Javascript Pro

"use strict"
document.write('To javascript pro');
document.write('<br />');

let n = 'edinson',
    s = 'carranza';
let body = document.querySelectorAll('body');

let getNameFull = (name, surname) => {
   
  //Get name primary first letter UPPERCASE
   name = name.split('')[0].fontsize(15) + name.replace('e', '');
   
  /*var classH1 = document.createAttribute('class');
      classH1.value = 'isPrincipal';
  
  let encabezado = document.createElement('h1');
  encabezado.setAttributeNode(classH1);
  encabezado.appendChild(body)
 */ 
   
  var xPrint = '-';
  var yPrint = '@';
  
  arr = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,
        15,16,17,18,19,20];
  
  let iPrint;
  let aPrint;
  
  arr.map((element, index, array) => {
      
    if(index > 2){
        
        iPrint = (x) => {
           document.write(x);
        }
        
      } else {
        
        aPrint = (x) => {
          document.write(x)
        }
      }
    
  
  });
  
  iPrint('´´´´´´´´´´´´´´´´´´´´´´');
  aPrint('**********************');
  
  document.write('<br/>');
  document.write(name + ' ' + surname);
  document.write('<br/>');
  
  iPrint('´´´´´´´´´´´´´´´´´´´´´´');
  aPrint('**********************');


   
   
}

getNameFull(n, s);