On_sent_ok not perfectly working

Hi,

First of all your plugin is very useful, it helps me a lot.
Very good job.

So my problem is when i specified an “on_sent_ok” url, the form’s content is displayed for 1/2 seconds after submit (with green box saying “it works, mail sent…” THEN redirection comes…

I dont want the form to appear at all after submit. Is it possible ? And how to ?

In additional settings i have this, do i need to add “,” between each ? :
acceptance_as_validation: on
on_sent_ok: “location = ‘https://mywebsite.fr’;”

Thanks a lot.

https://www.ads-software.com/plugins/contact-form-7/