This feature is experimental. It may be changed or removed in a future version without prior notice or deprecation.
Adds params from the given HTML form field.
The added params will include exactly those form values that would be
included for the given field in a regular form submission. If the given field wouldn't
submit a value (like an unchecked
<input type="checkbox">, nothing will be added.
up.Params.fromForm() for more details and examples.