如果小数点后面没有数字，则在type =“ number”中忽略小数点

Question

I have a fiddle here that removes the last character from the input when the user types . However it seems .length ignores the decimal when there are no numbers after it.

For example: currently when the user types 20. , it will be cut to 2 instead of 20 .

How can I detect this and remove the decimal once the user types it?

Answer 1

I think your requirement is to ignore it when a user types the period.

So all you need is this (notice the event is on keydown and not keyup ):

$('input').on('keydown', function(e) {
    if (e.keyCode == 190 || e.keyCode == 110){
        e.preventDefault();
    }
});

Or, even easier, attribute the input so it only takes whole numbers :

<input type="number" min="0" step="1"/>