javascript on change input value code example

Example 1: javascript change input value

document.getElementById("ID").value = "Tamer Jarrar";

Example 2: javascript input onchange get value

var element = document.getElementById("myInput");
element.onchange = function() {
  console.log(element.value);
}

Example 3: javascript input value change

function updateInput(ish){
    document.getElementById("fieldname").value = ish;
}