feat(docs): enhance JavaScript runtime and browser-as-os content

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
This commit is contained in:
sanbuphy
2026-02-17 01:39:59 +08:00
parent 9ee3312569
commit 47377646df
20 changed files with 8097 additions and 1310 deletions
@@ -76,15 +76,19 @@
<div class="code-line">obj2.x = 20</div>
<div class="code-line result">// obj1.x = 20 (变了!)</div>
</div>
<div class="visual-box">
<div class="ref-box">
<div>obj1 </div>
<div class="memory-box">{x: 20}</div>
</div>
<div class="arrow">指向同一位置</div>
<div class="ref-box">
<div>obj2 </div>
<div class="visual-box ref-visual">
<div class="ref-boxes">
<div class="ref-var-box">
<div class="ref-var-name">obj1</div>
<div class="ref-var-arrow"></div>
</div>
<div class="ref-var-box">
<div class="ref-var-name">obj2</div>
<div class="ref-var-arrow"></div>
</div>
</div>
<div class="arrow down-arrow">指向同一位置</div>
<div class="memory-box">{x: 20}</div>
</div>
</div>
</div>
@@ -469,6 +473,40 @@ const convertType = () => {
text-align: center;
}
/* 修复引用类型可视化 */
.ref-visual {
flex-direction: column;
gap: 0.75rem;
}
.ref-boxes {
display: flex;
gap: 2rem;
justify-content: center;
}
.ref-var-box {
display: flex;
align-items: center;
gap: 0.5rem;
}
.ref-var-name {
font-weight: 600;
color: var(--vp-c-text-1);
font-family: monospace;
}
.ref-var-arrow {
color: var(--vp-c-brand);
font-weight: bold;
}
.down-arrow {
color: var(--vp-c-brand);
font-size: 0.8rem;
}
.ref-types-list {
display: flex;
flex-direction: column;
@@ -1,140 +1,106 @@
<script setup>
import { ref } from 'vue'
// 基本类型
const basicStep = ref(0)
const basicA = ref(10)
const basicB = ref(null)
const basicStep = ref(0)
const basicMessage = ref('')
// 引用类型
const obj1Data = ref({ name: '张三', age: 25 })
const obj2Exists = ref(false)
const obj2Age = ref('')
const refMessage = ref('')
const refStep = ref(0)
const objData = ref({ age: 25 })
const basicCopy = () => {
basicB.value = basicA.value
basicStep.value = 1
basicMessage.value = '✅ 基本类型复制的是值本身'
}
const basicCopy = () => { basicB.value = basicA.value; basicStep.value = 1 }
const basicModify = () => { basicB.value = 20; basicStep.value = 2 }
const basicReset = () => { basicStep.value = 0; basicB.value = null }
const basicModify = () => {
if (basicB.value === null) {
basicMessage.value = '⚠️ 请先复制'
return
}
basicB.value = 20
basicMessage.value = '✅ 修改 b 不影响 a'
}
const refCopy = () => {
obj2Exists.value = true
obj2Age.value = obj1Data.value.age
refMessage.value = '⚠️ 两个变量指向同一份数据'
}
const refModify = () => {
if (!obj2Exists.value) {
refMessage.value = '⚠️ 请先复制'
return
}
obj1Data.value.age = 30
obj2Age.value = 30
refMessage.value = '❌ 两个变量指向同一份数据,改了一个另一个也变了!'
