From 2aa2f27286ced424361a8b361da1f54801205d1f Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Thu, 11 Dec 2025 13:35:02 +0000
Subject: [PATCH 01/12] input type = text

---
 debugging/book-library/index.html | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa71..2628651d 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -31,7 +31,7 @@ <h1>Library</h1>
       <div class="form-group">
         <label for="title">Title:</label>
         <input
-          type="title"
+          type="text"
           class="form-control"
           id="title"
           name="title"
@@ -39,7 +39,7 @@ <h1>Library</h1>
         />
         <label for="author">Author: </label>
         <input
-          type="author"
+          type="text"
           class="form-control"
           id="author"
           name="author"

From ac86ff2c387143a20bf5aa98fff17052d5340ea9 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Thu, 11 Dec 2025 13:47:45 +0000
Subject: [PATCH 02/12] use type=button instead of type=submit to prevent form
 submitting and page reloading

---
 debugging/book-library/index.html | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 2628651d..1749c29a 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -61,12 +61,11 @@ <h1>Library</h1>
             value=""
           />Read
         </label>
-        <input
-          type="submit"
-          value="Submit"
+        <button
+          type="button"
           class="btn btn-primary"
-          onclick="submit();"
-        />
+          id="submitBtn"
+          >Submit</button>
       </div>
     </div>
 

From 2297934ced10cfb7e89ba981960912ae13e35fe2 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 12:06:07 +0000
Subject: [PATCH 03/12] first draft

---
 debugging/book-library/script.js | 132 ++++++++++++++++---------------
 1 file changed, 70 insertions(+), 62 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d..0b2ca621 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,103 +1,111 @@
 let myLibrary = [];
 
-window.addEventListener("load", function (e) {
+window.addEventListener("load", function () {
   populateStorage();
   render();
+  const submitBtn = document.getElementById("submitBtn");
+  submitBtn.addEventListener("click", submit);
 });
 
 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
-    );
+    const book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
+    const book2 = new Book("The Old Man and the Sea","Ernest Hemingway","127", true);
     myLibrary.push(book1);
     myLibrary.push(book2);
-    render();
   }
 }
 
-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");
 
 //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 == ""
+    titleInput.value == null ||
+    titleInput.value == "" ||
+    pagesInput.value == null ||
+    pagesInput.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();
+  } 
+  if (isNaN(Number(pagesVal)) || Number(pagesVal) <= 0) {
+    alert("Please enter a valid number of pages!");
+    return false;
   }
+
+  const book = new Book(titleVal, authorVal, pagesValue, readCheckBox.checked);
+  myLibrary.push(book);
+  titleInput.value = "";
+  authorInput.value = "";
+  pagesInput.value = "";
+  readCheckBox.checked = false;
+  render();
+  return true;
 }
 
-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 = Boolean(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);
+  const table = document.getElementById("display");
+  const tbody = table.querySelector("tbody");
+  while (tbody.firstChild) {
+    tbody.removeChild(tbody.firstChild);
   }
-  //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;
+  for (let i = 0; i < myLibrary.length; i++) {
+    const book = myLibrary[i];
+    const row = document.createElement("tr");
+
+    const titleCell = document.createElement("td");
+    titleCell.textContent = book.title;
+    row.appendChild(titleCell);
 
+    const authorCell = document.createElement("td");
+    authorCell.textContent = book.author;
+    row.appendChild(authorCell);
+
+    const pagesCell = document.createElement("td");
+    pagesCell.textContent = book.pages;
+    row.appendChild(pagesCell);
+
+    const wasReadCell = document.createElement("td");
+    const changeBut = document.createElement("button");
+    changeBut.className = "btn btn-success";
+    changeBut.textContent = book.hasRead ? "Yes" : "No";
+    changeBut.dataset.index = i;
     changeBut.addEventListener("click", function () {
-      myLibrary[i].check = !myLibrary[i].check;
+      const index = Number(this.dataset.index);
+      myLibrary[index].hasRead = !myLibrary[index].hasRead;
       render();
     });
+    wasReadCell.appendChild(changeBut);
+    row.appendChild(wasReadCell);
 
