Make input to get only numbers with two decimal places

Question

Currently I am using following jQuery code to filter only digits:

$('#input_field').keyup(function(e) {
    if (/\D/g.test(this.value)) {
        this.value = this.value.replace(/\D/g, '');
    }
});

But I want to get floating point numbers(upto to 2 decimal places) like this:

10.2
1.23
1000.10

Answer 1

Try this regex:

/^\d+(\.\d{0,2})?$/

Your JS:

$('#input_field').keyup(function(e) {
    var regex = /^\d+(\.\d{0,2})?$/g;
    if (!regex.test(this.value)) {
        this.value = '';
    }
});

Answer 2

try

toFixed(2)

eg:

var number = 2.234239;
var numberfixed=number.toFixed(2);