}
const refSpreadCopy = () => {
obj2Exists.value = true
obj2Age.value = 25
refMessage.value = '✅ 用展开运算符创建真正的副本,现在互不影响'
}
const refCopy = () => { refStep.value = 1 }
const refModify = () => { objData.value.age = 30; refStep.value = 2 }
const refSpread = () => { refStep.value = 3 }
const refReset = () => { refStep.value = 0; objData.value.age = 25 }
</script>
<template>
<div class="reference-demo">
<h3> vs 引用</h3>
<div class="demo-container">
<div class="demo-title">🔄 vs 引用</div>
<div class="compare-grid">
<!-- 左侧基本类型 -->
<div class="demo-section basic-section">
<h4>基本类型复制值</h4>
<div class="visualization">
<div class="box" :class="{ 'active': basicA !== null }">
<div class="box-label">a</div>
<div class="box-value">{{ basicA }}</div>
</div>
<div class="arrow" v-if="basicStep >= 1">
<div class="arrow-line"></div>
<div class="arrow-head"></div>
</div>
<div class="box" :class="{ 'active': basicB !== null }" v-if="basicStep >= 1">
<div class="box-label">b</div>
<div class="box-value">{{ basicB }}</div>
<div class="compare-box">
<div class="box-header blue">基本类型复制值</div>
<div class="memory-area">
<div class="vars-row">
<div class="var-item" :class="{ active: basicStep >= 0 }">
<span class="var-label">a</span>
<span class="var-val">{{ basicA }}</span>
</div>
<div class="var-item" :class="{ active: basicStep >= 1, changed: basicStep >= 2 }">
<span class="var-label">b</span>
<span class="var-val">{{ basicB ?? '?' }}</span>
</div>
</div>
<div class="copy-arrow" v-if="basicStep >= 1"> 复制值</div>
</div>
<div class="message" v-if="basicMessage">{{ basicMessage }}</div>
<div class="controls">
<button @click="basicCopy" class="btn-primary">let b = a复制</button>
<button @click="basicModify" class="btn-secondary">b = 20</button>
<div class="result-text" :class="basicStep === 2 ? 'success' : 'info'">
{{ basicStep === 0 ? '点击复制' : basicStep === 1 ? 'b 得到 10' : '✅ 修改 b 不影响 a' }}
</div>
<div class="btn-group">
<button @click="basicCopy" :disabled="basicStep >= 1">复制</button>
<button @click="basicModify" :disabled="basicStep !== 1"> b</button>
<button @click="basicReset" class="reset">重置</button>
</div>
</div>
<!-- 右侧引用类型 -->
<div class="demo-section reference-section">
<h4>引用类型复制地址</h4>
<div class="visualization">
<!-- 数据区 -->
<div class="data-area">
<div class="data-label">数据区</div>
<div class="data-content">
<div>{{ `{ name: "${obj1Data.name}", age: ${obj1Data.age} }` }}</div>
<div class="compare-box">
<div class="box-header orange">引用类型复制地址</div>
<div class="memory-area">
<div class="vars-row">
<div class="var-item" :class="{ active: refStep >= 0 }">
<span class="var-label">obj1</span>
<span class="var-addr">0x001</span>
</div>
<div class="var-item" :class="{ active: refStep >= 1 }">
<span class="var-label">obj2</span>
<span class="var-addr">{{ refStep >= 1 ? '0x001' : '?' }}</span>
</div>
</div>
<div class="pointers">
<div class="pointer">
<div class="pointer-label">obj1</div>
<div class="arrow-line-down"></div>
</div>
<div class="pointer" v-if="obj2Exists">
<div class="pointer-label">obj2</div>
<div class="arrow-line-down"></div>
</div>
<div class="data-box" :class="{ changed: refStep === 2, copied: refStep === 3 }">
<div class="data-addr">0x001</div>
<div class="data-content">{ age: {{ objData.age }} }</div>
</div>
<div class="copy-arrow" v-if="refStep >= 1">指向同一地址</div>
</div>
<div class="message" v-if="refMessage">{{ refMessage }}</div>
<div class="controls">
<button @click="refCopy" class="btn-primary">let obj2 = obj1复制</button>
<button @click="refModify" class="btn-danger">obj2.age = 30</button>
<button @click="refSpreadCopy" class="btn-success">用展开运算符创建副本</button>
<div class="result-text" :class="refStep === 2 ? 'warning' : refStep === 3 ? 'success' : 'info'">
{{ refStep === 0 ? '点击复制' : refStep === 1 ? '共享地址' : refStep === 2 ? '⚠️ 一改全变' : '✅ 已分离' }}
</div>
<div class="btn-group">
<button @click="refCopy" :disabled="refStep >= 1">复制</button>
<button @click="refModify" :disabled="refStep !== 1">修改</button>
<button @click="refSpread" :disabled="refStep !== 2">展开</button>
<button @click="refReset" class="reset">重置</button>
</div>
</div>
</div>
<div class="code-display">
<h4>代码</h4>
<pre><code>// 基本类型
let a = {{ basicA }}
{{ basicB !== null ? `let b = ${basicB}` : '' }}
{{ basicB !== null ? `b = ${basicB}` : '' }}
console.log(a) // {{ basicA }}
// 引用类型
let obj1 = { name: "{{ obj1Data.name }}", age: {{ obj1Data.age }} }
{{ obj2Exists ? 'let obj2 = obj1 // 指向同一份数据' : '' }}
{{ obj2Exists ? `obj2.age = ${obj1Data.age}` : '' }}
console.log(obj1.age) // {{ obj1Data.age }}
</code></pre>
<div class="code-compare">
<div class="code-col">
<div class="code-title">基本类型</div>
<pre><code>let a = 10
let b = a // b=10
b = 20 // a还是10</code></pre>
</div>
<div class="code-col">
<div class="code-title">引用类型</div>
<pre><code>let obj1 = {age:25}
let obj2 = obj1
obj2.age=30 // obj1也变了!
