Kommt drauf an welches Element du da verwendest!
Is it a custom-element? Or is it a Wix-Form.
Grab the ID of this element, or the id of one of the input-elements and generate your code, to prefil the inputs with your wished data you want.
$w.onReady(()=>{
$w('#input1').value = "+49";
});
If you are using a DATASET, it already gets a little bit more difficult.
But still duable… (in this case an example with a DYNAMIC-DATASET → connected to a dynamic page).
$w.onReady(()=>{
$w('#dynamicDataset').onReady(()=>{
let curItem = $w('#dynamicDataset').getCurrentItem();
let title = curItem.title
let ID = curItem._id
console.log(title);
console.log(ID);
});
$w('#input1').value = "+49";
});
But if you are using already predefined stuff like wix-forms, you will have to go another way.