Alright, a short and useful code snippet for textfield. You can use this code to disable certain keys to be entered into a textfield or textarea by detecting its keycode.
JS - jQuery
This is how you do it, once the keycode of the spacebar is detected, it returns false which disallow the entering of space. If you want to disable some other keys, you can refer to this keycode table:
http://www.foreui.com/articles/Key_Code_Table.htm
Alternatively, you can use alert to display the keycode of the key you've pressed.
$('input.nospace').keydown(function(e) {
// alert (e.keyCode);
if (e.keyCode == 32) {
return false;
}
});
HTML/XHTML
All you have to do is add a class called "nospace" to the textfield you want to apply with this restriction.
<input type="text" class="nospace" name="mobileno" />
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$(window).on('keydown',function(e){
if ($(e.target).hasClass('nospace') && e.keyCode == 32) {
return false;
}
});