Question

i want to check for certain regex expression to make sure some string is followed by ‘::’ and some number. The number can be between 1 and 999999999999.

for example: ‘ACME LOCK & KEY::42443’ should pass where ‘ABC Inc.’ should fail.

any help?

Answer 1

Try this:

/::[1-9]\d{0,11}$/.test(str)

This will return true for every string that ends with :: followed by an integer between 1 and 999999999999 inclusive.