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@blueprintjs/core

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/* * Copyright 2020 Palantir Technologies, Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ export function isRefObject(value) { return value != null && typeof value.current !== "undefined"; } export function isRefCallback(value) { return typeof value === "function"; } export function combineRefs(ref1, ref2) { return mergeRefs(ref1, ref2); } export function mergeRefs() { var refs = []; for (var _i = 0; _i < arguments.length; _i++) { refs[_i] = arguments[_i]; } return function (value) { refs.forEach(function (ref) { if (isRefCallback(ref)) { ref(value); } else if (isRefObject(ref)) { ref.current = value; } }); }; } export function getRef(ref) { var _a; if (ref === null) { return null; } return (_a = ref.current) !== null && _a !== void 0 ? _a : ref; } /** * Assign the given ref to a target, either a React ref object or a callback which takes the ref as its first argument. */ export function setRef(refTarget, ref) { if (refTarget === undefined) { return; } if (isRefObject(refTarget)) { refTarget.current = ref; } else if (isRefCallback(refTarget)) { refTarget(ref); } } export function refHandler(refTargetParent, refTargetKey, refProp) { if (isRefObject(refProp)) { refTargetParent[refTargetKey] = refProp; return refProp; } return function (ref) { refTargetParent[refTargetKey] = ref; if (isRefCallback(refProp)) { refProp(ref); } }; } //# sourceMappingURL=refs.js.map