Want Auto Capital First Letter of Username, First Name, Last Name

Hi,

Not sure if this is what you are looking for.

If you want to use CSS, here’s an example.

/* CSS */
.capitalize {
  text-transform: capitalize; /* Init cap first letter of every word. */
}

<!-- HTML -->
<p class="capitalize">this is cool</p>

How to add CSS to WordPress.

Here’s an example of init cap only first letter of sentence using JavaScript.

let someString = "this is cool!";
console.log(someString[0].toUpperCase() + someString.slice(1));

Live demo for both examples.

Shout if you have any questions.