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London|ITP-Jan-2026 |Ping Wang | Sprint 2 | Book library #408

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London|ITP-Jan-2026 |Ping Wang | Sprint 2 | Book library #408

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7cc289a
correction comparison
pathywang Mar 30, 2026
af21b0b
correction declare variable name
pathywang Mar 30, 2026
1412d94
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pathywang Mar 30, 2026
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pathywang Mar 30, 2026
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pathywang Mar 30, 2026
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pathywang Apr 8, 2026
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pathywang Apr 8, 2026
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75 changes: 34 additions & 41 deletions debugging/book-library/index.html
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,20 +1,20 @@
<!DOCTYPE html>
<html>
<html lang="en">
<head>
<title> </title>
<meta
charset="utf-8"
name="viewport"
content="width=device-width, initial-scale=1.0"
/>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">

<title>Library</title>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>

<link
rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
/>
<link rel="stylesheet" type="text/css" href="style.css" />
>
<link rel="stylesheet" href="style.css">
</head>

<body>
Expand All @@ -27,50 +27,51 @@ <h1>Library</h1>
Add new book
</button>

<div id="demo" class="collapse">
<div class="form-group">
<div id="demo" class="collapse mt-3">
<form id="book-form" class="form-group">
<label for="title">Title:</label>
<input
type="title"
type="text"
class="form-control"
id="title"
name="title"
required
/>
<label for="author">Author: </label>
>

<label for="author" class="mt-2">Author:</label>
<input
type="author"
type="text"
class="form-control"
id="author"
name="author"
required
/>
<label for="pages">Pages:</label>
>

<label for="pages" class="mt-2">Pages:</label>
<input
type="number"
class="form-control"
id="pages"
name="pages"
required
/>
<label class="form-check-label">
>

<div class="form-check mt-2">
<input
type="checkbox"
class="form-check-input"
id="check"
value=""
/>Read
</label>
<input
type="submit"
value="Submit"
class="btn btn-primary"
onclick="submit();"
/>
</div>
>
<label class="form-check-label" for="check">Read</label>
</div>

<button type="submit" class="btn btn-primary mt-3">
Submit
</button>
</form>
</div>

<table class="table" id="display">
<table class="table mt-4" id="display">
<thead class="thead-dark">
<tr>
<th>Title</th>
Expand All @@ -80,17 +81,9 @@ <h1>Library</h1>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
<tbody></tbody>
</table>

<script src="script.js"></script>
<script type="module" src="script.js"></script>
</body>
</html>
</html>
166 changes: 87 additions & 79 deletions debugging/book-library/script.js
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Original file line number Diff line number Diff line change
@@ -1,103 +1,111 @@
let myLibrary = [];
const myLibrary = [];

window.addEventListener("load", function (e) {
populateStorage();
window.addEventListener("load", () => {
populateLibrary();
render();
});

function populateStorage() {
if (myLibrary.length == 0) {
let book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
let book2 = new Book(
"The Old Man and the Sea",
"Ernest Hemingway",
"127",
true
);
myLibrary.push(book1);
myLibrary.push(book2);
render();
function populateLibrary() {
if (myLibrary.length !== 0) {
return;
}

myLibrary.push(
new Book("Robinson Crusoe", "Daniel Defoe", 252, true),
new Book("The Old Man and the Sea", "Ernest Hemingway", 127, true)
);
}

const title = document.getElementById("title");
const author = document.getElementById("author");
const pages = document.getElementById("pages");
const check = document.getElementById("check");
const titleInput = document.getElementById("title");
const authorInput = document.getElementById("author");
const pagesInput = document.getElementById("pages");
const readCheckbox = document.getElementById("check");
const tableBody = document.querySelector("#display tbody");

//check the right input from forms and if its ok -> add the new book (object in array)
//via Book function and start render function
function submit() {
if (
title.value == null ||
title.value == "" ||
pages.value == null ||
pages.value == ""
) {
alert("Please fill all fields!");
return false;
} else {
let book = new Book(title.value, title.value, pages.value, check.checked);
library.push(book);
render();
// .value is always a string, never null
const title = titleInput.value.trim();
const author = authorInput.value.trim();
const pages = Number(pagesInput.value);

// Reject empty strings, whitespace-only strings, invalid page counts
if (title === "" || author === "") {
alert("Title and author cannot be empty.");
return;
}

if (!Number.isInteger(pages) || pages <= 0) {
alert("Page count must be a positive whole number.");
return;
}

myLibrary.push(
new Book(title, author, pages, readCheckbox.checked)
);

render();
}

function Book(title, author, pages, check) {
function Book(title, author, pages, hasRead) {
this.title = title;
this.author = author;
this.pages = pages;
this.check = check;
this.hasRead = hasRead;
}

function render() {
let table = document.getElementById("display");
let rowsNumber = table.rows.length;
//delete old table
for (let n = rowsNumber - 1; n > 0; n-- {
table.deleteRow(n);
}
//insert updated row and cells
let length = myLibrary.length;
for (let i = 0; i < length; i++) {
let row = table.insertRow(1);
let titleCell = row.insertCell(0);
let authorCell = row.insertCell(1);
let pagesCell = row.insertCell(2);
let wasReadCell = row.insertCell(3);
let deleteCell = row.insertCell(4);
titleCell.innerHTML = myLibrary[i].title;
authorCell.innerHTML = myLibrary[i].author;
pagesCell.innerHTML = myLibrary[i].pages;

//add and wait for action for read/unread button
let changeBut = document.createElement("button");
changeBut.id = i;
changeBut.className = "btn btn-success";
wasReadCell.appendChild(changeBut);
let readStatus = "";
if (myLibrary[i].check == false) {
readStatus = "Yes";
} else {
readStatus = "No";
}
changeBut.innerText = readStatus;

changeBut.addEventListener("click", function () {
myLibrary[i].check = !myLibrary[i].check;
// Clear all existing rows in one operation
tableBody.textContent = "";

myLibrary.forEach((book, index) => {
const row = document.createElement("tr");

const titleCell = document.createElement("td");
titleCell.textContent = book.title;

const authorCell = document.createElement("td");
authorCell.textContent = book.author;

const pagesCell = document.createElement("td");
pagesCell.textContent = book.pages;

const readCell = document.createElement("td");
const toggleReadButton = document.createElement("button");
toggleReadButton.className = "btn btn-success";
toggleReadButton.textContent = book.hasRead ? "Yes" : "No";

toggleReadButton.addEventListener("click", () => {
book.hasRead = !book.hasRead;
render();
});

//add delete button to every row and render again
let delButton = document.createElement("button");
delBut.id = i + 5;
deleteCell.appendChild(delBut);
delBut.className = "btn btn-warning";
delBut.innerHTML = "Delete";
delBut.addEventListener("clicks", function () {
alert(`You've deleted title: ${myLibrary[i].title}`);
myLibrary.splice(i, 1);
readCell.appendChild(toggleReadButton);

const deleteCell = document.createElement("td");
const deleteButton = document.createElement("button");
deleteButton.className = "btn btn-warning";
deleteButton.textContent = "Delete";

deleteButton.addEventListener("click", () => {
const deletedTitle = book.title;

myLibrary.splice(index, 1);
render();

alert(`Deleted: ${deletedTitle}`);
});
}

deleteCell.appendChild(deleteButton);

row.append(
titleCell,
authorCell,
pagesCell,
readCell,
deleteCell
);

tableBody.appendChild(row);
});
}

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