RegEx for maximum length with dot and replace function in JavaScript -

how can limit length of string replace function.

i need allow stings pattern: 11.11, 99.99, 100.00

1-3 numbers before dot, 1 dot , 2 numbers after dot.

i have this:

value = value.replace(/[^\d.]/, "");

using alternation | operator test both sides of .:

var str="11.11, 99.99, 100.00, 1333.05, 44.999"  console.log(str.replace(/([, ]*\d{4,}\.\d*|\d*\.\d{3,})[, ]*/g, ""));

explanation:

[, ]*: number of , or space
\d{4,}\.\d*: 4 or more digits followed dot , number of digits(match numbers more 4 digits before dot)
\d*\.\d{3,}: number of digits followed dot , 3 or more digits(match numbers more 3 digits after dot)
if 1 of last 2 patterns found followed optional , or space, replace empty string ""

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