'Move to Inbox' in Basic HTML View in Gmail

move_to_inbox.js

// ==UserScript==
// @name         'Move to Inbox' in Basic HTML View in Gmail
// @namespace    https://quint.guvernator.net
// @version      0.1
// @description  add an option to move emails to the inbox in the basic HTML view of Gmail
// @author       qguv
// @match        https://mail.google.com/mail/u/*/h/*/?*&s=*
// @exclude      https://mail.google.com/mail/u/*/h/*/?*&s=i*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
 
    const exclusions = [
        'input[type="submit"][name="nvp_a_ib"]',
        'option[value="ib"]',
    ];

    if (exclusions.some(document.querySelector)) {
      return;
    }

    const move_to_inbox = document.createElement('option');
    move_to_inbox.value = 'ib';
    move_to_inbox.innerHTML = '→ Inbox';
    
    const more_actions = document.querySelector('select[name="tact"]');
    more_actions.children[0].after(move_to_inbox);
})();