-    //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);
+    //delete button
+    const deleteCell = document.createElement("td");
+    const delButton = document.createElement("button");
+    delButton.className = "btn btn-warning";
+    delButton.textContent = "Delete";
+    delButton.dataset.index = i;
+    delButton.addEventListener("click", function () {
+      const index = Number(this.dataset.index);
+      alert(`You've deleted title: ${myLibrary[index].title}`);
+      myLibrary.splice(index, 1);
       render();
     });
+    deleteCell.appendChild(delButton);
+    row.appendChild(deleteCell);
+
+    tbody.appendChild(row);
   }
 }

From ca01638f61e791d6fff748aaa3809bc293a4e8c8 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 12:08:56 +0000
Subject: [PATCH 04/12] html bug fix

---
 debugging/book-library/index.html | 70 ++++++++-----------------------
 1 file changed, 17 insertions(+), 53 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 1749c29a..4dd8b782 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,20 +1,15 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title> </title>
-    <meta
-      charset="utf-8"
-      name="viewport"
-      content="width=device-width, initial-scale=1.0"
-    />
+    <title>Library</title>
+    <meta charset="utf-8" name="viewport" content="width=device-width, initial-scale=1.0" />
+
     <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="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" />
+
+    <link rel="stylesheet" href="style.css" />
   </head>
 
   <body>
@@ -30,42 +25,19 @@ <h1>Library</h1>
     <div id="demo" class="collapse">
       <div class="form-group">
         <label for="title">Title:</label>
-        <input
-          type="text"
-          class="form-control"
-          id="title"
-          name="title"
-          required
-        />
+        <input type="text" class="form-control" id="title" name="title" required />
+
         <label for="author">Author: </label>
-        <input
-          type="text"
-          class="form-control"
-          id="author"
-          name="author"
-          required
-        />
+        <input type="text" 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 class="form-check-label">
-          <input
-            type="checkbox"
-            class="form-check-input"
-            id="check"
-            value=""
-          />Read
+        <input type="number" class="form-control" id="pages" name="pages" required />
+
+        <label class="form-check-label mt-2">
+          <input type="checkbox" class="form-check-input" id="check" /> Read
         </label>
-        <button
-          type="button"
-          class="btn btn-primary"
-          id="submitBtn"
-          >Submit</button>
+
+        <button type="button" class="btn btn-primary mt-3" id="submitBtn">Submit</button>
       </div>
     </div>
 
@@ -79,15 +51,7 @@ <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>

From 0b493a3c58ca845293c93df103c67450568ceeed Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 12:09:13 +0000
Subject: [PATCH 05/12] script.js bug fixes

---
 debugging/book-library/script.js | 102 +++++++++++++------------------
 1 file changed, 42 insertions(+), 60 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 0b2ca621..2456842d 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -3,16 +3,13 @@ let myLibrary = [];
 window.addEventListener("load", function () {
   populateStorage();
   render();
-  const submitBtn = document.getElementById("submitBtn");
-  submitBtn.addEventListener("click", submit);
+  document.getElementById("submitBtn").addEventListener("click", submit);
 });
 
 function populateStorage() {
-  if (myLibrary.length == 0) {
-    const book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
-    const book2 = new Book("The Old Man and the Sea","Ernest Hemingway","127", true);
-    myLibrary.push(book1);
-    myLibrary.push(book2);
+  if (myLibrary.length === 0) {
+    myLibrary.push(new Book("Robinson Crusoe", "Daniel Defoe", 252, true));
+    myLibrary.push(new Book("The Old Man and the Sea", "Ernest Hemingway", 127, true));
   }
 }
 
@@ -21,29 +18,29 @@ const authorInput = document.getElementById("author");
 const pagesInput = document.getElementById("pages");
 const readCheckBox = 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 (
-    titleInput.value == null ||
-    titleInput.value == "" ||
-    pagesInput.value == null ||
-    pagesInput.value == ""
-  ) {
+  const titleVal = titleInput.value.trim();
+  const authorVal = authorInput.value.trim();
+  const pagesVal = pagesInput.value.trim();
+
+  if (!titleVal || !authorVal || !pagesVal) {
     alert("Please fill all fields!");
     return false;
-  } 
+  }
+
   if (isNaN(Number(pagesVal)) || Number(pagesVal) <= 0) {
     alert("Please enter a valid number of pages!");
     return false;
   }
 
