How to change lowercase chars to uppercase using the 'keyup' event?

Question

My goal is to use the jQuery event .keyup() to convert inputted lowercase chars to uppercase.

How can I achieve this?

Answer 1

Plain ol' javascript:

var input = document.getElementById('inputID');

input.onkeyup = function(){
    this.value = this.value.toUpperCase();
}

Javascript with jQuery:

$('#inputID').keyup(function(){
    this.value = this.value.toUpperCase();
});