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https://issues.apache.org/jira/browse/WICKET-6854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17250607#comment-17250607
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Stefan Franke commented on WICKET-6854:
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Please use a RequiredTextField instead of a TextField.
> OnChangeAjaxBehaviour is not called if the last character gets removed.
> -----------------------------------------------------------------------
>
> Key: WICKET-6854
> URL: https://issues.apache.org/jira/browse/WICKET-6854
> Project: Wicket
> Issue Type: Bug
> Reporter: Stefan Franke
> Assignee: Martin Tzvetanov Grigorov
> Priority: Major
>
> Consider this code where a TextField gets a OnChangeAjaxBehaviour
> {code:java}
> //
> TextField<String> tf = new TextField<>("id", model);
> tf.add(new OnChangeAjaxBehaviour() {
> public void onUpdate(AjaxRequestTarget target) {
> LOG.debug("update");
> }
> }
> form.add(tf){code}
> entering and modifying text into the TextField is working.
> deleting mostly works too, but not for the last character. It does'nt matter
> if you use [DEL] or [BS]
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