// 用 {...obj1} 复制</code></pre>
</div>
</div>
</div>
</template>
@@ -143,235 +109,221 @@ console.log(obj1.age) // {{ obj1Data.age }}
.reference-demo {
border: 1px solid var(--vp-c-border);
border-radius: 12px;
padding: 24px;
margin: 24px 0;
padding: 20px;
margin: 16px 0;
background: var(--vp-c-bg);
}
h3 {
margin: 0 0 20px 0;
font-size: 18px;
.demo-title {
font-size: 16px;
font-weight: 600;
color: var(--vp-c-text-1);
margin-bottom: 16px;
}
h4 {
margin: 0 0 16px 0;
font-size: 14px;
font-weight: 600;
color: var(--vp-c-text-2);
}
.demo-container {
.compare-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 24px;
margin-bottom: 24px;
gap: 16px;
margin-bottom: 16px;
}
@media (max-width: 768px) {
.demo-container {
.compare-grid {
grid-template-columns: 1fr;
}
}
.demo-section {
border: 1px dashed var(--vp-c-border);
border-radius: 8px;
padding: 20px;
.compare-box {
border: 1px solid var(--vp-c-border);
border-radius: 10px;
padding: 16px;
background: var(--vp-c-bg-soft);
}
.visualization {
display: flex;
align-items: center;
justify-content: center;
gap: 20px;
margin-bottom: 16px;
min-height: 120px;
.box-header {
font-size: 13px;
font-weight: 600;
padding: 6px 10px;
border-radius: 6px;
margin-bottom: 12px;
color: white;
}
.box {
width: 80px;
height: 80px;
border: 2px solid var(--vp-c-border);
border-radius: 8px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
.box-header.blue {
background: #3b82f6;
}
.box-header.orange {
background: #f59e0b;
}
.memory-area {
background: var(--vp-c-bg);
transition: all 0.3s ease;
border-radius: 8px;
padding: 12px;
margin-bottom: 12px;
}
.box.active {
border-color: var(--vp-c-brand-1);
box-shadow: 0 0 0 3px rgba(62, 175, 124, 0.1);
}
.box-label {
font-size: 12px;
font-weight: 600;
color: var(--vp-c-text-2);
margin-bottom: 4px;
}
.box-value {
font-size: 24px;
font-weight: 600;
font-family: 'Courier New', monospace;
color: var(--vp-c-brand-1);
}
.arrow {
.vars-row {
display: flex;
align-items: center;
gap: 4px;
}
.arrow-line {
width: 40px;
height: 2px;
background: var(--vp-c-brand-1);
}
.arrow-head {
font-size: 24px;
color: var(--vp-c-brand-1);
}
.data-area {
text-align: center;
}
.data-label {
font-size: 12px;
font-weight: 600;
color: var(--vp-c-text-2);
gap: 12px;
justify-content: center;
margin-bottom: 8px;
}
.data-content {
border: 2px solid var(--vp-c-brand-1);
border-radius: 8px;
padding: 12px;
background: var(--vp-c-bg);
font-family: 'Courier New', monospace;
font-size: 12px;
color: var(--vp-c-text-1);
}
.pointers {
.var-item {
display: flex;
gap: 24px;
margin-top: 12px;
flex-direction: column;
align-items: center;
padding: 8px 16px;
border: 2px solid var(--vp-c-border);
border-radius: 6px;
opacity: 0.4;
transition: all 0.3s;
}
.pointer {
text-align: center;
.var-item.active {
opacity: 1;
border-color: #3b82f6;
}
.pointer-label {
font-size: 12px;
font-weight: 600;
.var-item.changed {
border-color: #10b981;
background: #ecfdf5;
}
.var-label {
font-size: 11px;
color: var(--vp-c-text-2);
margin-bottom: 4px;
}
.arrow-line-down {
width: 2px;
height: 30px;
background: var(--vp-c-brand-1);
margin: 0 auto;
.var-val, .var-addr {
font-size: 18px;
font-weight: 600;
font-family: monospace;
color: #3b82f6;
}
.message {
.var-addr {
color: #8b5cf6;
font-size: 14px;
}
.copy-arrow {
text-align: center;
font-size: 11px;
color: var(--vp-c-text-2);
padding: 4px;
}
.data-box {
border: 2px solid #8b5cf6;
border-radius: 6px;
padding: 8px;
text-align: center;
background: #f3e8ff;
margin-top: 8px;
}
.data-box.changed {
border-color: #ef4444;
