Size of the multiline TextBox [closed]

answered 2020-06-02 17:27:50 +0800

cor3000
6280 ● 2 ● 7

yes it is, at least in modern browsers (non IE) there's a dedicated web API (ResizeObserver) to observe changes of resizable elements such as textareas.

In ZK it can be initialized/cleaned up using the client side API (during onBind/onUnbind), and custom events can be fired to the server side (widget.fire())

https://www.zkoss.org/javadoc/latest/jsdoc/zk/Widget.html#fire-global.String-zk.Object-global.Map-int-

The example below shows this in a simple case. To reduce the number of events fired it uses the duplicatIgnore option.

https://zkfiddle.org/sample/1qms0np/1-observe-textbox-resize