wrap: wrap;
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justify-content: center;
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}
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.btn-group button {
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padding: 6px 12px;
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border: none;
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border-radius: 4px;
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font-size: 12px;
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cursor: pointer;
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background: #3b82f6;
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color: white;
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}
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.btn-group button:disabled {
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opacity: 0.4;
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cursor: not-allowed;
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}
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.btn-group button.reset {
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background: var(--vp-c-bg-alt);
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color: var(--vp-c-text-1);
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border: 1px solid var(--vp-c-border);
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}
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.code-compare {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 12px;
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}
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.code-col {
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background: #1e1e1e;
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border-radius: 8px;
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padding: 12px;
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}
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.code-title {
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color: #9ca3af;
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font-size: 11px;
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margin-bottom: 8px;
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}
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.code-col pre {
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margin: 0;
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}
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.code-col code {
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font-family: monospace;
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font-size: 11px;
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line-height: 1.5;
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color: #d4d4d4;
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}
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</style>
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