STUDIP.domReady(() => {
    if (STUDIP.editor_enabled) {
        // replace areas visible on page load
        replaceVisibleTextareas();

        // replace areas that are created or shown after page load
        // remove editors that become hidden after page load
        // show, hide and create do not raise an event, use interval timer
        setInterval(replaceVisibleTextareas, 300);
    }

    // when attaching to hidden textareas, or textareas who's parents are
    // hidden, the editor does not function properly; therefore attach to
    // visible textareas only
    function replaceVisibleTextareas() {
        const textareas = document.querySelectorAll('textarea.wysiwyg');
        textareas.forEach(STUDIP.wysiwyg.replace);
    }
});