mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/RelatedArticles
synced 2024-12-19 11:30:44 +00:00
dc2e65a084
Previously RelatedArticles required the Cards extension This code refers to that old state and is cleaned up. ext.relatedArticles.cards is added a dependency of ext.relatedArticles.readMore since it now belongs to the same extension Change-Id: I4a89ed4256a4ae9fd22b0191748bd47ac3ffc593
78 lines
2.2 KiB
JavaScript
78 lines
2.2 KiB
JavaScript
/* eslint-disable no-jquery/no-global-selector */
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( function () {
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var data = require( './data.json' ),
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relatedPages = new mw.relatedPages.RelatedPagesGateway(
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new mw.Api(),
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mw.config.get( 'wgPageName' ),
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mw.config.get( 'wgRelatedArticles' ),
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data.useCirrusSearch,
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data.onlyUseCirrusSearch,
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data.descriptionSource
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),
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// Make sure this is never undefined as I'm paranoid
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LIMIT = mw.config.get( 'wgRelatedArticlesCardLimit', 3 );
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/**
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* Load related articles when the user scrolls past half of the window height.
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*
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* @ignore
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*/
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function loadRelatedArticles() {
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var readMore = document.querySelector( '.read-more-container' ),
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isSupported = 'IntersectionObserver' in window;
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if ( !readMore || !isSupported ) {
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// The container is not in the HTML for some reason and cannot be queried.
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// See T281547
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return;
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}
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/**
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* @param {Element} container
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*/
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function initRelatedArticlesModule( container ) {
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$.when(
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mw.loader.using( 'ext.relatedArticles.readMore' ),
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relatedPages.getForCurrentPage( LIMIT )
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).then( function ( _, pages ) {
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if ( pages.length ) {
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mw.track( 'ext.relatedArticles.init', pages );
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} else if ( container.parentNode ) {
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container.parentNode.removeChild( container );
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}
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} );
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}
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var doc = document.documentElement;
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// IntersectionObserver will not work if the component is already visible on the page.
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// To handle this case, we compare scroll height to viewport height.
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if ( ( doc.scrollHeight / 2 ) < doc.clientHeight ) {
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// Load straight away. We are on a stub page.
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initRelatedArticlesModule( readMore );
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return;
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}
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// eslint-disable-next-line compat/compat
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var observer = /** @type {IntersectionObserver} */( new IntersectionObserver( function ( entries ) {
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if ( !entries[ 0 ].isIntersecting ) {
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return;
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}
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// @ts-ignore
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observer.unobserve( readMore );
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observer.disconnect();
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// @ts-ignore
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initRelatedArticlesModule( readMore );
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}, {
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rootMargin: '-100% 0% 0% 0%'
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} ) );
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observer.observe( readMore );
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}
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function showReadMore() {
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// try an initial load, in case of no scroll
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loadRelatedArticles();
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}
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$( showReadMore );
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}() );
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