javascript button add input to list item
//Defining a listener for our button, specifically, an onclick handler
document.getElementById("add").onclick = function() {
//First things first, we need our text:
var text = document.getElementById("idea").value; //.value gets input values
//Now construct a quick list element
var li = "<li>" + text + "</li>";
//Now use appendChild and add it to the list!
document.getElementById("list").appendChild(li);
}