MediaWiki:Common.js

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

/* Finds elements by a selector and executes a function for each element */
function findAndExecute(selector, callback) {
    const elements = document.querySelectorAll(selector);
    elements.forEach((element) => {
        try {
            callback(element);
        } catch (e) {
            console.error(`Error while initializing "${selector}"`, e);
        }
    });
}

/* tabindex="-1" is not allowed by MediaWiki, this is a workaround */
findAndExecute(".rgwiki-main-negative-tabindex", (element) => {
    element.tabIndex = -1;
});

/* Localized date */
findAndExecute(".rgwiki-main-date-localized", (span) => {
    const inputDateString = span.dataset.datetime !== undefined ? span.dataset.datetime : span.textContent;
    const date = new Date(inputDateString);
    const outputDateString = date.toString();
    span.title = `This date in your timezone: ${outputDateString}`;
});