@blueprintjs/core
Version:
Core styles & components
24 lines • 1.02 kB
JavaScript
/*
* Copyright 2022 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.
*/
import * as React from "react";
export function usePrevious(value) {
var ref = React.useRef();
React.useEffect(function () {
ref.current = value; // assign the value of ref to the argument
}, [value]); // this code will run when the value of 'value' changes
return ref.current; // in the end, return the current ref value.
}
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