Card full title.user.js

// ==UserScript==
// @name         Card full title
// @namespace    https://dobby233liu.neocities.org
// @version      v1.0.2
// @description  Present full card title on hover
// @author       Liu Wenyuan
// @match        https://t.bilibili.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=bilibili.com
// @grant        none
// ==/UserScript==

(function() {
    "use strict";

    const CARD_TITLE_QUERY = [
        ".bili-dyn-card-article__title", ".bili-dyn-card-common__title", ".bili-dyn-card-courses__title",
        ".bili-dyn-card-live__title", ".bili-dyn-card-medialist__title", ".bili-dyn-card-music__title",
        ".bili-dyn-card-pgc__title", ".bili-dyn-card-subscription__title", ".bili-dyn-card-video__title",
        ".bili-dyn-card-ugc__detail__title", ".bili-dyn-card-reserve__title", ".bili-dyn-card-match__subTitle",
        ".bili-dyn-card-match__title", ".dyn-card-opus__title",
        ".bili-dyn-search-trendings .trending-list .trending .text"
    ].join(",");

    document.addEventListener("mouseover", function(ev) {
        if (!(ev.target && ev.target.matches(CARD_TITLE_QUERY))) {
            return;
        }

        if (!ev.target.title) {
            ev.target.title = ev.target.innerText;
        }
    });
})();