Test if string contains only characters

Question

The goal is to compose a regex using the.test() or.match() to check if a string contains all numbers.

For example:

1. str "10001" should return true
2. str "1ab001" should return false

So far my regex looks like this:

str.match("^[0-9]*$")

I'm getting null returned

I am also looking for ways to do this using the.test() method which will return true or false.

Any help with working with regex is greatly appreciated.

Answer 1

Your regexp is correct. Using regexp literal you will be able to use test:

/^[0-9]*$/.test('10001')
-> true

/^[0-9]*$/.test('10ab001')
-> false