up.form
up:form:validate
DOM event
Event properties
Validation
The form parameters that will be sent as the form's request payload.
Listeners may inspect and modify params before they are sent. Note that the request may be a batch of multiple validations.
The form fields that triggered this validation pass.
When multiple fields are validating within the same task, Unpoly will make a single validation request with multiple targets.
The names of the validating fields are also sent
as an X-Up-Validate request header.
Render pass
An object with render options for the fragment update that will show the validation results.
Listeners may inspect and modify these options.
Note that the request may be a batch of multiple validations.
In that case event.renderOptions will contain the merged render options
for every targeted fragment. Unpoly will try to merge render options where possible (e.g. { headers, target }).
When a render option cannot be merged (e.g. { scroll }),
the option from the last validation in the batch will be used.
Prevents the validation request from being sent to the server.