background: #fee2e2;
}
.data-box.copied {
border-color: #10b981;
background: #d1fae5;
}
.data-addr {
font-size: 10px;
color: #6b7280;
}
.data-content {
font-family: monospace;
font-size: 13px;
color: #374151;
}
.result-text {
text-align: center;
padding: 8px;
border-radius: 6px;
font-size: 12px;
margin-bottom: 12px;
font-size: 13px;
font-weight: 500;
background: var(--vp-c-bg-soft);
color: var(--vp-c-text-1);
}
.controls {
.result-text.info {
background: #f3f4f6;
color: #4b5563;
}
.result-text.success {
background: #d1fae5;
color: #065f46;
}
.result-text.warning {
background: #fee2e2;
color: #991b1b;
}
.btn-group {
display: flex;
gap: 8px;
gap: 6px;
flex-wrap: wrap;
justify-content: center;
}
button {
.btn-group button {
padding: 6px 12px;
border: none;
border-radius: 6px;
font-size: 13px;
font-weight: 500;
border-radius: 4px;
font-size: 12px;
cursor: pointer;
transition: all 0.2s ease;
}
button:active {
transform: scale(0.95);
}
.btn-primary {
background: var(--vp-c-brand-1);
background: #3b82f6;
color: white;
}
.btn-primary:hover {
background: var(--vp-c-brand-2);
.btn-group button:disabled {
opacity: 0.4;
cursor: not-allowed;
}
.btn-secondary {
background: var(--vp-c-bg-soft);
.btn-group button.reset {
background: var(--vp-c-bg-alt);
color: var(--vp-c-text-1);
border: 1px solid var(--vp-c-border);
}
.btn-secondary:hover {
background: var(--vp-c-bg-soft-hover);
.code-compare {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 12px;
}
.btn-danger {
background: #f56565;
color: white;
}
.btn-danger:hover {
background: #e53e3e;
}
.btn-success {
background: #38a169;
color: white;
}
.btn-success:hover {
background: #2f855a;
}
.code-display {
.code-col {
background: #1e1e1e;
border-radius: 8px;
padding: 16px;
overflow-x: auto;
padding: 12px;
}
.code-display h4 {
color: #d4d4d4;
margin-bottom: 12px;
.code-title {
color: #9ca3af;
font-size: 11px;
margin-bottom: 8px;
}
.code-display pre {
.code-col pre {
margin: 0;
}
.code-display code {
font-family: 'Courier New', monospace;
font-size: 13px;
line-height: 1.6;
.code-col code {
font-family: monospace;
font-size: 11px;
line-height: 1.5;
color: #d4d4d4;
}
</style>
@@ -1,7 +1,7 @@
<script setup>
import { ref } from 'vue'
const activeScope = ref('block') // 'global', 'function', 'block'
const activeScope = ref('global')
const explanation = ref('')
const scopes = [
@@ -9,31 +9,36 @@ const scopes = [
id: 'global',
name: '全局作用域',
color: '#a0aec0',
variables: ['appName = "Todo"'],
canSee: ['appName']
vars: [{ name: 'appName', value: '"Todo"', own: true }]
},
{
id: 'function',
name: '函数 greet() 作用域',
color: '#4299e1',
variables: ['message = "你好"'],
canSee: ['appName', 'message']
vars: [
{ name: 'appName', value: '"Todo"', own: false, from: '全局' },
{ name: 'message', value: '"你好"', own: true }
]
},
{
id: 'block',
name: 'if 块作用域',
color: '#38a169',
variables: ['greeting = message + appName'],
canSee: ['appName', 'message', 'greeting']
vars: [
{ name: 'appName', value: '"Todo"', own: false, from: '全局' },
{ name: 'message', value: '"你好"', own: false, from: '函数' },
{ name: 'greeting', value: 'message+appName', own: true }
]
}
]
const updateExplanation = () => {
const scope = scopes.find(s => s.id === activeScope.value)
if (scope) {
const visible = scope.canSee.map(v => `${v}`).join('、')
explanation.value = `在这个位置,你能使用这些变量:${visible}`
const texts = {
global: '在全局作用域,只能使用全局变量 appName',
function: '在函数作用域,可以使用自己的 message 和全局的 appName(作用域链查找)',
block: '在块级作用域,可以使用自己的 greeting,以及外层的 message 和 appName'
}
