Remove ImportantFilled Icons in Outlook

remove_important.js

// ==UserScript==
// @name         Remove ImportantFilled Icons in Outlook
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Removes all <i> elements with data-icon-name="ImportantFilled" from the DOM in Outlook
// @match        https://outlook.office.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function removeImportantIcons() {
        const icons = document.querySelectorAll('i[data-icon-name="ImportantFilled"]');
        icons.forEach(icon => icon.remove());
    }

    // Run the function when the page loads
    removeImportantIcons();

    // Create a MutationObserver to handle dynamically added elements
    const observer = new MutationObserver(function(mutations) {
        mutations.forEach(function(mutation) {
            if (mutation.addedNodes && mutation.addedNodes.length > 0) {
                removeImportantIcons();
            }
        });
    });

    // Start observing the document with the configured parameters
    observer.observe(document.body, { childList: true, subtree: true });
})();