How to capitalize a character that appears after a character from specified set of characters in JavaScript?

I wish to capitalize a first character of word that appears after a special character from specified set (array) is found in the string. Also I want ignore any number of spaces that it might have after the character from the array is found in the string but still capitalize the character after the special characters from the set.

Here is my code that I tried but not working:

function capitalizeChar() {
  var wordAfter = ["-", ":", "—", ".", "?", "!"];
  var c = false;
  var words = "welcome:  to the universe.";
  var charactercheck = words.split("");
  for (var i = 0; i < charactercheck.length; i++){
  if (c == true ) {
    if (charactercheck[i]!= ""){
	  charactercheck[i] = charactercheck[i].toUpperCase(); 
	  c=false;  }
    }
	for (var j = 0; j < wordAfter.length; j++) {
		if (charactercheck[i] == wordAfter[j]) {
		c = true; break;
		}
    }
  } 
  console.log(charactercheck.join(""));
  }
capitalizeChar();

But for some reason this code does not seem to be capitalize the 't' of 'To' which appears after the colon ':'. Can someone help, please!

Here is how I solved it by using Dimava 's regex. But Alexander's solution was spot on.

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

function capitalizeChar() {
  var words = "welcome:  to the universe.";
  console.log(words.replace(/([-:—.?!]\s*)(\w)/g, (s, a, b, c) => a + b.toUpperCase()));
}
capitalizeChar();

<!-- end snippet -->

Use a regular expression, should be pretty fast:

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

function capitalizeChar(str, charAfter = ["-", ":", "—", ".", "?", "!"]) {
    const regex = new RegExp(`(?<=[${charAfter.join('')}]\\s*)[a-z]`, 'g');
    return str.replace(regex, s => s.toUpperCase());
}

console.log(capitalizeChar('welcome:  to the universe. and -enjoy your ! suffering.'));

<!-- end snippet -->