javascript - jQuery method that disallows input of certain chars -

i'm trying make jquery method delete wanted chars selected elements.

for example:

$("input").disallowchars(/\d/g);// should disallow input of non-digit elements in input elements 

this how thought it, doesn't seem work:

$.fn.disallowchars = function(regexp){   this.keyup(function(){      var value = $(this).val();     value.replace(regexp, "");     $(this).val(value);    });   return this; };  $("input").disallowchars(/\d/g); 

i'm total newbie @ this, how can make work.

thanks

you use string.fromcharcode() , keypress event instead:

$.fn.disallowchars = function(regexp){   return this.keypress(function(e){       if(string.fromcharcode(e.which).match(regexp)) return false;   }); }; 

demo

but doesn't disable characters paste in input using mouse or paste keyboard shortcut.

on modern browsers, use input event, or change keyup paste mouseup (ya mouseup, handle dropped text too):

$.fn.disallowchars = function(regexp){   return this.on('input', function(){       this.value = this.value.replace(regexp, '');             }); }; 

but once input value replaced, text carret put in end (or start depending browser behaviour) of string input.

demo