Font Override のソースコード

Font Override

Force font for websites
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// ==UserScript==
// @name         Font Override
// @version      1.5
// @description  Force font for websites
// @match        *://*/*
// @run-at       document-start
// @icon         https://www.google.com/s2/favicons?sz=64&domain=fifa.com
// @grant        none
// @namespace https://greasyfork.org/users/1538784
// ==/UserScript==

(function () {
    'use strict';

    const STYLE_ID = 'font-override-style';
    const FONT_STACK = '"Bahnschrift", "Segoe UI Variable Text", "Segoe UI", sans-serif';

    const styleText = `
        :root {
            --font-override-family: ${FONT_STACK};
        }

        :where(
            html, body, a, abbr, address, article, aside, b, blockquote, button, caption,
            cite, dd, details, dialog, div, dl, dt, em, figcaption, footer, h1, h2, h3,
            h4, h5, h6, header, input, label, legend, li, main, nav, ol, option, p,
            section, select, small, span, strong, summary, table, td, textarea, th,
            time, ul
        ):not(
            i,
            code,
            pre,
            kbd,
            samp,
            svg,
            canvas,
            [class*="material"],
            [class*="fa-"],
            [class*="icon"],
            [class*="glyph"],
            [class*="symbol"],
            [aria-hidden="true"],
            [role="img"]
        ) {
            font-family: var(--font-override-family) !important;
        }

        code,
        pre,
        kbd,
        samp {
            font-family: ui-monospace, Consolas, "Courier New", monospace !important;
        }
    `;

    function injectStyle(doc) {
        if (!doc || doc.getElementById(STYLE_ID)) return;

        const style = doc.createElement('style');
        style.id = STYLE_ID;
        style.textContent = styleText;
        (doc.head || doc.documentElement).appendChild(style);
    }

    injectStyle(document);
})();