Answers for "regular expression first letter uppercase"

regex only uppercase letters js

if (value.match(/^[A-Z]*$/)) {
    // matches
} else {
    // doesn't match
}

name first letter uppercase

// name er first letter uppercase 
let name = "aminul islam rasel" //Aminul Islam Rasel

        let word = name.split(" ") // create  array each word
        word[0] = word[0].charAt(0).toUpperCase() + word[0].slice(1)
        word[1] = word[1].charAt(0).toUpperCase() + word[1].slice(1)
        word[2] = word[2].charAt(0).toUpperCase() + word[2].slice(1)

        name = word.join(" ")// get Aminul Islam Rasel

        console.log(name);//show console


// array map method use kore
  let name = "abdur razzak hassan tusher mafus ulla"
        let word = name.split(" ")
        word = word.map(function (value) {
            return value.charAt(0).toUpperCase() + value.slice(1)
        })

        name = word.join(" ")
        console.log(name);