Regex to allow infinite precision

Question

Following regex only allow till 2 precisions

/^\d+(\.\d{1,2})?$/,

But it should allow any precssion ..how to change this regex to allow any precision value?

Like 12.212121212121212121212...

Now it only take two precision ... 1223232323.23

I have tried this not working ..

/^\d+(\.\d{1,All})?$/,

Answer 1

/^\\d+(\\.\\d{1,})?$/

要么：

/^\\d+(\\.\\d+)?$/

Answer 2

应该这样：

/^\d+(\.\d+)?$/