Javascript Code Captialize First Word of Each Sentence

Javascript Single Line Code to Capitalize First Word of Each Sentence Going on the Assumption a Sentence Ends with a Period . Question Mark ? or Exclamation Point !

One line code to capitalize first first word of each sentence, going on the assumption the end of a sentence is marked by a period . question mark ? or exclamation point !.

str = str.replace(/(?<=(?:^|[.?!])\W*)[a-z]/g, i => i.toUpperCase());