-  const book = new Book(titleVal, authorVal, pagesValue, readCheckBox.checked);
+  const book = new Book(titleVal, authorVal, Number(pagesVal), readCheckBox.checked);
   myLibrary.push(book);
+
   titleInput.value = "";
   authorInput.value = "";
   pagesInput.value = "";
   readCheckBox.checked = false;
+
   render();
   return true;
 }
@@ -56,56 +53,41 @@ function Book(title, author, pages, hasRead) {
 }
 
 function render() {
-  const table = document.getElementById("display");
-  const tbody = table.querySelector("tbody");
-  while (tbody.firstChild) {
-    tbody.removeChild(tbody.firstChild);
-  }
+  const tbody = document.querySelector("#display tbody");
+  tbody.innerHTML = "";
 
-  for (let i = 0; i < myLibrary.length; i++) {
-    const book = myLibrary[i];
+  myLibrary.forEach((book, i) => {
     const row = document.createElement("tr");
 
-    const titleCell = document.createElement("td");
-    titleCell.textContent = book.title;
-    row.appendChild(titleCell);
-
-    const authorCell = document.createElement("td");
-    authorCell.textContent = book.author;
-    row.appendChild(authorCell);
-
-    const pagesCell = document.createElement("td");
-    pagesCell.textContent = book.pages;
-    row.appendChild(pagesCell);
-
-    const wasReadCell = document.createElement("td");
-    const changeBut = document.createElement("button");
-    changeBut.className = "btn btn-success";
-    changeBut.textContent = book.hasRead ? "Yes" : "No";
-    changeBut.dataset.index = i;
-    changeBut.addEventListener("click", function () {
-      const index = Number(this.dataset.index);
-      myLibrary[index].hasRead = !myLibrary[index].hasRead;
+    row.innerHTML = `
+      <td>${book.title}</td>
+      <td>${book.author}</td>
+      <td>${book.pages}</td>
+      <td></td>
+      <td></td>
+    `;
+
+    const readButton = document.createElement("button");
+    readButton.className = "btn btn-success";
+    readButton.textContent = book.hasRead ? "Yes" : "No";
+    readButton.addEventListener("click", () => {
+      book.hasRead = !book.hasRead;
       render();
     });
-    wasReadCell.appendChild(changeBut);
-    row.appendChild(wasReadCell);
-
-    //delete button
-    const deleteCell = document.createElement("td");
-    const delButton = document.createElement("button");
-    delButton.className = "btn btn-warning";
-    delButton.textContent = "Delete";
-    delButton.dataset.index = i;
-    delButton.addEventListener("click", function () {
-      const index = Number(this.dataset.index);
-      alert(`You've deleted title: ${myLibrary[index].title}`);
-      myLibrary.splice(index, 1);
+
+    row.children[3].appendChild(readButton);
+
+    const deleteButton = document.createElement("button");
+    deleteButton.className = "btn btn-warning";
+    deleteButton.textContent = "Delete";
+    deleteButton.addEventListener("click", () => {
+      alert(`You deleted: ${book.title}`);
+      myLibrary.splice(i, 1);
       render();
     });
-    deleteCell.appendChild(delButton);
-    row.appendChild(deleteCell);
+
+    row.children[4].appendChild(deleteButton);
 
     tbody.appendChild(row);
-  }
+  });
 }

From 22b841f1727e879a448244ffd958f9be369b8940 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 12:29:32 +0000
Subject: [PATCH 06/12] CSS styled for improved design and useability

---
 debugging/book-library/style.css | 122 ++++++++++++++++++++++++++++---
 1 file changed, 110 insertions(+), 12 deletions(-)

diff --git a/debugging/book-library/style.css b/debugging/book-library/style.css
index 302950cb..8c600c57 100644
--- a/debugging/book-library/style.css
+++ b/debugging/book-library/style.css
@@ -1,19 +1,117 @@
-.form-group {
-  width: 400px;
-  height: 300px;
-  align-self: left;
-  padding-left: 20px;
+/* Global styles */
+body {
+  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
+  background: #f7f7fb;
+  margin: 0;
+  padding: 20px;
 }
 
