MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
document.addEventListener("DOMContentLoaded", function() {
    const footnotes = document.querySelectorAll("sup.reference a");
    footnotes.forEach((footnote, index) => {
        // Replace the entire text with alphabetic labels
        const letter = String.fromCharCode(97 + index); // 'a' for 0, 'b' for 1, etc.
        footnote.textContent = `[${letter}]`;
    });
});