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47 lines
1.0 KiB
Markdown
47 lines
1.0 KiB
Markdown
---
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title: Hoist Static JSX Elements
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impact: LOW
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impactDescription: avoids re-creation
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tags: rendering, jsx, static, optimization
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---
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## Hoist Static JSX Elements
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Extract static JSX outside components to avoid re-creation.
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**Incorrect (recreates element every render):**
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```tsx
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function LoadingSkeleton() {
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return <div className="animate-pulse h-20 bg-gray-200" />
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}
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function Container() {
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return (
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<div>
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{loading && <LoadingSkeleton />}
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</div>
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)
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}
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```
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**Correct (reuses same element):**
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```tsx
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const loadingSkeleton = (
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<div className="animate-pulse h-20 bg-gray-200" />
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)
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function Container() {
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return (
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<div>
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{loading && loadingSkeleton}
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</div>
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)
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}
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```
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This is especially helpful for large and static SVG nodes, which can be expensive to recreate on every render.
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**Note:** If your project has [React Compiler](https://react.dev/learn/react-compiler) enabled, the compiler automatically hoists static JSX elements and optimizes component re-renders, making manual hoisting unnecessary.
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