Answer 1

Use input field to get the input from the user

Add a button....when clicked a function is called that will store each letter of word in an array

<input type="text" id="my-text"></input>
<button onclick="createArray()">CLICK</button>

<script>
function createArray()
{
var val = document.getElementById("my-text").value;
var arr = [];
if(val != "")
{
for(var i=0; i<val.length; i++)
{
arr.push(val.charAt(i));
}
}
console.log(arr);
}
</script>