Uppercase first string JavaScript code example

Example 1: first letter tuUppercase

const string = "tHIS STRING'S CAPITALISATION WILL BE FIXED."
const string = string[0].toUpperCase() + string.slice(1)

Example 2: capitalize first carater js

const capitalize = (s) => {
  if (typeof s !== 'string') return ''
  return s.charAt(0).toUpperCase() + s.slice(1)
}

capitalize('flavio') //'Flavio'
capitalize('f')      //'F'
capitalize(0)        //''
capitalize({})       //''