Claude Code Guide（zebbern）

Hoist Static JSX Elements

Extract static JSX outside components to avoid re-creation.

Incorrect (recreates element every render):

function LoadingSkeleton() {
  return <div className="h-20 animate-pulse bg-gray-200" />
}

function Container() {
  return <div>{loading && <LoadingSkeleton />}</div>
}

Correct (reuses same element):

const loadingSkeleton = <div className="h-20 animate-pulse bg-gray-200" />

function Container() {
  return <div>{loading && loadingSkeleton}</div>
}

This is especially helpful for large and static SVG nodes, which can be expensive to recreate on every render.

Note: If your project has React Compiler enabled, the compiler automatically hoists static JSX elements and optimizes component re-renders, making manual hoisting unnecessary.