Alter element configuration form¶

Available since: 1.0.0

Provided tokens

Token	Description
`[form]`	The current form. Alias: `current_form`
`[form:id]`	The form ID.
`[form:base_id]`	The form base ID.
`[form:operation]`	The form operation.
`[form:mode]`	The form mode.
`[form:triggered]`	The form field name that triggered the form event.
`[form:values]`
`[form:values:FIELD_NAME]`	The field value for each of the named fields.
`[form:num_errors]`	The number of form errors.
`[event]`	The event.
`[event:webform]`	The webform.
`[event:webform:access_rules]`	The access rules.
`[event:webform:form]`	The form array.
`[event:webform:form_state]`	The form state object.
`[event]`	The event.
`[event:machine_name]`	The machine name of the ECA event.
`[session_user]`	The user account that dispatched the event, regardless if ECA is processing models under a different account. This is only available if ECA is configured to always run under a specific account.

Fires when the webform element configuration (edit) form is being built in the Webform UI builder. Use this to add custom configuration fields for properties defined via the element default properties alter event.