explanation.value = texts[activeScope.value]
}
updateExplanation()
@@ -41,67 +46,54 @@ updateExplanation()
<template>
<div class="scope-demo">
<h3>作用域变量的"可见范围"</h3>
<h3>🔍 作用域变量的"可见范围"</h3>
<div class="scopes-container">
<!-- 全局作用域 -->
<div
class="scope global-scope"
:class="{ 'active': activeScope === 'global' }"
@click="activeScope = 'global'; updateExplanation()"
<div class="scope-selector">
<button
v-for="scope in scopes"
:key="scope.id"
@click="activeScope = scope.id; updateExplanation()"
class="scope-btn"
:class="{ active: activeScope === scope.id }"
:style="{ borderColor: scope.color }"
>
<div class="scope-header">全局作用域</div>
<div class="scope-content">
<div class="variable" :class="{ 'visible': activeScope === 'global', 'dimmed': activeScope !== 'global' }">
appName = "Todo"
{{ scope.name }}
</button>
</div>
<div class="scope-visual">
<!-- 作用域层级图 -->
<div class="scope-levels">
<div
v-for="(scope, index) in scopes"
:key="scope.id"
class="level"
:class="{ active: activeScope === scope.id, dimmed: activeScope !== scope.id }"
:style="{ borderLeftColor: scope.color }"
>
<div class="level-header" :style="{ color: scope.color }">
{{ scope.name }}
</div>
<!-- 函数作用域 -->
<div class="nested-scope">
<div class="level-vars">
<div
class="scope function-scope"
:class="{ 'active': activeScope === 'function' }"
@click.stop="activeScope = 'function'; updateExplanation()"
v-for="v in scope.vars"
:key="v.name"
class="var-tag"
:class="{ own: v.own, inherited: !v.own }"
>
<div class="scope-header">函数 greet() 作用域</div>
<div class="scope-content">
<div class="variable" :class="{ 'visible': ['global', 'function'].includes(activeScope), 'dimmed': !['global', 'function'].includes(activeScope) }">
appName = "Todo"
</div>
<div class="variable" :class="{ 'visible': activeScope === 'function', 'dimmed': activeScope !== 'function' }">
message = "你好"
</div>
<!-- 块级作用域 -->
<div class="nested-scope">
<div
class="scope block-scope"
:class="{ 'active': activeScope === 'block' }"
@click.stop="activeScope = 'block'; updateExplanation()"
>
<div class="scope-header">if 块作用域</div>
<div class="scope-content">
<div class="variable" :class="{ 'visible': true, 'dimmed': false }">
appName = "Todo"
</div>
<div class="variable" :class="{ 'visible': true, 'dimmed': false }">
message = "你好"
</div>
<div class="variable" :class="{ 'visible': activeScope === 'block', 'dimmed': activeScope !== 'block' }">
greeting = message + appName
</div>
</div>
</div>
</div>
</div>
<span class="var-name">{{ v.name }}</span>
<span class="var-value">= {{ v.value }}</span>
<span v-if="!v.own" class="var-from"> {{ v.from }}</span>
</div>
</div>
</div>
</div>
</div>
<div class="explanation" v-if="explanation">
{{ explanation }}
<!-- 说明 -->
<div class="explanation-box">
<div class="explanation-title">💡 当前位置可见的变量</div>
<div class="explanation-text">{{ explanation }}</div>
</div>
</div>
<div class="code-display">
@@ -112,7 +104,7 @@ function greet() {
const message = "你好" // 函数作用域
if (true) {
const greeting = message + appName // 块级作用域 ✅ 能看到外层的
const greeting = message + appName // 块级作用域
console.log(greeting)
}
@@ -138,112 +130,133 @@ h3 {
color: var(--vp-c-text-1);
}
.scopes-container {
.scope-selector {
display: flex;
justify-content: center;
gap: 12px;
margin-bottom: 20px;
flex-wrap: wrap;
}
.scope {
border: 3px solid var(--vp-c-border);
border-radius: 12px;
padding: 20px;
.scope-btn {
padding: 10px 16px;
border: 2px solid var(--vp-c-border);
border-radius: 8px;
background: var(--vp-c-bg);
color: var(--vp-c-text-1);
font-size: 14px;
