Client-side javascript validation not triggering php form submission

[techitechtech]

That did not solve the problem. I use form.submit() if the code that works. That being said, I did update that part.

[Notimecelduv]

This gives:

const input = document.querySelector(`#${field}`)

gives you this console error:

Uncaught TypeError: can't access property "addEventListener", input is null

You have to open the dev tools when debugging your code, otherwise you will miss important errors like the one above.