Spred/rest operator is only available in Esb(use esversion:6)

Hi when i try to use the spred/rest operator or arrow functions in the challanges i get this warning …
spred/rest operator is only available in Es6(use esversion:6) … just wondering why as i have seen others code using the arrow function. Im use a chrome browser and in the developer i have no problem using them.Thanks for any info on this.

Thank you …all sorted

Even without that line, your code will work just fine, it’ll just gripe about it.