[WICKET-6853] OnChangeAjaxBehaviour gets called if there was no change

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 8.10.0
• Component/s: wicket-core
• Assignee: Sven Meier
• Reporter: Stefan Franke
• Created: 16/Nov/20 10:38
• Updated: 15/Dec/20 13:03
• Resolved: 20/Nov/20 22:39

Description

Consider this code where a TextField gets a OnChangeAjaxBehaviour 

// 
TextField<String> tf = new TextField<>("id", model);
tf.add(new OnChangeAjaxBehaviour() {
  public void onUpdate(AjaxRequestTarget target) {
    LOG.debug("update");
  }
}
form.add(tf)

The onUpdate() method is also called on focus out. But focus out does no updates.