text aplit in letters in span tag using js

var mainTxtChngeBox = document.querySelector(".main-txt-chnge-box"); var mainTxtChngeBoxInner = document.querySelector(".main-txt-chnge-box h2"); var chngTxt = mainTxtChngeBoxInner.textContent.trim(); var chngTxtLetter = chngTxt.split(""); mainTxtChngeBoxInner.innerHTML = ""; chngTxtLetter.forEach(function (letter, index) { var span = document.createElement("span"); span.textContent = letter; span.className = "letter-span-" + index; mainTxtChngeBoxInner.appendChild(span); });