In JSF 2.2 there "delay" attribute of the f:ajax component should accept a value of "none".
The tag library documentation here:
states that the delay attributes can:
"...If this option is not specified, or if the value of delay is the literal string 'none' without the quotes, no delay is used. "
However, in MyFaces 2.2.7 this is not working. It results in the ajax action to not be called at all.
This same test works with Mojarra 2.2.10.
I will upload a simple test case to demonstrate this issue.
Also, a working scenario with a value of 400 is here:
And a working scenario with a value of zero ("0") is here:
In these tests, Enter "joh" in the field. You should see the results displayed below but they are not in the "none" test. Also, you do not see three calls in the logs to the backing bean.
I would expect that using either "none" or "0" as the value would give you the same behavior.