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optimization

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This commit is contained in:
Peter Savchenko 2022-07-21 01:00:46 +03:00
parent 7b737209df
commit 8bc5ae06ed
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1 changed files with 12 additions and 0 deletions
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12
src/frontend/js/classes/table-of-content.js
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@ -288,6 +288,18 @@ export default class TableOfContent {
* @returns {void} * @returns {void}
*/ */
scrollToActiveItemIfNeeded() { scrollToActiveItemIfNeeded() {
/**
* Do nothing if the Table of Content has no internal scroll at this page
*
* @todo compute it once
*/
const hasScroll = this.nodes.wrapper.scrollHeight > this.nodes.wrapper.clientHeight;
if (!hasScroll) {
return;
}
/** /**
* If some item is highlighted, check whether we need to scroll to it or not * If some item is highlighted, check whether we need to scroll to it or not
*/ */