User:BrokenSegue/shorten.js

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// <nowiki>
// to use add importScript( 'User:BrokenSegue/shorten.js' ); to your common.js

const MAX_HEIGHT = 500;
(function(mw, $, wb) {
    "use strict";

    if (mw.config.get('wgNamespaceNumber') !== 0 || !mw.config.exists('wbEntityId')) {
        return;
    }
	let statementBlocks = $(".wikibase-statementlistview");
	let tallBlocks = statementBlocks.filter(function(){return this.getBoundingClientRect().height > MAX_HEIGHT});
	tallBlocks.css("max-height", MAX_HEIGHT).css("overflow-y", "auto");
}(mediaWiki, jQuery, wikibase));
// </nowiki>