-.btn {
-  display: block;
+/* Header */
+.jumbotron {
+  background: linear-gradient(135deg, #3c8dbc, #5fa7d9);
+  color: white;
+  border-radius: 12px;
+  padding: 40px 20px;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
 }
 
-.form-check-label {
-  padding-left: 20px;
-  margin: 5px 0px 5px 0px;
+/* Main Button */
+button.btn-info {
+  background: #3c8dbc;
+  border: none;
+  padding: 10px 20px;
+  border-radius: 8px;
+  font-size: 16px;
+  transition: 0.2s;
 }
 
-button.btn-info {
-  margin: 20px;
+button.btn-info:hover {
+  background: #337aa5;
+  transform: translateY(-2px);
+}
+
+/* Form Collapse Panel */
+#demo {
+  background: white;
+  margin-top: 20px;
+  padding: 20px;
+  border-radius: 12px;
+  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
+}
+
+.form-group label {
+  margin-top: 10px;
+  font-weight: 600;
+}
+
+.form-control {
+  border-radius: 8px;
+  padding: 10px;
+}
+
+/* Submit Button */
+#submitBtn {
+  margin-top: 20px;
+  background: #28a745;
+  border: none;
+  padding: 10px 20px;
+  border-radius: 10px;
+  font-size: 16px;
+  transition: 0.2s;
+}
+
+#submitBtn:hover {
+  background: #218838;
+  transform: translateY(-2px);
+}
+
+/* Table */
+.table {
+  margin-top: 40px;
+  background: white;
+  border-radius: 12px;
+  overflow: hidden;
+  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
+}
+
+.thead-dark th {
+  background: #3c3f46;
+  color: white;
+  border: none;
+}
+
+/* Table Row Hover Effect */
+.table tbody tr {
+  transition: 0.2s;
+}
+
+.table tbody tr:hover {
+  background: #f0f4ff;
+}
+
+/* Buttons Inside Table */
+.btn-success,
+.btn-warning {
+  font-size: 14px;
+  padding: 6px 12px;
+  border-radius: 8px;
+  transition: 0.2s;
+}
+
+.btn-success:hover {
+  background: #1e7e34;
+  transform: scale(1.05);
+}
+
+.btn-warning:hover {
+  background: #d39e00;
+  transform: scale(1.05);
+}
+.read-yes {
+  background-color: #166629;
+  color: white;
 }
+.read-no {
+  background-color: #5c2329;
+  color: white;
+}
\ No newline at end of file

From 0a6dbc1a9ef739fa0517af1f6f4fe7f1d3c44fbf Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 12:29:48 +0000
Subject: [PATCH 07/12] Update read button styling to reflect book read status

---
 debugging/book-library/script.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 2456842d..b4310a4a 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -68,8 +68,13 @@ function render() {
     `;
 
     const readButton = document.createElement("button");
-    readButton.className = "btn btn-success";
-    readButton.textContent = book.hasRead ? "Yes" : "No";
+    if (book.hasRead) {
+      readButton.className = "btn btn-success";
+      readButton.textContent = "Yes";
+    } else {
+      readButton.className = "btn btn-danger";
+      readButton.textContent = "No";
+    }
     readButton.addEventListener("click", () => {
       book.hasRead = !book.hasRead;
       render();

From 97d1213355d14b8a60faa20cae88ad88814dc590 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 12:30:04 +0000
Subject: [PATCH 08/12] Update header title to 'My Book Library'

---
 debugging/book-library/index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 4dd8b782..f2bb4dcd 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -14,7 +14,7 @@
 
   <body>
     <div class="jumbotron text-center">
-      <h1>Library</h1>
+      <h1>My Book Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 

From 539d8c9569009d0d126e655feff64c13887c3e86 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 13:47:03 +0000
Subject: [PATCH 09/12] Refactor CSS comments for clarity and consistency

---
 debugging/book-library/style.css | 31 ++++++++++++-------------------
 1 file changed, 12 insertions(+), 19 deletions(-)

diff --git a/debugging/book-library/style.css b/debugging/book-library/style.css
index 8c600c57..db1096fc 100644
--- a/debugging/book-library/style.css
+++ b/debugging/book-library/style.css
@@ -1,4 +1,4 @@
-/* Global styles */
+/* Global Styles */
 body {
   font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   background: #f7f7fb;
@@ -6,7 +6,7 @@ body {
   padding: 20px;
 }
 
