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Nexus / Wordpress images picker previews dark background

// ==UserScript==
// @name         Wordpress images picker previews dark background
// @namespace    http://tampermonkey.net/
// @version      2025-06-03
// @description  Adds dark background to Wordpress images picker previews
// @author       Nexus <artem.nexus94@gmail.com>
// @include      /^https?:\/\/.+\.[^\/]+\/wp-admin\/post.php.*$/
// @grant        none
// @updateURL    https://openuserjs.org/meta/Nexus/Wordpress_images_picker_previews_dark_background.meta.js
// @downloadURL  https://openuserjs.org/install/Nexus/Wordpress_images_picker_previews_dark_background.user.js
// @copyright    2025, Nexus (https://openuserjs.org/users/Nexus)
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    var head = document.getElementsByTagName('head');
    if (!head.length) {
        return;
    }

    head = head[0];

    var runtimeStyle = document.createElement('style');
    runtimeStyle.id = 'WordpressImagesViewerDarkBackground--runtime-styles';

    runtimeStyle.textContent = '.wp-core-ui .attachment-preview:before {background: #000}';

    head.appendChild(runtimeStyle);
})();