jquery text change when input change

Question

How can we do like the bottom, the simple way ?

?

it updates when we change the input.

Answer 1

Say you had the following HTML:

<input type="text" id="textbox"/>

<span>http://twitter.com/<span id="changeable_text"></span></span>

Your JS would listen for the keyup event.

$('input#textbox').keyup(function() {
   //perform ajax call...
   $('#changeable_text').text($(this).val());
});