From 97c6d21382504027e2dfa5899f261a801c29f54b Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Thu, 20 Aug 2026 10:30:32 +0100
Subject: [PATCH 01/10] book lilbrary fix bug

---
 debugging/book-library/script.js | 121 +++++++++++++++++--------------
 1 file changed, 67 insertions(+), 54 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d3..5c4acccf5 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,22 +1,18 @@
 let myLibrary = [];
 
-window.addEventListener("load", function (e) {
+window.addEventListener("load", function () {
   populateStorage();
   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
+    // Initialize sample data with two books
+    myLibrary.push(new Book("Robinson Crusoe", "Daniel Defoe", "252", true));
+
+    myLibrary.push(
+      new Book("The Old Man and the Sea", "Ernest Hemingway", "127", true)
     );
-    myLibrary.push(book1);
-    myLibrary.push(book2);
-    render();
   }
 }
 
@@ -25,22 +21,42 @@ 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 == ""
-  ) {
+  // remove empty spaces before and after author and title input
+  title.value = title.value.trim();
+  author.value = author.value.trim();
+
+  // Check for empty input fields
+  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);
-    render();
+    return;
+  }
+
+  // check if page number is a valid integer > 0
+  if (isNaN(pages) || pages <= 0 || !Number.isInteger(pages)) {
+    alert("number of pages need to be a valid integer >0!");
+    return;
   }
+
+  // Create a new book object with input data
+  const newBook = new Book(
+    title.value,
+    author.value,
+    pages.value,
+    check.checked
+  );
+
+  // Add the new book to the library
+  myLibrary.push(newBook);
+
+  // Update the display
+  render();
+
+  // Clear the form
+  title.value = "";
+  author.value = "";
+  pages.value = "";
+  check.checked = false;
 }
 
 function Book(title, author, pages, check) {
@@ -53,51 +69,48 @@ 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-- {
+
+  // Remove existing rows except header
+  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
+
+  for (let i = 0; i < myLibrary.length; i++) {
+    let row = table.insertRow();
+
+    // Insert cells
+    row.insertCell().innerText = myLibrary[i].title;
+    row.insertCell().innerText = myLibrary[i].author;
+    row.insertCell().innerText = myLibrary[i].pages;
+
+    // Read/Unread button
+    let readCell = row.insertCell();
+
     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.innerText = myLibrary[i].check ? "Yes" : "No";
 
     changeBut.addEventListener("click", function () {
       myLibrary[i].check = !myLibrary[i].check;
       render();
     });
 
-    //add delete button to every row and render again
-    let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    deleteCell.appendChild(delBut);
+    readCell.appendChild(changeBut);
+
+    // Delete button
+    let deleteCell = row.insertCell();
+
+    let delBut = document.createElement("button");
     delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    delBut.innerText = "Delete";
+
+    delBut.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
+
       myLibrary.splice(i, 1);
       render();
     });
+
+    deleteCell.appendChild(delBut);
   }
 }

From 16fa2645ef267ec85fb41b989e25a23701bfa4a2 Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Thu, 20 Aug 2026 11:23:56 +0100
Subject: [PATCH 02/10] book library debugging

---
 debugging/book-library/index.html | 62 ++++++++++++++++++-------------
 1 file changed, 37 insertions(+), 25 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa71e..e3324922b 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,19 +1,23 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
-    <title> </title>
+    <meta charset="utf-8" />
     <meta
-      charset="utf-8"
       name="viewport"
       content="width=device-width, initial-scale=1.0"
     />
+
+    <title>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" />
   </head>
 
@@ -23,7 +27,12 @@ <h1>Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 
-    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
+    <button
+      data-toggle="collapse"
+      data-target="#demo"
+      class="btn btn-info"
+      type="button"
+    >
       Add new book
     </button>
 