-/* Header */
+/* Header / Jumbotron */
 .jumbotron {
   background: linear-gradient(135deg, #3c8dbc, #5fa7d9);
   color: white;
@@ -15,22 +15,22 @@ body {
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
 }
 
-/* Main Button */
-button.btn-info {
+/* "Add New Book" Button */
+.btn-info {
   background: #3c8dbc;
   border: none;
   padding: 10px 20px;
   border-radius: 8px;
   font-size: 16px;
-  transition: 0.2s;
+  transition: 0.2s ease;
 }
 
-button.btn-info:hover {
+.btn-info:hover {
   background: #337aa5;
   transform: translateY(-2px);
 }
 
-/* Form Collapse Panel */
+/* Form Collapse Box */
 #demo {
   background: white;
   margin-top: 20px;
@@ -57,7 +57,7 @@ button.btn-info:hover {
   padding: 10px 20px;
   border-radius: 10px;
   font-size: 16px;
-  transition: 0.2s;
+  transition: 0.2s ease;
 }
 
 #submitBtn:hover {
@@ -74,13 +74,14 @@ button.btn-info:hover {
   box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
 }
 
+/* Table Header */
 .thead-dark th {
   background: #3c3f46;
   color: white;
   border: none;
 }
 
-/* Table Row Hover Effect */
+/* Row Hover */
 .table tbody tr {
   transition: 0.2s;
 }
@@ -89,13 +90,13 @@ button.btn-info:hover {
   background: #f0f4ff;
 }
 
-/* Buttons Inside Table */
+/* Buttons in Table */
 .btn-success,
 .btn-warning {
   font-size: 14px;
   padding: 6px 12px;
   border-radius: 8px;
-  transition: 0.2s;
+  transition: 0.2s ease;
 }
 
 .btn-success:hover {
@@ -107,11 +108,3 @@ button.btn-info:hover {
   background: #d39e00;
   transform: scale(1.05);
 }
-.read-yes {
-  background-color: #166629;
-  color: white;
-}
-.read-no {
-  background-color: #5c2329;
-  color: white;
-}
\ No newline at end of file

From 330610bf1bfdfe391cffad320f7c8439eb1081b5 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 13:48:15 +0000
Subject: [PATCH 10/12] general feedback applied to improve book management

---
 debugging/book-library/script.js | 102 +++++++++++++++++++------------
 1 file changed, 64 insertions(+), 38 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index b4310a4a..1965b30e 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,62 +1,85 @@
 let myLibrary = [];
+class Book {
+  constructor(title, author, pages, hasRead) {
+    this.title = title;
+    this.author = author;
+    this.pages = pages;
+    this.hasRead = Boolean(hasRead);
+  }
+}
 
-window.addEventListener("load", function () {
-  populateStorage();
-  render();
-  document.getElementById("submitBtn").addEventListener("click", submit);
+//  Initial Setup
+window.addEventListener("load", () => {
+  seedInitialBooks();
+  renderLibrary();
+  document.getElementById("submitBtn").addEventListener("click", handleSubmit);
 });
 
-function populateStorage() {
+// Add starter books if library is empty
+function seedInitialBooks() {
   if (myLibrary.length === 0) {
     myLibrary.push(new Book("Robinson Crusoe", "Daniel Defoe", 252, true));
     myLibrary.push(new Book("The Old Man and the Sea", "Ernest Hemingway", 127, true));
   }
 }
 
+//  Form Inputs
 const titleInput = document.getElementById("title");
 const authorInput = document.getElementById("author");
 const pagesInput = document.getElementById("pages");
 const readCheckBox = document.getElementById("check");
 
-function submit() {
+//  Form Submission
+function handleSubmit() {
   const titleVal = titleInput.value.trim();
   const authorVal = authorInput.value.trim();
   const pagesVal = pagesInput.value.trim();
 
