Javascript regex for allowing only positive digits

Question

I use this to test for digits

/^\d+$/

But I need to make sure that it's greater than zero, while still allowing 0000123123123 for instance.

Answer 1

You can write:

/^\d*[1-9]\d*$/

(zero or more digits, followed by a nonzero digit, followed by zero or more digits).

Answer 2

It is correct regex for positive digits.

 /^[1-9]\d*$/g 

The previous answer not correct for 0123.