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Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>
217 lines
7.1 KiB
Plaintext
217 lines
7.1 KiB
Plaintext
---
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title: "React"
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description: "使用 JSX、状态和客户端逻辑，在你的 Mintlify 文档中通过自定义 React 组件构建交互且可复用的元素。"
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keywords: ["React 组件", "交互式组件", "JSX", "自定义组件"]
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boost: 3
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---
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import { ColorGenerator } from "/snippets/color-generator.jsx";
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直接在 MDX 文件中使用 [React 组件](https://react.dev) 和 [hooks](https://react.dev/reference/react/hooks) 在文档中构建交互式元素。
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<div id="inline-components">
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## 内联组件
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</div>
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直接在你的 MDX 文件中声明组件：
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export const Counter = () => {
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const [count, setCount] = useState(0)
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const increment = () => setCount(count + 1)
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const decrement = () => setCount(count - 1)
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return (
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<div className="flex items-center justify-center">
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<div className="flex items-center rounded-xl overflow-hidden border border-zinc-950/20 dark:border-white/20">
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<button
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onClick={decrement}
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className="flex items-center justify-center h-8 w-8 text-zinc-950/80 dark:text-white/80 border-r border-zinc-950/20 dark:border-white/20"
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aria-label="Decrease"
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>
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-
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</button>
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<div className="flex text-sm items-center justify-center h-8 px-6 text-zinc-950/80 dark:text-white/80 font-medium min-w-[4rem] text-center">
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{count}
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</div>
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<button
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onClick={increment}
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className="flex items-center justify-center h-8 w-8 text-zinc-950/80 dark:text-white/80 border-l border-zinc-950/20 dark:border-white/20"
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aria-label="Increase"
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>
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+
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</button>
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</div>
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</div>
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)
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}
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<Counter />
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```mdx
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export const Counter = () => {
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const [count, setCount] = useState(0)
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const increment = () => setCount(count + 1)
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const decrement = () => setCount(count - 1)
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return (
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<div>
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<button onClick={decrement}>-</button>
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<span>{count}</span>
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<button onClick={increment}>+</button>
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</div>
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)
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}
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<Counter />
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```
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<div id="import-components">
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## 导入组件
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</div>
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组件文件必须位于 `/snippets/` 文件夹中。更多信息请参阅 [可复用片段](/zh/create/reusable-snippets)。
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<Note>
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不支持嵌套导入。请将所有被引用的组件直接导入到父 MDX 文件中。
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</Note>
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在 `snippets/` 中创建一个组件文件：
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```mdx /snippets/color-generator.jsx [expandable]
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export const ColorGenerator = () => {
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const [hue, setHue] = useState(180)
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const [saturation, setSaturation] = useState(50)
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const [lightness, setLightness] = useState(50)
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const [colors, setColors] = useState([])
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useEffect(() => {
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const newColors = []
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for (let i = 0; i < 5; i++) {
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const l = Math.max(10, Math.min(90, lightness - 20 + i * 10))
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newColors.push(`hsl(${hue}, ${saturation}%, ${l}%)`)
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}
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setColors(newColors)
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}, [hue, saturation, lightness])
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const copyToClipboard = (color) => {
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navigator.clipboard
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.writeText(color)
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.then(() => {
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console.log(`Copied ${color} to clipboard!`)
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})
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.catch((err) => {
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console.error("Failed to copy: ", err)
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})
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}
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return (
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<div className="p-4 border dark:border-zinc-950/80 rounded-xl not-prose">
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<div className="space-y-4">
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<div className="space-y-2">
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<label className="block text-sm text-zinc-950/70 dark:text-white/70">
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Hue: {hue}°
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<input
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type="range"
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min="0"
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max="360"
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value={hue}
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onChange={(e) => setHue(Number.parseInt(e.target.value))}
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className="w-full h-2 bg-zinc-950/20 rounded-lg appearance-none cursor-pointer dark:bg-white/20 mt-1"
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style={{
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background: `linear-gradient(to right,
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hsl(0, ${saturation}%, ${lightness}%),
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hsl(60, ${saturation}%, ${lightness}%),
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hsl(120, ${saturation}%, ${lightness}%),
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hsl(180, ${saturation}%, ${lightness}%),
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hsl(240, ${saturation}%, ${lightness}%),
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hsl(300, ${saturation}%, ${lightness}%),
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hsl(360, ${saturation}%, ${lightness}%))`,
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}}
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/>
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</label>
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<label className="block text-sm text-zinc-950/70 dark:text-white/70">
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Saturation: {saturation}%
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<input
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type="range"
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min="0"
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max="100"
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value={saturation}
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onChange={(e) => setSaturation(Number.parseInt(e.target.value))}
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className="w-full h-2 bg-zinc-950/20 rounded-lg appearance-none cursor-pointer dark:bg-white/20 mt-1"
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style={{
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background: `linear-gradient(to right,
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hsl(${hue}, 0%, ${lightness}%),
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hsl(${hue}, 50%, ${lightness}%),
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hsl(${hue}, 100%, ${lightness}%))`,
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}}
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/>
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</label>
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<label className="block text-sm text-zinc-950/70 dark:text-white/70">
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Lightness: {lightness}%
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<input
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type="range"
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min="0"
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max="100"
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value={lightness}
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onChange={(e) => setLightness(Number.parseInt(e.target.value))}
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className="w-full h-2 bg-zinc-950/20 rounded-lg appearance-none cursor-pointer dark:bg-white/20 mt-1"
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style={{
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background: `linear-gradient(to right,
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hsl(${hue}, ${saturation}%, 0%),
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hsl(${hue}, ${saturation}%, 50%),
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hsl(${hue}, ${saturation}%, 100%))`,
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}}
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/>
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</label>
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</div>
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<div className="flex space-x-1">
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{colors.map((color, idx) => (
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<div
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key={idx}
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className="h-16 rounded flex-1 cursor-pointer transition-transform hover:scale-105"
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style={{ backgroundColor: color }}
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title={`Click to copy: ${color}`}
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onClick={() => copyToClipboard(color)}
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/>
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))}
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</div>
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<div className="text-sm font-mono text-zinc-950/70 dark:text-white/70">
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<p>
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Base color: hsl({hue}, {saturation}%, {lightness}%)
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</p>
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</div>
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</div>
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</div>
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)
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}
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```
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然后导入并使用它：
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```mdx
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import { ColorGenerator } from "/snippets/color-generator.jsx"
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<ColorGenerator />
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```
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<ColorGenerator />
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<div id="considerations">
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## 注意事项
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</div>
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- **SEO**：搜索引擎可能无法完全索引由客户端渲染的动态内容。
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- **首次加载**：访客在组件渲染之前可能会看到闪烁。
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- **可访问性**：确保屏幕阅读器能够播报动态内容的变化。
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- **优化依赖数组**：仅在 `useEffect` 中包含必要的依赖。
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- **缓存昂贵操作**：在适当之处使用 `useMemo` 或 `useCallback`。
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- **减少重新渲染**：将大型组件拆分为较小的组件。
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- **懒加载**：组件代码无法懒加载。所有组件都会随页面一起加载。如果某个组件在挂载时会执行资源密集型操作（例如获取数据或进行大量计算），请使用条件渲染，将其挂载推迟到用户交互时。
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