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55 lines
1.8 KiB
TypeScript
55 lines
1.8 KiB
TypeScript
/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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let scrollTopDashboardInterval: any;
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const SCROLL_STEP = 120;
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const INTERVAL_DELAY = 50;
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export default function handleScroll(scroll: string) {
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const setupScroll =
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scroll === 'SCROLL_TOP' &&
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!scrollTopDashboardInterval &&
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document.documentElement.scrollTop !== 0;
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const clearScroll =
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scrollTopDashboardInterval &&
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(scroll !== 'SCROLL_TOP' || document.documentElement.scrollTop === 0);
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if (setupScroll) {
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scrollTopDashboardInterval = setInterval(() => {
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if (document.documentElement.scrollTop === 0) {
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clearInterval(scrollTopDashboardInterval);
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scrollTopDashboardInterval = null;
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return;
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}
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let scrollTop = document.documentElement.scrollTop - SCROLL_STEP;
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if (scrollTop < 0) {
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scrollTop = 0;
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}
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window.scroll({
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top: scrollTop,
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behavior: 'smooth',
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});
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}, INTERVAL_DELAY);
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} else if (clearScroll) {
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clearInterval(scrollTopDashboardInterval);
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scrollTopDashboardInterval = null;
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}
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}
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