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49e53ae | 1 2 3 4 5 6 7 8 | {
"version": 3,
"sources": ["../src/compose-refs.tsx"],
"sourcesContent": ["import * as React from 'react';\n\ntype PossibleRef<T> = React.Ref<T> | undefined;\n\n/**\n * Set a given ref to a given value\n * This utility takes care of different types of refs: callback refs and RefObject(s)\n */\nfunction setRef<T>(ref: PossibleRef<T>, value: T) {\n if (typeof ref === 'function') {\n return ref(value);\n } else if (ref !== null && ref !== undefined) {\n ref.current = value;\n }\n}\n\n/**\n * A utility to compose multiple refs together\n * Accepts callback refs and RefObject(s)\n */\nfunction composeRefs<T>(...refs: PossibleRef<T>[]): React.RefCallback<T> {\n return (node) => {\n let hasCleanup = false;\n const cleanups = refs.map((ref) => {\n const cleanup = setRef(ref, node);\n if (!hasCleanup && typeof cleanup == 'function') {\n hasCleanup = true;\n }\n return cleanup;\n });\n\n // React <19 will log an error to the console if a callback ref returns a\n // value. We don't use ref cleanups internally so this will only happen if a\n // user's ref callback returns a value, which we only expect if they are\n // using the cleanup functionality added in React 19.\n if (hasCleanup) {\n return () => {\n for (let i = 0; i < cleanups.length; i++) {\n const cleanup = cleanups[i];\n if (typeof cleanup == 'function') {\n cleanup();\n } else {\n setRef(refs[i], null);\n }\n }\n };\n }\n };\n}\n\n/**\n * A custom hook that composes multiple refs\n * Accepts callback refs and RefObject(s)\n */\nfunction useComposedRefs<T>(...refs: PossibleRef<T>[]): React.RefCallback<T> {\n // eslint-disable-next-line react-hooks/exhaustive-deps\n return React.useCallback(composeRefs(...refs), refs);\n}\n\nexport { composeRefs, useComposedRefs };\n"],
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}
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