Need Help In Validate US Telephone Numbers

JavaScript
1

Tell us what’s happening:

Your code so far

function telephoneCheck(str) {
  // Good luck!
//   str.replace(/[#_]/g,'');
  var str1;
  var value;
  str1=str.replace(/[-()\s]/g,'');
 
   if(str.length>11)
  {
    for(var j=0;j<str.length;j++)
    {    
      if(str[j]==")" || str[j]=="(")
      {
         return false;
      }  
    } 
  }
  if(str1.length==10)
  {  
    for(var i=0;i<str1.length;i++)
    {
      if(str1[i]!==isNaN())
      {
        return true;

      } 


    }
    
  } 
  
  if(str1.length==11 && str1[0]==1)
    {
      return true;
    }   
  
 

    return false;
  
}



telephoneCheck("(555-555-5555");

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/validate-us-telephone-numbers

2

Please explain what it is you need help with. We can’t help you if you only post code without asking any questions.