javascript first character to uppercase 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: javascript capitalize first letter

const lower = 'this is an entirely lowercase string';
const upper = lower.charAt(0).toUpperCase() + lower.substring(1);

Example 3: js capitalize first letter

// this will only capitalize the first word
var name = prompt("What is your name");
firstLetterUpper = name.slice(0,1).toUpperCase();

alert("Hello " + firstLetterUpper + name.slice(1, name.length).toLowerCase());