Abbreviate a Two Word Name.js

/*
 Abbreviate a Two Word Name

ESCRIPTION:

  Write a function to convert a name into initials. This kata strictly takes two words with one space in between them.
  
  The output should be two capital letters with a dot separating them.
  
  It should look like this:
  
  Sam Harris => S.H
  
  patrick feeney => P.F

SOLUTION: 
*/
const abbrevName = (name) => name.split(" ").map(el => el.substring(0,1).toUpperCase()).join(".")