aws-northstar
Version:
NorthStar Design System
57 lines (53 loc) • 2.1 kB
JavaScript
/** *******************************************************************************************************************
Copyright Amazon.com, Inc. or its affiliates. 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 { useRef } from 'react';
const isBrowser = typeof window !== 'undefined';
const getScrollPosition = ({ element }) => {
if (!isBrowser) {
return {
x: 0,
y: 0,
};
}
const target = (element === null || element === void 0 ? void 0 : element.current) || document.body;
return {
x: target.scrollLeft || 0,
y: target.scrollTop || 0,
};
};
const useScrollPosition = (effect, element, wait) => {
const position = useRef(getScrollPosition({}));
let throttleTimeout = null;
const callBack = () => {
const currPos = getScrollPosition({ element });
if (currPos.x !== position.current.x || currPos.y !== position.current.y) {
effect(currPos);
position.current = currPos;
}
throttleTimeout = null;
};
const handleScroll = () => {
if (wait) {
if (throttleTimeout === null) {
throttleTimeout = setTimeout(callBack, wait);
}
}
else {
callBack();
}
};
return {
handleScroll,
};
};
export default useScrollPosition;