splice (JavaScript Array Method)

const tnwNames = ["Hla", "Mya", "Soe", "Moe", "Noe"];

function tnwFun1(){
    document.getElementById("demo").innerHTML = tnwNames.join(", ");
}

function tnwFun2(){
    document.getElementById("demo").innerHTML = "The original array is : 
" + tnwNames.join(", ");
    let result = tnwNames.splice(2, 2, "Aung", "Kyaw", "Tun");
    document.getElementById("demo1").innerHTML = "The removed elements are : 
" + result.join(", ");
    document.getElementById("demo2").innerHTML = "The new array is : 
" + tnwNames.join(", ");
}