cursor: pointer;
transition: all 0.3s ease;
transition: all 0.2s ease;
}
.scope-btn:hover {
background: var(--vp-c-bg-soft);
}
.scope:hover {
border-color: var(--vp-c-brand-1);
transform: scale(1.02);
.scope-btn.active {
background: var(--vp-c-brand-soft);
border-color: var(--vp-c-brand);
}
.scope.active {
border-width: 4px;
box-shadow: 0 0 0 4px rgba(62, 175, 124, 0.1);
.scope-visual {
display: grid;
grid-template-columns: 2fr 1fr;
gap: 20px;
margin-bottom: 20px;
}
.global-scope {
border-color: #a0aec0;
@media (max-width: 768px) {
.scope-visual {
grid-template-columns: 1fr;
}
}
.global-scope.active {
border-color: #a0aec0;
box-shadow: 0 0 0 4px rgba(160, 174, 192, 0.2);
}
.function-scope {
border-color: #4299e1;
}
.function-scope.active {
border-color: #4299e1;
box-shadow: 0 0 0 4px rgba(66, 153, 225, 0.2);
}
.block-scope {
border-color: #38a169;
}
.block-scope.active {
border-color: #38a169;
box-shadow: 0 0 0 4px rgba(56, 161, 105, 0.2);
}
.scope-header {
font-size: 12px;
font-weight: 600;
margin-bottom: 12px;
text-align: center;
}
.scope-content {
.scope-levels {
display: flex;
flex-direction: column;
gap: 12px;
}
.level {
border-left: 4px solid;
padding: 12px 16px;
background: var(--vp-c-bg-soft);
border-radius: 0 8px 8px 0;
transition: all 0.3s ease;
}
.level.active {
background: var(--vp-c-bg);
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
.level.dimmed {
opacity: 0.6;
}
.level-header {
font-weight: 600;
font-size: 14px;
margin-bottom: 8px;
}
.level-vars {
display: flex;
flex-wrap: wrap;
gap: 8px;
}
.nested-scope {
.var-tag {
display: flex;
justify-content: center;
margin-top: 12px;
}
.variable {
padding: 8px 12px;
border-radius: 6px;
align-items: center;
gap: 4px;
padding: 4px 10px;
border-radius: 4px;
font-size: 13px;
font-family: 'Courier New', monospace;
font-size: 12px;
font-weight: 500;
background: var(--vp-c-bg);
transition: all 0.3s ease;
}
.variable.visible {
color: var(--vp-c-text-1);
.var-tag.own {
background: var(--vp-c-brand-soft);
border: 1px solid var(--vp-c-brand);
}
.var-tag.inherited {
background: var(--vp-c-bg-alt);
border: 1px dashed var(--vp-c-border);
}
.var-name {
font-weight: 600;
}
.variable.dimmed {
color: var(--vp-c-text-3);
opacity: 0.5;
}
.explanation {
text-align: center;
padding: 12px;
border-radius: 8px;
margin-bottom: 20px;
font-size: 14px;
font-weight: 500;
background: var(--vp-c-bg-soft);
color: var(--vp-c-text-1);
animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
from { opacity: 0; transform: translateY(-10px); }
to { opacity: 1; transform: translateY(0); }
.var-value {
color: var(--vp-c-text-2);
}
.var-from {
font-size: 11px;
color: var(--vp-c-text-3);
font-style: italic;
}
.explanation-box {
background: var(--vp-c-brand-soft);
border-radius: 8px;
padding: 16px;
}
.explanation-title {
font-weight: 600;
color: var(--vp-c-brand);
margin-bottom: 8px;
font-size: 14px;
}
.explanation-text {
color: var(--vp-c-text-1);
font-size: 14px;
line-height: 1.6;
}
.code-display {
@@ -270,15 +283,4 @@ h3 {
line-height: 1.6;
color: #d4d4d4;
}
@media (max-width: 768px) {
.scopes-container {
flex-direction: column;
align-items: center;
}
.scope {
min-width: 280px;
}
}
</style>
@@ -5,85 +5,80 @@ const name = ref('张三')
const age = ref(25)
const isStudent = ref(true)
const showMessage = ref('')
const showSuccess = ref(false)
const messageType = ref('')
let messageTimer = null
const clearMessage = () => {
showMessage.value = ''
messageType.value = ''
}
const setMessage = (msg, type) => {
