// ==UserScript==
// @name           FASTER Web - Remove Tab Index
// @namespace      https://github.com/cityssm/userscripts
// @match          https://*.fasterwebcloud.com/FASTER/*
// @grant          none
// @version        1.1.0
// @author         The Corporation of the City of Sault Ste. Marie
// @description    Removes overridden tab-key ordering, which makes it difficult to track the cursor when using the keyboard for navigation.
// @run-at         document-end
// @downloadURL    https://raw.githubusercontent.com/cityssm/userscripts/main/fasterWeb/tabIndexRemove.user.js
// @supportURL     https://github.com/cityssm/userscripts/issues
// @homepageURL    https://cityssm.github.io/userscripts/
// @icon           https://cityssm.github.io/img/header-cityssm.png
// ==/UserScript==
;
(() => {
    const focusableElementTagNames = new Set([
        'A',
        'BUTTON',
        'INPUT',
        'SELECT',
        'TEXTAREA'
    ]);
    function removeTabIndex() {
        const elements = document.querySelectorAll('[tabindex]:not([tabindex="0"]):not([tabindex="-1"])');
        for (const element of elements) {
            if (focusableElementTagNames.has(element.tagName)) {
                element.removeAttribute('tabindex');
            }
            else {
                element.setAttribute('tabindex', '0');
            }
        }
    }
    const observer = new MutationObserver(removeTabIndex);
    observer.observe(document, {
        attributes: true,
        childList: true,
        subtree: true
    });
    removeTabIndex();
})();