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2,279 PointsMy Solution to the Challenge
const toggleList = document.getElementById('toggleList');
const listDiv = document.querySelector('.list');
const descriptionInput = document.querySelector('input.description');
const descriptionP = document.querySelector('p.description');
const descriptionButton = document.querySelector('button.description');
const listUl = listDiv.querySelector('ul');
const addItemInput = document.querySelector('input.addItemInput');
const addItemButton = document.querySelector('button.addItemButton');
const lis = listUl.children;
const firstListItem = listUl.firstElementChild;
const lastListItem = listUl.lastElementChild;
firstListItem.style.backgroundColor = 'lightskyblue';
lastListItem.style.backgroundColor = 'lightsteelblue';
function attachListItemButtons(li) {
if (li !== firstListItem) {
let up = document.createElement('button');
up.className = 'up';
up.textContent = 'Up';
li.appendChild(up);
}
if (li !== lastListItem) {
let down = document.createElement('button');
down.className = 'down';
down.textContent = 'Down';
li.appendChild(down);
}
let remove = document.createElement('button');
remove.className = 'remove';
remove.textContent = 'Remove';
li.appendChild(remove);
}
function removeButtonFromListItem (li, buttonType) {
const liChildren = li.children;
for (let i = 0; i < liChildren.length; i += 1) {
if (liChildren[i].className === buttonType) {
li.removeChild(liChildren[i]);
}
}
}
function addButtonToListItem(li, buttonType) {
let button = document.createElement('button');
const liChildren = li.children;
button.className = buttonType;
if (buttonType === 'up') {
button.textContent = 'Up';
} else {
button.textContent = 'Down';
}
for (let i = 0; i < liChildren.length; i += 1) {
if (buttonType === 'up' && liChildren[i].className === 'down') {
li.insertBefore(button, liChildren[i]);
} else if (buttonType === 'down' && liChildren[i].className === 'remove') {
li.insertBefore(button, liChildren[i]);
}
}
}
for (let i = 0; i < lis.length; i +=1) {
attachListItemButtons(lis[i]);
}
listUl.addEventListener('click', (event) => {
if (event.target.tagName == 'BUTTON') {
if (event.target.className == 'remove') {
let li = event.target.parentNode;
let ul = li.parentNode;
ul.removeChild(li);
}
if (event.target.className == 'up') {
let li = event.target.parentNode;
let prevLi = li.previousElementSibling;
let ul = li.parentNode;
if (prevLi) {
ul.insertBefore(li, prevLi);
}
if (li === listUl.firstElementChild) {
removeButtonFromListItem (li, 'up');
addButtonToListItem(prevLi, 'up');
} else if (prevLi === listUl.lastElementChild) {
removeButtonFromListItem (prevLi, 'down');
addButtonToListItem(li, 'down');
}
}
if (event.target.className == 'down') {
let li = event.target.parentNode;
let nextLi = li.nextElementSibling;
let ul = li.parentNode;
if (nextLi) {
ul.insertBefore(nextLi, li);
}
if (li === listUl.lastElementChild) {
removeButtonFromListItem (li, 'down');
addButtonToListItem(nextLi, 'down');
} else if (nextLi === listUl.firstElementChild) {
removeButtonFromListItem (nextLi, 'up');
addButtonToListItem(li, 'up');
}
}
}
});
toggleList.addEventListener('click', () => {
if (listDiv.style.display == 'none') {
toggleList.textContent = 'Hide list';
listDiv.style.display = 'block';
} else {
toggleList.textContent = 'Show list';
listDiv.style.display = 'none';
}
});
descriptionButton.addEventListener('click', () => {
descriptionP.innerHTML = descriptionInput.value + ':';
descriptionInput.value = '';
});
addItemButton.addEventListener('click', () => {
let ul = document.getElementsByTagName('ul')[0];
let li = document.createElement('li');
li.textContent = addItemInput.value;
attachListItemButtons(li);
ul.appendChild(li);
addItemInput.value = '';
});
1 Answer
Adam Lyles Kauffman
14,016 Pointsyou should add comments to this code
Steven Parker
231,236 PointsSteven Parker
231,236 PointsAre you just sharing, or did you have a question about this?