I have a pretty basic set of things I want to do:
Capture key press, compare against an allowed list, block keys that
are not in that list, replace a space by a dash if entered.
As this is happening, I have a span I wanted to be updated with the
live values. The username field at https://twitter.com/signup is
exactly what I am trying to do, though I have trouble dissecting how
they did it.
Here is my attempt, which is off by one keypress for some reason. Any
help is appreciated. Using 1.3.2 JQ.
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
$('input#the-name').bind('keypress', function(e) {
console.log('keycode: ' + e.which + ' actual: [' +
String.fromCharCode(e.which) + ']');
// Limit characters that can even be pressed
var c = String.fromCharCode(e.which); // Actual character
pressed on keyboard
var allowed =
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890- ';
// if we do not find actual letter in the list, stop.
if (e.which != 8 && allowed.indexOf(c) < 0) return
false; // 8 is backspace
})
$('#the-name').keypress(function() {
var entered = $('#the-name').val();
$('#live').text(entered);
console.log(entered);
});
});
</script>
html parts:
<input type="text" name="the_name" value="" id="the-name"
autocomplete="off" /><br />
http://example.com/<span id="live"></span><br />
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