39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
import { arraysEqual } from './array';
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/**
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* Set up a ref resolver function given internal state managed for the ref.
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* @param local Set
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*/
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var createResolver = function (local) {
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return function (newValue) {
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for (var _i = 0, _a = local.refs; _i < _a.length; _i++) {
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var ref = _a[_i];
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if (typeof ref === 'function') {
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ref(newValue);
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}
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else if (ref) {
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// work around the immutability of the React.Ref type
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ref.current = newValue;
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}
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}
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};
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};
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/**
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* Helper to merge refs from within class components.
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*/
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export var createMergedRef = function (value) {
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var local = {
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refs: [],
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};
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return function () {
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var newRefs = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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newRefs[_i] = arguments[_i];
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}
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if (!local.resolver || !arraysEqual(local.refs, newRefs)) {
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local.resolver = createResolver(local);
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}
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local.refs = newRefs;
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return local.resolver;
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};
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};
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//# sourceMappingURL=createMergedRef.js.map
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