I am validating a field called client code for uniqueness...
I have used onkeyup JS event for this purpose. But its not working fine when i type the keys very fast. On this
onkeyup event
i am sending an ajax request to check whether the entered data already exists in the table or not.
Pls help if there is any alternative..
分享 Your question is quite vague in terms of the actual issue that you seem to be facing. But what I derive from it is that you are firing too many requests as you suggest rapid key presses!
As you would know, Ajax is like a normal page request, just done async, so it is bound by the same network latency, throughput and round trip constraints.
A clean way to achieve the functionality you need is to use a technique called throttling. One of the best js plugin for this purpose is located here: http://benalman.com/projects/jquery-throttle-debounce-plugin/
It basically allows you to rate-limit your requests to the server, thus not choking the resources and providing a smooth UI.
Also, unless you wish to trap certain special keys like <kbd>ESC</kbd>, I would suggest using keypress or keydown events. Can't remember the specific reasoning for it, but just a suggestion.
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