to capital case javascript

1//capitalize only the first letter of the string. 
2function capitalizeFirstLetter(string) {
3    return string.charAt(0).toUpperCase() + string.slice(1);
4}
5//capitalize all words of a string. 
6function capitalizeWords(string) {
7    return string.replace(/(?:^|\s)\S/g, function(a) { return a.toUpperCase(); });
8};

1var str = "Hello World!";
2var res = str.toUpperCase();  //HELLO WORLD!

1const name = 'flavio'
2const nameCapitalized = name.charAt(0).toUpperCase() + name.slice(1)
3

1const toCapitalCase = (string) => {
2    return string.charAt(0).toUpperCase() + string.slice(1);
3};

1function capitalizeFirstLetter(string) {
2  return string.charAt(0).toUpperCase() + string.slice(1);
3}
4
5console.log(capitalizeFirstLetter('foo')); // Foo

1function capitalizeName(name) {
2  return name.replace(/\b(\w)/g, s => s.toUpperCase());
3}
4
5