Which keycode charcode

NET 0. The problem is twofold. First, different browsers fire the keypress event for some keystrokes, but not all. Jeez Louise. My script was suppressing the arrow keys in only that browser. Certainly, a user should be able to arrow back and forth within the field they are editing. This quirksmode article turned out to be a lifesaver. He exhaustively catalogs the differences across browsers, and provides a very valuable little test app scroll to the bottom of that page.

What code contains control characters? Do I need to convert? Do I need to convert? The answers to all your questions can be found on the following page. This means to get the character code corresponding to the keypress, the following will work everywhere, assuming a keypress event object is stored in a variable called e :.

This will generally return you a character code where one exists and 0 otherwise. There are a few cases where you'll get a non-zero value when you shouldn't:. The workaround for the first problem is a little involved and requires using the keydown event as well. Good grief. You'd probably find that turning on the cap-lock and then typing your letter would give you the code you expect.

It'd recommend using onKeyUp because it's the closest to onKeyPress. The following logic can be used to trap for keyboard input in this case, via a jQuery document ready wrapper. It may read a little goofy, but basically, I check for everything I want to allow for in your case, the letters A through Z case insensitive and do nothing. In other words, the default action is allowed, but any input other than alpha is prevented.

Standard keyboard navigation, such as arrow keys, Home, End, Tab, Backspace, Delete and so forth are checked for and allowed. NOTE: This code was originally written to satisfy user input permitting only alphanumeric values A - Z, a - z, 0 - 9 , and I left those lines intact as comments. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 10 years, 11 months ago. Active 5 years, 9 months ago. Viewed 59k times. For business requirements this needs to be done on KeyPress so that the character simply isnt allowed to even appear in the input. Tab, enter, arrows, backspace, shift are all allowed. The user must be able to freely move in and out of the textbox, delete characters etc etc. This is the starting point of my code Improve this question.

It returns the numeric unicode value for the character. It differs from keyCode in that it will have different values for A and a, for example ie. Linda Nasredin Linda Nasredin 1 1 1 bronze badge. The which property will be undefined if you are not using jQuery.

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