if (messageTimer) clearTimeout(messageTimer)
showMessage.value = msg
messageType.value = type
messageTimer = setTimeout(() => clearMessage(), 2000)
}
const modifyAge = () => {
age.value = 26
showMessage.value = '✅ let 变量可以修改'
showSuccess.value = true
setTimeout(() => {
showMessage.value = ''
showSuccess.value = false
}, 2000)
setMessage('✅ let 可以修改', 'success')
}
const modifyName = () => {
showMessage.value = '❌ const 不能重新赋值'
showSuccess.value = false
setTimeout(() => {
showMessage.value = ''
}, 2000)
setMessage('❌ const 不能改', 'error')
}
const reset = () => {
name.value = '张三'
age.value = 25
isStudent.value = true
showMessage.value = ''
clearMessage()
}
const codeLines = ref([
`const name = "张三"`,
`let age = 25`,
`const isStudent = true`
])
const executeCode = ref([])
</script>
<template>
<div class="variable-box-demo">
<h3>变量就像带名字的盒子</h3>
<div class="demo-header">
<span class="title">📦 变量就像带名字的盒子</span>
</div>
<div class="boxes-container">
<!-- 盒子 1: const name -->
<div class="variable-box const-box">
<div class="box-label">const name</div>
<div class="boxes-row">
<div class="var-box" :class="{ error: messageType === 'error' }">
<div class="box-tag const">const</div>
<div class="box-name">name</div>
<div class="box-value">{{ name }}</div>
<div class="box-icon">🔒</div>
<div class="box-lock">🔒</div>
</div>
<!-- 盒子 2: let age -->
<div class="variable-box let-box" :class="{ 'success': showSuccess && age === 26 }">
<div class="box-label">let age</div>
<div class="var-box" :class="{ success: messageType === 'success' }">
<div class="box-tag let">let</div>
<div class="box-name">age</div>
<div class="box-value">{{ age }}</div>
<div class="box-icon">🔓</div>
<div class="box-lock">🔓</div>
</div>
<!-- 盒子 3: const isStudent -->
<div class="variable-box const-box">
<div class="box-label">const isStudent</div>
<div class="var-box">
<div class="box-tag const">const</div>
<div class="box-name">isStudent</div>
<div class="box-value">{{ isStudent }}</div>
<div class="box-icon">🔒</div>
<div class="box-lock">🔒</div>
</div>
</div>
<div class="message-bubble" :class="{ 'error': !showSuccess, 'success': showSuccess }" v-if="showMessage">
<div class="message" v-if="showMessage" :class="messageType">
{{ showMessage }}
</div>
<div class="controls">
<button @click="modifyAge" class="btn-primary">修改 age 26</button>
<button @click="modifyName" class="btn-danger">修改 name 为李四</button>
<button @click="reset" class="btn-secondary">重置</button>
<button @click="modifyAge" class="btn btn-primary">修改 age</button>
<button @click="modifyName" class="btn btn-danger">修改 name</button>
<button @click="reset" class="btn btn-secondary">重置</button>
</div>
<div class="code-display">
<pre><code>const name = "张三"
let age = 25
const isStudent = true
{{ executeCode.join('\n') }}</code></pre>
<div class="code-snippet">
<code>const name = "{{ name }}"</code>
<code>let age = {{ age }}</code>
</div>
</div>
</template>
@@ -92,42 +87,59 @@ const isStudent = true
.variable-box-demo {
border: 1px solid var(--vp-c-border);
border-radius: 12px;
padding: 24px;
margin: 24px 0;
padding: 20px;
margin: 16px 0;
background: var(--vp-c-bg);
}
h3 {
margin: 0 0 16px 0;
font-size: 18px;
.demo-header {
margin-bottom: 16px;
}
.title {
font-size: 16px;
font-weight: 600;
color: var(--vp-c-text-1);
}
.boxes-container {
.boxes-row {
display: flex;
gap: 16px;
justify-content: center;
margin-bottom: 20px;
margin-bottom: 16px;
flex-wrap: wrap;
}
.variable-box {
position: relative;
width: 120px;
height: 120px;
.var-box {
width: 100px;
height: 100px;