@@ -31,38 +40,46 @@ <h1>Library</h1>
       <div 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">Author:</label>
         <input
-          type="author"
+          type="text"
           class="form-control"
           id="author"
           name="author"
           required
         />
+
         <label for="pages">Pages:</label>
         <input
           type="number"
           class="form-control"
-          id="pages"
+          id="pages" 
+          min="1"
+          step="1"
           name="pages"
           required
         />
-        <label class="form-check-label">
-          <input
-            type="checkbox"
-            class="form-check-input"
-            id="check"
-            value=""
-          />Read
-        </label>
+
+        <div class="form-check">
+          <label class="form-check-label">
+            <input
+              type="checkbox"
+              class="form-check-input"
+              id="check"
+            />
+            Read
+          </label>
+        </div>
+
         <input
-          type="submit"
+          type="button"
           value="Submit"
           class="btn btn-primary"
           onclick="submit();"
@@ -80,17 +97,12 @@ <h1>Library</h1>
           <th></th>
         </tr>
       </thead>
+
       <tbody>
-        <tr>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-        </tr>
+        <!-- JavaScript adds book rows here -->
       </tbody>
     </table>
 
     <script src="script.js"></script>
   </body>
-</html>
+</html>
\ No newline at end of file

From 30137019426bbe65e062c09479fa33818333ebfc Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Thu, 20 Aug 2026 11:31:46 +0100
Subject: [PATCH 03/10] fix changes

---
 debugging/book-library/index.html | 62 +++++++++++++------------------
 1 file changed, 25 insertions(+), 37 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index e3324922b..23acfa71e 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,23 +1,19 @@
 <!DOCTYPE html>
-<html lang="en">
+<html>
   <head>
-    <meta charset="utf-8" />
+    <title> </title>
     <meta
+      charset="utf-8"
       name="viewport"
       content="width=device-width, initial-scale=1.0"
     />
-
-    <title>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" />
   </head>
 
@@ -27,12 +23,7 @@ <h1>Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 
-    <button
-      data-toggle="collapse"
-      data-target="#demo"
-      class="btn btn-info"
-      type="button"
-    >
+    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
       Add new book
     </button>
 
@@ -40,46 +31,38 @@ <h1>Library</h1>
       <div class="form-group">
         <label for="title">Title:</label>
         <input
-          type="text"
+          type="title"
           class="form-control"
           id="title"
           name="title"
           required
         />
-
-        <label for="author">Author:</label>
+        <label for="author">Author: </label>
         <input
-          type="text"
+          type="author"
           class="form-control"
           id="author"
           name="author"
           required
         />
-
         <label for="pages">Pages:</label>
         <input
           type="number"
           class="form-control"
-          id="pages" 
-          min="1"
-          step="1"
+          id="pages"
           name="pages"
           required
         />
-
-        <div class="form-check">
-          <label class="form-check-label">
-            <input
-              type="checkbox"
-              class="form-check-input"
-              id="check"
-            />
-            Read
-          </label>
-        </div>
-
+        <label class="form-check-label">
+          <input
+            type="checkbox"
+            class="form-check-input"
+            id="check"
+            value=""
+          />Read
+        </label>
         <input
-          type="button"
+          type="submit"
           value="Submit"
           class="btn btn-primary"
           onclick="submit();"
@@ -97,12 +80,17 @@ <h1>Library</h1>
           <th></th>
         </tr>
       </thead>
-
       <tbody>
-        <!-- JavaScript adds book rows here -->
+        <tr>
+          <td></td>
+          <td></td>
+          <td></td>
+          <td></td>
+          <td></td>
+        </tr>
       </tbody>
     </table>
 
     <script src="script.js"></script>
   </body>
-</html>
\ No newline at end of file
+</html>

From 597ab64cb41e0c89ce59410644cde8d6253b649c Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Thu, 20 Aug 2026 15:08:51 +0100
Subject: [PATCH 04/10] adding file

---
 debugging/book-library/script.js | 121 ++++++++++++++-----------------
 1 file changed, 54 insertions(+), 67 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 5c4acccf5..75ce6c1d3 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,18 +1,22 @@
 let myLibrary = [];
 
-window.addEventListener("load", function () {
+window.addEventListener("load", function (e) {
   populateStorage();
   render();
 });
 
 function populateStorage() {
   if (myLibrary.length == 0) {
-    // Initialize sample data with two books
-    myLibrary.push(new Book("Robinson Crusoe", "Daniel Defoe", "252", true));
-
-    myLibrary.push(
-      new Book("The Old Man and the Sea", "Ernest Hemingway", "127", true)
+    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();
   }
 }
 
