jquery only allow input float number

Question

i\'m making some input mask that allows only float number. But current problem is I can\'t check if multiple dots entered. Can you check those dots and prevent it for me?

Answer 1

Your code seems quite fine but overcomplicated.

First, it is $(this).val().indexOf, because you want to do something with the value.

Second, the event.which == 46 check is inside an if clause that's only passed when event.which != 46, which can never be true.

I ended up with this which works: http://jsfiddle.net/VRa6n/3/.

$('.number').keypress(function(event) {
    if(event.which < 46
    || event.which > 59) {
        event.preventDefault();
    } // prevent if not number/dot

    if(event.which == 46
    && $(this).val().indexOf('.') != -1) {
        event.preventDefault();
    } // prevent if already dot
});