-  if (!titleVal || !authorVal || !pagesVal) {
+  if (!validateInputs(titleVal, authorVal, pagesVal)) return;
+
+  const newBook = new Book(
+    titleVal,
+    authorVal,
+    Number(pagesVal),
+    readCheckBox.checked
+  );
+
+  myLibrary.push(newBook);
+  resetForm();
+  renderLibrary();
+}
+
+// Validate input values
+function validateInputs(title, author, pages) {
+  if (!title || !author || !pages) {
     alert("Please fill all fields!");
     return false;
   }
 
-  if (isNaN(Number(pagesVal)) || Number(pagesVal) <= 0) {
+  const pagesNum = Number(pages);
+
+  if (isNaN(pagesNum) || pagesNum <= 0) {
     alert("Please enter a valid number of pages!");
     return false;
   }
 
-  const book = new Book(titleVal, authorVal, Number(pagesVal), readCheckBox.checked);
-  myLibrary.push(book);
+  return true;
+}
 
+// Clear form after successful submission
+function resetForm() {
   titleInput.value = "";
   authorInput.value = "";
   pagesInput.value = "";
   readCheckBox.checked = false;
-
-  render();
-  return true;
-}
-
-function Book(title, author, pages, hasRead) {
-  this.title = title;
-  this.author = author;
-  this.pages = pages;
-  this.hasRead = Boolean(hasRead);
 }
 
-function render() {
+//  Rendering
+function renderLibrary() {
   const tbody = document.querySelector("#display tbody");
   tbody.innerHTML = "";
 
-  myLibrary.forEach((book, i) => {
+  myLibrary.forEach((book, index) => {
     const row = document.createElement("tr");
 
     row.innerHTML = `
@@ -67,32 +90,35 @@ function render() {
       <td></td>
     `;
 
+    //  Read Button
     const readButton = document.createElement("button");
-    if (book.hasRead) {
-      readButton.className = "btn btn-success";
-      readButton.textContent = "Yes";
-    } else {
-      readButton.className = "btn btn-danger";
-      readButton.textContent = "No";
-    }
-    readButton.addEventListener("click", () => {
-      book.hasRead = !book.hasRead;
-      render();
-    });
+    readButton.textContent = book.hasRead ? "Yes" : "No";
+    readButton.className = book.hasRead ? "btn btn-success" : "btn btn-danger";
+    readButton.addEventListener("click", () => toggleReadStatus(index));
 
     row.children[3].appendChild(readButton);
 
+    //  Delete Button
     const deleteButton = document.createElement("button");
     deleteButton.className = "btn btn-warning";
     deleteButton.textContent = "Delete";
-    deleteButton.addEventListener("click", () => {
-      alert(`You deleted: ${book.title}`);
-      myLibrary.splice(i, 1);
-      render();
-    });
+    deleteButton.addEventListener("click", () => deleteBook(index));
 
     row.children[4].appendChild(deleteButton);
 
     tbody.appendChild(row);
   });
 }
+
+// Toggle read/unread status
+function toggleReadStatus(index) {
+  myLibrary[index].hasRead = !myLibrary[index].hasRead;
+  renderLibrary();
+}
+
+// Delete a book from the library
+function deleteBook(index) {
+  alert(`You deleted: ${myLibrary[index].title}`);
+  myLibrary.splice(index, 1);
+  renderLibrary();
+}

From 385e9d058e91b7eb4f03ded38f3503bd101adb1c Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Fri, 12 Dec 2025 13:48:52 +0000
Subject: [PATCH 11/12] general feedback applied to improve html structure

---
 debugging/book-library/index.html | 67 +++++++++++++++++--------------
 1 file changed, 37 insertions(+), 30 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index f2bb4dcd..b1758ec3 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,8 +1,9 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title>Library</title>
-    <meta charset="utf-8" name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Book Library</title>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 
     <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>
@@ -18,42 +19,48 @@ <h1>My Book Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 
-    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
-      Add new book
-    </button>
+    <div class="container">
 
-    <div id="demo" class="collapse">
-      <div class="form-group">
-        <label for="title">Title:</label>
-        <input type="text" class="form-control" id="title" name="title" required />
+      <button data-toggle="collapse" data-target="#demo" class="btn btn-info mb-3">
+        Add new book
+      </button>
 
