create and all caps string 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: uppercase and lowercase letters in js

str.toLowerCase()
str.toUpperCase()

Example 3: javascript name capitalization

function capitalizeName(name) {
  return name.replace(/\b(\w)/g, s => s.toUpperCase());
}