$//$ HTML for the up$,$ down, and done buttons

const upButtonHtml $=\text{'}\text{'}$;

const downButtonHtml $=\text{'}\text{'}$;

const doneButtonHtml $=\text{'}\text{'}$;

$$($function$()\{$

$$("$#addBtn"$).$click$($addBtnClick$)$;

$//$ TODO: Add item if user presses Enter

$\})$;

function addBtnClick$()\{$

let itemText $=$ $$("$#newItemText"$).$val$().$trim$()$;

$//$ Don't add empty strings

if $($itemText$.$length $!==0)\{$

addItem$($itemText$)$;

$//$ Clear text and put focus back in text input

$$("$#newItemText"$).$val$("").$focus$()$;

$\}$

$\}$

function addItem$($item$)\{$

$//$ Create a new