How to Uppercase the first letter of a string in JavaScript

JavaScript doesn’t have any built-in methods to uppercase the first letter of string but we can do it by using the slice() and charAt() methods.

First, we need to access the first character of a string by using the charAt() method then convert it to uppercase, and concat with the string by slicing the first character.

const str = 'javascript';
str.charAt(0).toUpperCase()+str.slice(1);

//output -> 'Javascript'

You can also create your function.

function capitalize(str){
  return str.charAt(0).toUpperCase()+str.slice(1);}


capitalize('gowtham') // Gowtham

capitalize('reactgo') // Reactgo

Second way

We can also access the first character of a string by using its index instead of using charAt() method.

function capitalize(str){
     return str[0].toUpperCase()+str.slice(1)}

capitalize('javascript') //  Javascript

The second solution is the fastest compared to the first one.