This is my first time posting to the form, as I am a novice at wix code.
I was able to create a form to add url parameters to form fields as well as hidden form fields (s1 and s2) via https://email@example.com&phone=9491231234&s1=123&s2=321
However, what I want is when the user submits the form, I need the parameters s1 & s2 to fire off into an iframe on a thank you page (see url example above and submit) which will contain the parameters s1 and s2 and load into the third party providers database. Which, I'm pretty sure the best option to do is an iframe as it will load when the page loads.
I need to edit the url in the iframe when a user hits submit and is redirected to a thank you page so our third party can get the s1 and s2 data, for example:
<iframe src="https://example.com/example?s1=123&s2=321" height=1 width=1 style="display:none;"></iframe>
I have already taken a look at https://support.wix.com/en/article/corvid-working-with-the-html-element, however, I am very new to this and would like to see example code as that article did not help me.