Radiobutton selection script and button click?

Question

JavaScript

I'm trying to write a Greasemonkey script that should set true for a specific radiobutton and then click on a specific button (although it's the only one on the page). After a successful operation, another page opens, after which you need to return to the previous one and repeat everything again (select the desired "radio" and click on the button) - i.e. arrange a cycle.

I have not yet reached the return to the previous page and the cycle, because corny I can not select "radio" and click on the button.

<input type="radio" name="thisradio" value="123">
<input type="submit" onclick="send(); return false;" value="Запустить">

My attempts:

// ==UserScript==
// @name     Скрипт БезИмени 648414
// @version  1
// @grant       GM_openInTab
// @grant       unsafeWindow
// @run-at      document-start
// ==/UserScript==

document.querySelector('[name="thisradio"][value="123"]').checked = true;
document.querySelector('[value="Запустить"]').dispatchEvent(new MouseEvent('click'));

In the console, this code seems to work, but the script itself does not want to work. Tell me, please, what could be wrong?

Thank you!

Answer 1

Pass an element whose checked property will be changed:

waitForKeyElements ("input[name='thisradio'][value='123']", selectRadioButton(/* сюда передайте */), true);