How to check if a string contains only numbers?

Question

JavaScript

How to check if the string contains all digits and return false if there are not all digits in the string?

const numberValidator = (val) => {
      let Reg = new RegExp("/^\d+$/");
      return Reg.test(val);
};

Answer 1

<script>
    var str = "123456bukva";
    if(!str.match(/^\d+$/)){
        return false;
    }else{
        return true;
    }
</script>

Probably something like this..