From da9328ef81f06e5559fd2e35407e15cda79c5337 Mon Sep 17 00:00:00 2001
From: Alina Sofragiu <sofragiualina@gmail.com>
Date: Mon, 3 Aug 2026 19:00:51 +0100
Subject: [PATCH 1/2] Refactor book submission and rendering logic for improved
 clarity and functionality

---
 debugging/book-library/script.js | 55 ++++++++++++++++++--------------
 1 file changed, 31 insertions(+), 24 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d..312b8718 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,6 +1,6 @@
 let myLibrary = [];
 
-window.addEventListener("load", function (e) {
+window.addEventListener("load", function () {
   populateStorage();
   render();
 });
@@ -16,7 +16,6 @@ function populateStorage() {
     );
     myLibrary.push(book1);
     myLibrary.push(book2);
-    render();
   }
 }
 
@@ -25,20 +24,20 @@ const author = document.getElementById("author");
 const pages = document.getElementById("pages");
 const check = document.getElementById("check");
 
-//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 == ""
-  ) {
+  if (title.value === "" || author.value === "" || 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);
+    let book = new Book(title.value, author.value, pages.value, check.checked);
+
+    myLibrary.push(book);
+
+    title.value = "";
+    author.value = "";
+    pages.value = "";
+    check.checked = false;
+
     render();
   }
 }
@@ -53,12 +52,15 @@ function Book(title, author, pages, check) {
 function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;
-  //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
+
+  // delete old table rows
+  for (let n = rowsNumber - 1; n > 0; n--) {
     table.deleteRow(n);
   }
-  //insert updated row and cells
+
+  // insert updated rows
   let length = myLibrary.length;
+
   for (let i = 0; i < length; i++) {
     let row = table.insertRow(1);
     let titleCell = row.insertCell(0);
@@ -66,35 +68,40 @@ function render() {
     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
+    // Read button
     let changeBut = document.createElement("button");
     changeBut.id = i;
     changeBut.className = "btn btn-success";
-    wasReadCell.appendChild(changeBut);
+
     let readStatus = "";
-    if (myLibrary[i].check == false) {
+    if (myLibrary[i].check === true) {
       readStatus = "Yes";
     } else {
       readStatus = "No";
     }
+
     changeBut.innerText = readStatus;
+    wasReadCell.appendChild(changeBut);
 
     changeBut.addEventListener("click", function () {
       myLibrary[i].check = !myLibrary[i].check;
       render();
     });
 
-    //add delete button to every row and render again
+    // Delete button
     let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    deleteCell.appendChild(delBut);
-    delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    delButton.id = i + 5;
+    delButton.className = "btn btn-warning";
+    delButton.innerHTML = "Delete";
+
+    deleteCell.appendChild(delButton);
+
+    delButton.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();

From c28263f518fedd8a78ae7cf00d8ae919530054ae Mon Sep 17 00:00:00 2001
From: Alina Sofragiu <sofragiualina@gmail.com>
Date: Wed, 5 Aug 2026 21:02:44 +0100
Subject: [PATCH 2/2] Enhance HTML structure and improve JavaScript
 functionality for book library

---
 debugging/book-library/index.html |  79 ++++++---------
 debugging/book-library/script.js  | 153 ++++++++++++++----------------
 debugging/book-library/style.css  |   4 +-
 3 files changed, 101 insertions(+), 135 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa71..05d8c33a 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -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>My Book 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>
@@ -23,49 +23,31 @@ <h1>Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 
-    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
+    <button class="btn btn-info" data-toggle="collapse" data-target="#demo">
       Add new book
     </button>
 
     <div id="demo" class="collapse">
       <div class="form-group">
-        <label for="title">Title:</label>
-        <input
-          type="title"
-          class="form-control"
-          id="title"
-          name="title"
-          required
-        />
-        <label for="author">Author: </label>
-        <input
-          type="author"
-          class="form-control"
-          id="author"
-          name="author"
-          required
-        />
-        <label for="pages">Pages:</label>
-        <input
-          type="number"
-          class="form-control"
-          id="pages"
-          name="pages"
-          required
-        />
+        <label for="title">Title</label>
+        <input type="text" id="title" class="form-control" required />
+
+        <label for="author">Author</label>
+        <input type="text" id="author" class="form-control" required />
+
+        <label for="pages">Pages</label>
+        <input type="number" id="pages" class="form-control" min="1" required />
+
         <label class="form-check-label">
-          <input
-            type="checkbox"
-            class="form-check-input"
-            id="check"
-            value=""
-          />Read
+          <input type="checkbox" id="check" class="form-check-input" />
+          Read
         </label>
+
         <input
           type="submit"
           value="Submit"
           class="btn btn-primary"
-          onclick="submit();"
+          onclick="submit()"
         />
       </div>
     </div>
@@ -75,22 +57,15 @@ <h1>Library</h1>
         <tr>
           <th>Title</th>
           <th>Author</th>
-          <th>Number of Pages</th>
+          <th>Pages</th>
           <th>Read</th>
-          <th></th>
+          <th>Delete</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 src="script.js" type="module"></script>
   </body>
 </html>
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 312b8718..65d857da 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,110 +1,103 @@
-let myLibrary = [];
+const myLibrary = [];
 
