how to capitalize every first letter in a word with javascript code example

Example 1: javascript capitalize words

//capitalize only the first letter of the string. 
function capitalizeFirstLetter(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
}
//capitalize all words of a string. 
function capitalizeWords(string) {
    return string.replace(/(?:^|\s)\S/g, function(a) { return a.toUpperCase(); });
};

Example 2: capitalize first letter of all word typescript

//Altered, "capitalize all words of a string" (javascript by Grepper on Jul 22 2019) answer to compatible with TypeScript

var myString = 'abcd abcd';

capitalizeWords(text){
  return text.replace(/(?:^|\s)\S/g,(res)=>{ return res.toUpperCase();})
};

console.log(capitalizeWords(myString));

//result = "Abcd Abcd"