- Based on MVVM small talk 1 http://books.zkoss.org/wiki/Small_Talks/2011/November/MVVM_in_ZK_6_-_Design_your_first_MVVM_page example: search2.zul
- Bind command 'doSearch' at onChange event.
- type A, blur focus, then type B, and blur focus. You will find it displays the result when filter is 'A'. It always result of last filter value.
- combobox with command binding at onChange only will also have this issue.