-        <label for="author">Author: </label>
-        <input type="text" class="form-control" id="author" name="author" required />
+      <div id="demo" class="collapse mb-4">
+        <div class="form-group">
 
-        <label for="pages">Pages:</label>
-        <input type="number" class="form-control" id="pages" name="pages" required />
+          <label for="title">Title:</label>
+          <input type="text" class="form-control" id="title" placeholder="Enter book title" required />
 
-        <label class="form-check-label mt-2">
-          <input type="checkbox" class="form-check-input" id="check" /> Read
-        </label>
+          <label for="author" class="mt-2">Author:</label>
+          <input type="text" class="form-control" id="author" placeholder="Enter the author" required />
 
-        <button type="button" class="btn btn-primary mt-3" id="submitBtn">Submit</button>
+          <label for="pages" class="mt-2">Pages:</label>
+          <input type="number" class="form-control" id="pages" placeholder="e.g. 350" required />
+
+          <label class="form-check-label mt-2">
+            <input type="checkbox" class="form-check-input" id="check" /> Read
+          </label>
+
+          <button type="button" class="btn btn-primary mt-3" id="submitBtn">Submit</button>
+        </div>
       </div>
-    </div>
 
-    <table class="table" id="display">
-      <thead class="thead-dark">
-        <tr>
-          <th>Title</th>
-          <th>Author</th>
-          <th>Number of Pages</th>
-          <th>Read</th>
-          <th></th>
-        </tr>
-      </thead>
-      <tbody></tbody>
-    </table>
+      <table class="table" id="display">
+        <thead class="thead-dark">
+          <tr>
+            <th>Title</th>
+            <th>Author</th>
+            <th>Number of Pages</th>
+            <th>Read</th>
+            <th></th>
+          </tr>
+        </thead>
+        <tbody></tbody>
+      </table>
+
+    </div>
 
+    <!-- JS File -->
     <script src="script.js"></script>
   </body>
 </html>

From 921f47a6d5c4fe9e6cd7df242bdf0e0331de7620 Mon Sep 17 00:00:00 2001
From: zilinskyte <zilinskyterogers@gmail.com>
Date: Mon, 15 Dec 2025 02:10:45 +0000
Subject: [PATCH 12/12] feedback addressed

---
 debugging/book-library/script.js | 37 +++++++++++++++++++++-----------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 1965b30e..77e28fa2 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -58,7 +58,7 @@ function validateInputs(title, author, pages) {
 
   const pagesNum = Number(pages);
 
-  if (isNaN(pagesNum) || pagesNum <= 0) {
+  if (!Number.isInteger(pagesNum) || pagesNum <= 0) {
     alert("Please enter a valid number of pages!");
     return false;
   }
@@ -82,13 +82,23 @@ function renderLibrary() {
   myLibrary.forEach((book, index) => {
     const row = document.createElement("tr");
 
-    row.innerHTML = `
-      <td>${book.title}</td>
-      <td>${book.author}</td>
-      <td>${book.pages}</td>
-      <td></td>
-      <td></td>
-    `;
+    const titleCell = document.createElement("td");
+    titleCell.textContent = book.title;
+    row.appendChild(titleCell);
+
+    const authorCell = document.createElement("td");
+    authorCell.textContent = book.author;
+    row.appendChild(authorCell);
+
+    const pagesCell = document.createElement("td");
+    pagesCell.textContent = book.pages;
+    row.appendChild(pagesCell);
+
+    const readCell = document.createElement("td");
+    row.appendChild(readCell);
+
+    const deleteCell = document.createElement("td");
+    row.appendChild(deleteCell);
 
     //  Read Button
     const readButton = document.createElement("button");
@@ -118,7 +128,10 @@ function toggleReadStatus(index) {
 
 // Delete a book from the library
 function deleteBook(index) {
-  alert(`You deleted: ${myLibrary[index].title}`);
-  myLibrary.splice(index, 1);
-  renderLibrary();
-}
+const confirmed = confirm( `Are you sure you want to delete "${myLibrary[index].title}"?` );
+if (!confirmed) return;
+const deletedBook  = myLibrary[index].title;
+myLibrary.splice(index, 1);
+renderLibrary();
+alert(`"${deletedBook}" has been deleted from your library.`);
+}
\ No newline at end of file