Using Submit component as a cancel button causes listener to be called twice in
Internet Explorer 6
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Key: TAPESTRY-840
URL: http://issues.apache.org/jira/browse/TAPESTRY-840
Project: Tapestry
Type: Sub-task
Components: Framework
Versions: 4.0
Environment: Tapestry 4.0 final
Internet Explorer 6
Reporter: Ben Dotte
The recommended way to build a cancel button on a form is to use the Submit
component with javascript like onclick="javascript:this.form.events.cancel();".
In Internet Explorer 6, this causes the cancel listener to get called twice and
occasionally the two calls crash into each other and cause an exception. This
problem does not exist with Firefox 1.5. Here is a simple example that
demonstrates the behavior:
<form jwcid="@Form" cancel="listener:cancel">
<submit jwcid="@Submit" value="Cancel"
onclick="javascript:this.form.events.cancel();"/>
</form>
public void cancel(IRequestCycle cycle)
{
System.out.println("cancel called");
}
Output after clicking the cancel button in IE 6:
cancel called
cancel called
(and sometimes an exception and stack trace)
The workaround is to use the Button component instead with the same javascript
call. "cancel called" is only printed once in that case for Firefox and
Internet Explorer and there are no exceptions.
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