MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

function checkAndExecute(selector, callback) {
    const elements = document.querySelectorAll(selector);
    elements.forEach((element) => {
        callback(element);
    });
}

checkAndExecute(".rgwiki-gadvia-score-calculator", (element) => {
    element.textContent = "JavaScript works!"
});