regex to allow only numbers and single dot in jquery

Question

Regex to allow only numbers and single dot when entering number to textbox in jquery.

Please suggest any regex to allow only numbers and single dot in textbox.

I have tried the following code.

$("#amountId").val().replace( /[^0-9]+/g, '')

Answer 1

[-+]?([0-9]*\.[0-9]+|[0-9]+).

See Matching Floating Point Numbers With Regex

Answer 2

This will find something like this 1234.5678
/\d+\.\d+/

Answer 3

This regex should do the trick for you, \d+\.$, and here is a Rubular to prove it. You could even consider prefacing the string with the ^ so that nothing can come before the digits too, like this, ^\d+\.$.

Answer 4

I would try using the following:

\d+\.\d?{2}

http://rubular.com/r/a83BWznDuy