border: 2px solid var(--vp-c-border);
border-radius: 12px;
border-radius: 10px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
position: relative;
background: var(--vp-c-bg);
transition: all 0.3s ease;
}
.variable-box.success {
border-color: #3eaf7c;
animation: pulse 0.5s ease;
.var-box.error {
border-color: #ef4444;
background: #fef2f2;
animation: shake 0.4s ease;
}
.var-box.success {
border-color: #10b981;
background: #ecfdf5;
animation: pulse 0.4s ease;
}
@keyframes shake {
0%, 100% { transform: translateX(0); }
25% { transform: translateX(-4px); }
75% { transform: translateX(4px); }
}
@keyframes pulse {
@@ -135,144 +147,107 @@ h3 {
50% { transform: scale(1.05); }
}
.box-label {
.box-tag {
position: absolute;
top: -12px;
left: 50%;
transform: translateX(-50%);
background: var(--vp-c-brand-1);
top: -10px;
padding: 2px 8px;
border-radius: 10px;
font-size: 10px;
font-weight: 600;
color: white;
padding: 4px 12px;
border-radius: 12px;
font-size: 12px;
font-weight: 500;
white-space: nowrap;
}
.let-box .box-label {
background: #42b983;
.box-tag.const {
background: #3b82f6;
}
.box-tag.let {
background: #10b981;
}
.box-name {
font-size: 13px;
color: var(--vp-c-text-2);
margin-bottom: 4px;
}
.box-value {
font-size: 24px;
font-size: 20px;
font-weight: 600;
font-family: 'Courier New', monospace;
font-family: monospace;
color: var(--vp-c-text-1);
margin-bottom: 8px;
}
.box-icon {
font-size: 16px;
.box-lock {
position: absolute;
bottom: 8px;
font-size: 12px;
}
.message-bubble {
.message {
text-align: center;
padding: 12px;
border-radius: 8px;
margin-bottom: 20px;
font-size: 14px;
padding: 10px;
border-radius: 6px;
margin-bottom: 12px;
font-size: 13px;
font-weight: 500;
animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
from { opacity: 0; transform: translateY(-10px); }
to { opacity: 1; transform: translateY(0); }
.message.error {
background: #fef2f2;
color: #dc2626;
}
.message-bubble.error {
background: #fee;
color: #c00;
}
.message-bubble.success {
background: #e8f5e9;
color: #2e7d32;
.message.success {
background: #ecfdf5;
color: #059669;
}
.controls {
display: flex;
gap: 12px;
gap: 8px;
justify-content: center;
flex-wrap: wrap;
margin-bottom: 20px;
margin-bottom: 12px;
}
button {
padding: 8px 16px;
.btn {
padding: 8px 14px;
border: none;
border-radius: 6px;
font-size: 14px;
font-size: 13px;
font-weight: 500;
cursor: pointer;
transition: all 0.2s ease;
}
button:active {
transform: scale(0.95);
transition: all 0.2s;
}
.btn-primary {
background: var(--vp-c-brand-1);
background: #3b82f6;
color: white;
}
.btn-primary:hover {
background: var(--vp-c-brand-2);
}
.btn-danger {
background: #f56565;
background: #ef4444;
color: white;
}
.btn-danger:hover {
background: #e53e3e;
}
.btn-secondary {
background: var(--vp-c-bg-soft);
color: var(--vp-c-text-1);
border: 1px solid var(--vp-c-border);
}
.btn-secondary:hover {
background: var(--vp-c-bg-soft-hover);
}
.code-display {
.code-snippet {
background: #1e1e1e;
border-radius: 8px;
padding: 16px;
overflow-x: auto;
border-radius: 6px;
padding: 10px 14px;
display: flex;
flex-direction: column;
gap: 4px;
}
.code-display pre {
margin: 0;
}
.code-display code {
font-family: 'Courier New', monospace;
font-size: 13px;
line-height: 1.6;
.code-snippet code {
font-family: monospace;
font-size: 12px;
color: #d4d4d4;
}
@media (max-width: 640px) {
.boxes-container {
flex-direction: column;
align-items: center;
}
.variable-box {
width: 200px;
}
.controls {
flex-direction: column;
}
button {
width: 100%;
}
}
</style>