MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
/**
 * Force Vector-2022 dark theme site-wide
 */
( function () {
    // Add the class 'vector-theme-dark' to the root <html> element
    // This triggers Vector-2022's built-in dark mode CSS rules.
    document.documentElement.classList.add( 'vector-theme-dark' );
} () );