regex - Split by Caps in Javascript

Question

I am trying to split up a string by caps using Javascript,

Examples of what Im trying to do:

"HiMyNameIsBob"  ->   "Hi My Name Is Bob"
"GreetingsFriends" -> "Greetings Friends"

I am aware of the str.split() method, however I am not sure how to make this function work with capital letters.

I've tried:

str.split("(?=\p{Upper})")

Unfortunately that doesn't work, any help would be great.

Answer 1

Use RegExp-literals, a look-ahead and [A-Z]:

console.log(
  // -> "Hi My Name Is Bob"
  window.prompt('input string:', "HiMyNameIsBob").split(/(?=[A-Z])/).join(" ")  
)