StarCitizenTools/mediawiki-extensions-TabberNeue
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perf: only use one resizeObserver for header overflow

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alistair3149 2024-06-07 14:19:43 -04:00
parent 7af1a75e2d
commit a414d2df70
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1 changed files with 24 additions and 10 deletions
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34
modules/ext.tabberNeue/ext.tabberNeue.js
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@ -10,6 +10,8 @@ const Hash = require( './Hash.js' );
const Transclude = require( './Transclude.js' );
const Util = require( './Util.js' );
let resizeObserver;
/**
* Class representing TabberAction functionality for handling tab events and animations.
*
@ -51,11 +53,10 @@ class TabberAction {
* Updates the header overflow based on the scroll position of the tab list.
* If the tab list is scrollable, it adds/removes classes to show/hide navigation buttons.
*
* @param {Element} tabberEl - The tabber element containing the header and tab list.
* @param {Element} tablist - The tablist element in the tabber
*/
static updateHeaderOverflow( tabberEl ) {
const header = tabberEl.querySelector( ':scope > .tabber__header' );
const tablist = header.querySelector( ':scope > .tabber__tabs' );
static updateHeaderOverflow( tablist ) {
const header = tablist.closest( '.tabber__header' );
const { roundScrollLeft } = Util;
const tablistWidth = tablist.offsetWidth;
const tablistScrollWidth = tablist.scrollWidth;
@ -243,6 +244,18 @@ class TabberAction {
const scrollOffset = type === 'prev' ? -tablistWidth / 2 : tablistWidth / 2;
TabberAction.scrollTablist( scrollOffset, tablist );
}
/**
* Handles the resize event for the header element.
* Updates the header overflow based on the scroll position of the tab list.
*
* @param {ResizeObserverEntry[]} entries - An array of ResizeObserverEntry objects.
*/
static handleHeaderResize( entries ) {
for ( const { target } of entries ) {
TabberAction.updateHeaderOverflow( target );
}
}
}
/**
@ -261,7 +274,7 @@ class TabberEvent {
this.activeTab = this.tablist.querySelector( '[aria-selected="true"]' );
this.indicator = this.tabber.querySelector( ':scope > .tabber__header > .tabber__indicator' );
this.tabFocus = 0;
this.debouncedUpdateHeaderOverflow = mw.util.debounce( () => TabberAction.updateHeaderOverflow( this.tabber ), 100 );
this.debouncedUpdateHeaderOverflow = mw.util.debounce( () => TabberAction.updateHeaderOverflow( this.tablist ), 100 );
this.debouncedSetActiveTabpanel = mw.util.debounce( () => TabberAction.setActiveTabpanel( this.getActiveTabpanel() ), 100 );
this.handleTabFocusChange = this.handleTabFocusChange.bind( this );
this.onHeaderClick = this.onHeaderClick.bind( this );
@ -269,8 +282,6 @@ class TabberEvent {
this.onTablistKeydown = this.onTablistKeydown.bind( this );
// eslint-disable-next-line compat/compat
this.activeTabpanelObserver = new ResizeObserver( this.debounceSetActiveTabpanel() );
// eslint-disable-next-line compat/compat
this.headerOverflowObserver = new ResizeObserver( this.debounceUpdateHeaderOverflow() );
}
/**
@ -402,7 +413,7 @@ class TabberEvent {
this.tablist.addEventListener( 'scroll', this.onTablistScroll );
this.tablist.addEventListener( 'keydown', this.onTablistKeydown );
this.activeTabpanelObserver.observe( this.getActiveTabpanel() );
this.headerOverflowObserver.observe( this.tablist );
resizeObserver.observe( this.tablist );
}
/**
@ -413,7 +424,7 @@ class TabberEvent {
this.tablist.removeEventListener( 'scroll', this.onTablistScroll );
this.tablist.removeEventListener( 'keydown', this.onTablistKeydown );
this.activeTabpanelObserver.unobserve( this.getActiveTabpanel() );
this.headerOverflowObserver.unobserve( this.tablist );
resizeObserver.unobserve( this.tablist );
}
/**
@ -599,7 +610,7 @@ class TabberBuilder {
this.createIndicator();
const firstTab = this.tablist.querySelector( '.tabber__tab' );
TabberAction.setActiveTab( firstTab );
TabberAction.updateHeaderOverflow( this.tabber );
TabberAction.updateHeaderOverflow( this.tablist );
setTimeout( () => {
const tabberEvent = new TabberEvent( this.tabber, this.tablist );
tabberEvent.init();
@ -638,6 +649,9 @@ function load( tabberEls ) {
} );
}
// eslint-disable-next-line compat/compat
resizeObserver = new ResizeObserver( mw.util.debounce( TabberAction.handleHeaderResize, 100 ) );
// Delay animation execution so it doesn't not animate the tab gets into position on load
setTimeout( () => {
TabberAction.toggleAnimation( true );