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- "use strict";
- Object.defineProperty(exports, "__esModule", { value: true });
- exports.useMergeRefs = void 0;
- var tslib_1 = require("tslib");
- var React = tslib_1.__importStar(require("react"));
- var assignRef_1 = require("./assignRef");
- var useRef_1 = require("./useRef");
- var currentValues = new WeakMap();
- /**
- * Merges two or more refs together providing a single interface to set their value
- * @param {RefObject|Ref} refs
- * @returns {MutableRefObject} - a new ref, which translates all changes to {refs}
- *
- * @see {@link mergeRefs} a version without buit-in memoization
- * @see https://github.com/theKashey/use-callback-ref#usemergerefs
- * @example
- * const Component = React.forwardRef((props, ref) => {
- * const ownRef = useRef();
- * const domRef = useMergeRefs([ref, ownRef]); // 👈 merge together
- * return <div ref={domRef}>...</div>
- * }
- */
- function useMergeRefs(refs, defaultValue) {
- var callbackRef = (0, useRef_1.useCallbackRef)(defaultValue || null, function (newValue) {
- return refs.forEach(function (ref) { return (0, assignRef_1.assignRef)(ref, newValue); });
- });
- // handle refs changes - added or removed
- React.useLayoutEffect(function () {
- var oldValue = currentValues.get(callbackRef);
- if (oldValue) {
- var prevRefs_1 = new Set(oldValue);
- var nextRefs_1 = new Set(refs);
- var current_1 = callbackRef.current;
- prevRefs_1.forEach(function (ref) {
- if (!nextRefs_1.has(ref)) {
- (0, assignRef_1.assignRef)(ref, null);
- }
- });
- nextRefs_1.forEach(function (ref) {
- if (!prevRefs_1.has(ref)) {
- (0, assignRef_1.assignRef)(ref, current_1);
- }
- });
- }
- currentValues.set(callbackRef, refs);
- }, [refs]);
- return callbackRef;
- }
- exports.useMergeRefs = useMergeRefs;
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