132 lines
4.9 KiB
Vue
132 lines
4.9 KiB
Vue
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<template>
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<div class="static-vs-dynamic-demo">
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<h4>🔍 静态类型 vs 动态类型：实时对比</h4>
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<p class="desc">选择一段代码，观察两种类型系统的不同行为</p>
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<div class="example-selector">
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<button
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v-for="(ex, i) in examples"
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:key="i"
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:class="['ex-btn', { active: selected === i }]"
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@click="selected = i"
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>
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{{ ex.label }}
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</button>
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</div>
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<div class="comparison">
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<div class="panel static-panel">
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<div class="panel-header">
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<span class="badge">静态类型（TypeScript）</span>
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<span class="timing">⏱ 编译时检查</span>
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</div>
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<pre class="code-block">{{ examples[selected].staticCode }}</pre>
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<div :class="['result', examples[selected].staticOk ? 'ok' : 'err']">
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{{ examples[selected].staticResult }}
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</div>
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</div>
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<div class="vs">VS</div>
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<div class="panel dynamic-panel">
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<div class="panel-header">
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<span class="badge dynamic">动态类型（JavaScript）</span>
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<span class="timing">⏱ 运行时检查</span>
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</div>
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<pre class="code-block">{{ examples[selected].dynamicCode }}</pre>
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<div :class="['result', examples[selected].dynamicOk ? 'ok' : 'err']">
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{{ examples[selected].dynamicResult }}
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</div>
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</div>
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</div>
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<div class="insight">
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💡 {{ examples[selected].insight }}
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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 } from 'vue'
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const selected = ref(0)
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const examples = [
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{
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label: '变量赋值',
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staticCode: `let name: string = "Alice"
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name = 42 // ❌ 编译错误`,
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dynamicCode: `let name = "Alice"
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name = 42 // ✅ 没问题`,
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staticResult: '❌ Type "number" is not assignable to type "string"',
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dynamicResult: '✅ 运行正常，name 变成了 42',
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staticOk: false,
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dynamicOk: true,
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insight: '静态类型在你写代码时就发现错误，动态类型要等到运行时才知道。'
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},
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{
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label: '函数参数',
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staticCode: `function add(a: number, b: number) {
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return a + b
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}
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add("1", 2) // ❌ 编译错误`,
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dynamicCode: `function add(a, b) {
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return a + b
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}
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add("1", 2) // ✅ 返回 "12"`,
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staticResult: '❌ Argument of type "string" is not assignable to parameter of type "number"',
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dynamicResult: '✅ 返回 "12"（字符串拼接，不是数学加法！）',
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staticOk: false,
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dynamicOk: true,
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insight: '动态类型的"灵活"有时是 bug 的温床——你期望 3，却得到 "12"。'
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},
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{
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label: '属性访问',
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staticCode: `interface User { name: string }
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let user: User = { name: "Bob" }
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console.log(user.age) // ❌ 编译错误`,
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dynamicCode: `let user = { name: "Bob" }
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console.log(user.age) // ✅ 输出 undefined`,
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staticResult: '❌ Property "age" does not exist on type "User"',
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dynamicResult: '✅ 输出 undefined（不报错，但可能导致后续逻辑出错）',
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staticOk: false,
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dynamicOk: true,
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insight: '静态类型能在编译时捕获拼写错误和属性缺失，动态类型只会默默返回 undefined。'
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}
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]
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</script>
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<style scoped>
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.static-vs-dynamic-demo {
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padding: 20px;
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border: 1px solid var(--vp-c-divider);
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border-radius: 12px;
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margin: 16px 0;
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background: var(--vp-c-bg-soft);
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}
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h4 { margin: 0 0 4px; }
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.desc { color: var(--vp-c-text-2); font-size: 14px; margin: 0 0 16px; }
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.example-selector { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
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.ex-btn {
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padding: 6px 14px; border-radius: 6px; border: 1px solid var(--vp-c-divider);
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background: var(--vp-c-bg); cursor: pointer; font-size: 13px; transition: all 0.2s;
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}
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.ex-btn.active { background: var(--vp-c-brand-1); color: #fff; border-color: var(--vp-c-brand-1); }
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.comparison { display: flex; gap: 12px; align-items: stretch; }
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.panel { flex: 1; border-radius: 8px; border: 1px solid var(--vp-c-divider); background: var(--vp-c-bg); overflow: hidden; }
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.panel-header { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; background: var(--vp-c-bg-soft); border-bottom: 1px solid var(--vp-c-divider); }
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.badge { font-size: 12px; font-weight: 600; color: var(--vp-c-brand-1); }
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.badge.dynamic { color: #e5a00d; }
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.timing { font-size: 11px; color: var(--vp-c-text-3); }
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.code-block { padding: 12px; margin: 0; font-size: 12px; line-height: 1.6; white-space: pre-wrap; overflow-x: auto; }
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.result { padding: 8px 12px; font-size: 12px; border-top: 1px solid var(--vp-c-divider); }
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.result.ok { background: #f0fdf4; color: #166534; }
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.result.err { background: #fef2f2; color: #991b1b; }
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.vs { display: flex; align-items: center; font-weight: 700; color: var(--vp-c-text-3); font-size: 14px; }
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.insight { margin-top: 12px; padding: 10px 14px; background: var(--vp-c-brand-soft); border-radius: 8px; font-size: 13px; }
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@media (max-width: 640px) {
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.comparison { flex-direction: column; }
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.vs { justify-content: center; padding: 4px 0; }
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}
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</style>
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