@@ -21,42 +25,22 @@ 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() {
-  // remove empty spaces before and after author and title input
-  title.value = title.value.trim();
-  author.value = author.value.trim();
-
-  // Check for empty input fields
-  if (!title.value || !author.value || !pages.value) {
+  if (
+    title.value == null ||
+    title.value == "" ||
+    pages.value == null ||
+    pages.value == ""
+  ) {
     alert("Please fill all fields!");
-    return;
-  }
-
-  // check if page number is a valid integer > 0
-  if (isNaN(pages) || pages <= 0 || !Number.isInteger(pages)) {
-    alert("number of pages need to be a valid integer >0!");
-    return;
+    return false;
+  } else {
+    let book = new Book(title.value, title.value, pages.value, check.checked);
+    library.push(book);
+    render();
   }
-
-  // Create a new book object with input data
-  const newBook = new Book(
-    title.value,
-    author.value,
-    pages.value,
-    check.checked
-  );
-
-  // Add the new book to the library
-  myLibrary.push(newBook);
-
-  // Update the display
-  render();
-
-  // Clear the form
-  title.value = "";
-  author.value = "";
-  pages.value = "";
-  check.checked = false;
 }
 
 function Book(title, author, pages, check) {
@@ -69,48 +53,51 @@ function Book(title, author, pages, check) {
 function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;
-
-  // Remove existing rows except header
-  for (let n = rowsNumber - 1; n > 0; n--) {
+  //delete old table
+  for (let n = rowsNumber - 1; n > 0; n-- {
     table.deleteRow(n);
   }
-
-  for (let i = 0; i < myLibrary.length; i++) {
-    let row = table.insertRow();
-
-    // Insert cells
-    row.insertCell().innerText = myLibrary[i].title;
-    row.insertCell().innerText = myLibrary[i].author;
-    row.insertCell().innerText = myLibrary[i].pages;
-
-    // Read/Unread button
-    let readCell = row.insertCell();
-
+  //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";
-    changeBut.innerText = myLibrary[i].check ? "Yes" : "No";
+    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;
       render();
     });
 
-    readCell.appendChild(changeBut);
-
-    // Delete button
-    let deleteCell = row.insertCell();
-
-    let delBut = document.createElement("button");
+    //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.innerText = "Delete";
-
-    delBut.addEventListener("click", function () {
+    delBut.innerHTML = "Delete";
+    delBut.addEventListener("clicks", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
-
       myLibrary.splice(i, 1);
       render();
     });
-
-    deleteCell.appendChild(delBut);
   }
 }

From 291e3468e040e605af8746a78ab664f401b9036c Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Thu, 20 Aug 2026 18:11:03 +0100
Subject: [PATCH 05/10] adding relevant files

---
 debugging/book-library/script.js | 121 +++++++++++++++++--------------
 1 file changed, 67 insertions(+), 54 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d3..5c4acccf5 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,22 +1,18 @@
 let myLibrary = [];
 
-window.addEventListener("load", function (e) {
+window.addEventListener("load", function () {
   populateStorage();
   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
+    // Initialize sample data with two books
+    myLibrary.push(new Book("Robinson Crusoe", "Daniel Defoe", "252", true));
+
+    myLibrary.push(
+      new Book("The Old Man and the Sea", "Ernest Hemingway", "127", true)
     );
-    myLibrary.push(book1);
-    myLibrary.push(book2);
-    render();
   }
 }
 
@@ -25,22 +21,42 @@ 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 == ""
-  ) {
+  // remove empty spaces before and after author and title input
+  title.value = title.value.trim();
+  author.value = author.value.trim();
+
+  // Check for empty input fields
+  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);
-    render();
+    return;
+  }
+
+  // check if page number is a valid integer > 0
+  if (isNaN(pages) || pages <= 0 || !Number.isInteger(pages)) {
+    alert("number of pages need to be a valid integer >0!");
+    return;
   }
+
+  // Create a new book object with input data
+  const newBook = new Book(
+    title.value,
+    author.value,
+    pages.value,
+    check.checked
+  );
+
+  // Add the new book to the library
+  myLibrary.push(newBook);
+
+  // Update the display
+  render();
+
+  // Clear the form
+  title.value = "";
+  author.value = "";
+  pages.value = "";
+  check.checked = false;
 }
 
 function Book(title, author, pages, check) {
@@ -53,51 +69,48 @@ 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-- {
+
+  // Remove existing rows except header
+  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
+
+  for (let i = 0; i < myLibrary.length; i++) {
+    let row = table.insertRow();
+
+    // Insert cells
+    row.insertCell().innerText = myLibrary[i].title;
+    row.insertCell().innerText = myLibrary[i].author;
+    row.insertCell().innerText = myLibrary[i].pages;
+
+    // Read/Unread button
+    let readCell = row.insertCell();
+
     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.innerText = myLibrary[i].check ? "Yes" : "No";
 
     changeBut.addEventListener("click", function () {
       myLibrary[i].check = !myLibrary[i].check;
       render();
     });
 
