Simultaneous targets (js events) for metrics and google analytics?

Question

JavaScript

Greetings, dear ones!
How are js events of a click on a button (goal) set up simultaneously for YaMetrika and Google Analytics?
For example, now the button has the following code:

<button id="mail_submit" onclick="yaCounter99999999.reachGoal('mail_submit'); return true;">Submit</button>

If you add another onclick attribute to the same tag, that won't work, and that's wrong, right?
How are button click events configured simultaneously for both metrics, both google and Yandex?
It turns out in separate scripts? Can I have an example?
Something like this?

document.getElementById("mail_submit").addEventListener("click", function(){
    yaCounter99999999.reachGoal('mail_submit');
    ga("send", "event", "mail_submit", "click");
    //если инлайн код для гугла onclick="ga (‘send', ‘event', ‘mail_submit', ‘click'); return true;"
});

Thank you!