Trying to convert this into prototype to format Number into phone number

Having problems getting this prototype function to work to format a number into a phone number format.

Number.prototype.toPhone = function () {
    myStr=this.toString().replace(/(\d{3})(\d{3})(\d{4})/, '$1-$2-$3');
    return myStr
}

JavaScript

Last Comment

leakim971

8/22/2022 - Mon

ASKER CERTIFIED SOLUTION

12/27/2013

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stargateatlantis

12/28/2013

ASKER

So how come you can't execute it like this

var myNumber=1111111111;

console.log(myNumber.toPhone);

leakim971

12/28/2013

Add parentheses :

var myNumber=1111111111;

console.log(myNumber.toPhone());