-window.addEventListener("load", function () {
+window.addEventListener("load", () => {
   populateStorage();
   render();
 });
 
+function Book(title, author, pages, check) {
+  this.title = title;
+  this.author = author;
+  this.pages = pages;
+  this.check = check;
+}
+
 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
+  if (myLibrary.length === 0) {
+    myLibrary.push(
+      new Book("Robinson Crusoe", "Daniel Defoe", 252, true),
+      new Book("The Old Man and the Sea", "Ernest Hemingway", 127, true)
     );
-    myLibrary.push(book1);
-    myLibrary.push(book2);
   }
 }
 
-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 checkInput = document.getElementById("check");
 
 function submit() {
-  if (title.value === "" || author.value === "" || pages.value === "") {
+  const title = titleInput.value.trim();
+  const author = authorInput.value.trim();
+  const pages = Number(pagesInput.value);
+
+  if (title === "" || author === "" || !pages) {
     alert("Please fill all fields!");
-    return false;
-  } else {
-    let book = new Book(title.value, author.value, pages.value, check.checked);
+    return;
+  }
 
-    myLibrary.push(book);
+  myLibrary.push(new Book(title, author, pages, checkInput.checked));
 
-    title.value = "";
-    author.value = "";
-    pages.value = "";
-    check.checked = false;
+  titleInput.value = "";
+  authorInput.value = "";
+  pagesInput.value = "";
+  checkInput.checked = false;
 
-    render();
-  }
+  render();
 }
 
-function Book(title, author, pages, check) {
-  this.title = title;
-  this.author = author;
-  this.pages = pages;
-  this.check = check;
-}
+window.submit = submit;
 
 function render() {
-  let table = document.getElementById("display");
-  let rowsNumber = table.rows.length;
+  const tbody = document.querySelector("#display tbody");
 
-  // delete old table rows
-  for (let n = rowsNumber - 1; n > 0; n--) {
-    table.deleteRow(n);
-  }
+  tbody.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 readButton = document.createElement("button");
+    readButton.className = "btn btn-success";
+    readButton.textContent = book.check ? "Yes" : "No";
 
-  // insert updated rows
-  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;
-
-    // Read button
-    let changeBut = document.createElement("button");
-    changeBut.id = i;
-    changeBut.className = "btn btn-success";
-
-    let readStatus = "";
-    if (myLibrary[i].check === true) {
-      readStatus = "Yes";
-    } else {
-      readStatus = "No";
-    }
-
-    changeBut.innerText = readStatus;
-    wasReadCell.appendChild(changeBut);
-
-    changeBut.addEventListener("click", function () {
-      myLibrary[i].check = !myLibrary[i].check;
+    readButton.addEventListener("click", () => {
+      book.check = !book.check;
       render();
     });
 
-    // Delete button
-    let delButton = document.createElement("button");
-    delButton.id = i + 5;
-    delButton.className = "btn btn-warning";
-    delButton.innerHTML = "Delete";
+    readCell.appendChild(readButton);
 
-    deleteCell.appendChild(delButton);
+    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);
 
-    delButton.addEventListener("click", function () {
-      alert(`You've deleted title: ${myLibrary[i].title}`);
-      myLibrary.splice(i, 1);
       render();
+
+      alert(`You've deleted "${deletedTitle}".`);
     });
-  }
+
+    deleteCell.appendChild(deleteButton);
+
+    row.append(titleCell, authorCell, pagesCell, readCell, deleteCell);
+
+    tbody.appendChild(row);
+  });
 }
diff --git a/debugging/book-library/style.css b/debugging/book-library/style.css
index 302950cb..f4514475 100644
--- a/debugging/book-library/style.css
+++ b/debugging/book-library/style.css
@@ -1,7 +1,5 @@
 .form-group {
   width: 400px;
-  height: 300px;
-  align-self: left;
   padding-left: 20px;
 }
 
@@ -11,7 +9,7 @@
 
 .form-check-label {
   padding-left: 20px;
-  margin: 5px 0px 5px 0px;
+  margin: 5px 0;
 }
 
 button.btn-info {