http://www.freecodecamp.com/srkama 's solution for Bonfire: Truncate a string

bonfire-truncate-a-string?solution=function%20truncate(str%2C%20num)%20%7B%0A%20%20%2F%2F%20Clear%20out%20that%20junk%20in%20your%20trunk%0A%20%20if(num%3Cstr.length)%20%7B%0A%20%20%20%20return%20num%3E3%20%3F%20str.slice(0%2Cnum-3).concat(%27...%27)%3Astr.slice(0%2Cnum).concat(%27...%27)%3B%0A%20%20%7D%0A%20%20return%20str%3B%0A%7D%0A%0Atruncate(%22A-tisket%20a-tasket%20A%20green%20and%20yellow%20basket%22%2C%2011)%3B%0A.js

// Bonfire: Truncate a string
// Author: @srkama
// Challenge: http://www.freecodecamp.com/challenges/bonfire-truncate-a-string?solution=function%20truncate(str%2C%20num)%20%7B%0A%20%20%2F%2F%20Clear%20out%20that%20junk%20in%20your%20trunk%0A%20%20if(num%3Cstr.length)%20%7B%0A%20%20%20%20return%20num%3E3%20%3F%20str.slice(0%2Cnum-3).concat(%27...%27)%3Astr.slice(0%2Cnum).concat(%27...%27)%3B%0A%20%20%7D%0A%20%20return%20str%3B%0A%7D%0A%0Atruncate(%22A-tisket%20a-tasket%20A%20green%20and%20yellow%20basket%22%2C%2011)%3B%0A
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function truncate(str, num) {
  // Clear out that junk in your trunk
  if(num<str.length) {
    return num>3 ? str.slice(0,num-3).concat('...'):str.slice(0,num).concat('...');
  }
  return str;
}

truncate("A-tisket a-tasket A green and yellow basket", 11);