-    //add delete button to every row and render again
-    let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    deleteCell.appendChild(delBut);
+    readCell.appendChild(changeBut);
+
+    // Delete button
+    let deleteCell = row.insertCell();
+
+    let delBut = document.createElement("button");
     delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    delBut.innerText = "Delete";
+
+    delBut.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
+
       myLibrary.splice(i, 1);
       render();
     });
+
+    deleteCell.appendChild(delBut);
   }
 }

From 8bf9a93f701c05266fad4830436f5a2c48e84c95 Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Thu, 20 Aug 2026 18:30:08 +0100
Subject: [PATCH 06/10] adding files

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

diff --git a/debugging/book-library/style.css b/debugging/book-library/style.css
index 302950cb8..9c0ecd9c4 100644
--- a/debugging/book-library/style.css
+++ b/debugging/book-library/style.css
@@ -15,5 +15,5 @@
 }
 
 button.btn-info {
-  margin: 20px;
+  margin: 30px;
 }

From 269f218b1d42dc7171ba111e70e8f2bc1f09c154 Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Thu, 20 Aug 2026 18:30:40 +0100
Subject: [PATCH 07/10] adding title to html

---
 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 23acfa71e..4c3a9475a 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title> </title>
+    <title>The Book library</title>
     <meta
       charset="utf-8"
       name="viewport"

From e68637051d687a55813d579fd0a134b1dd19db56 Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Fri, 21 Aug 2026 12:23:12 +0100
Subject: [PATCH 08/10] fixing validation issue

---
 debugging/book-library/index.html | 38 ++++++++++++++++++++++++-------
 debugging/book-library/script.js  |  6 +++--
 2 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 4c3a9475a..6f1b46c7a 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,19 +1,23 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title>The Book library</title>
+    <title>The Book 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" />
   </head>
 
@@ -23,50 +27,67 @@ <h1>Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 
-    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
+    <button
+      data-toggle="collapse"
+      data-target="#demo"
+      class="btn btn-info"
+    >
       Add new book
     </button>
 
     <div id="demo" class="collapse">
       <div class="form-group">
+
+        <!-- Title -->
         <label for="title">Title:</label>
         <input
-          type="title"
+          type="text"
           class="form-control"
           id="title"
           name="title"
           required
         />
-        <label for="author">Author: </label>
+
+        <!-- Author -->
+        <label for="author">Author:</label>
         <input
-          type="author"
+          type="text"
           class="form-control"
           id="author"
           name="author"
           required
         />
+
+        <!-- Pages -->
         <label for="pages">Pages:</label>
         <input
           type="number"
           class="form-control"
           id="pages"
           name="pages"
+          min="1"
+          step="1"
           required
         />
+
+        <!-- Read -->
         <label class="form-check-label">
           <input
             type="checkbox"
             class="form-check-input"
             id="check"
-            value=""
-          />Read
+          />
+          Read
         </label>
+
+        <!-- Submit -->
         <input
           type="submit"
           value="Submit"
           class="btn btn-primary"
           onclick="submit();"
         />
+
       </div>
     </div>
 
@@ -80,6 +101,7 @@ <h1>Library</h1>
           <th></th>
         </tr>
       </thead>
+
       <tbody>
         <tr>
           <td></td>
@@ -93,4 +115,4 @@ <h1>Library</h1>
 
     <script src="script.js"></script>
   </body>
-</html>
+</html>
\ No newline at end of file
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 5c4acccf5..01587e8e4 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -33,8 +33,10 @@ function submit() {
   }
 
   // check if page number is a valid integer > 0
-  if (isNaN(pages) || pages <= 0 || !Number.isInteger(pages)) {
-    alert("number of pages need to be a valid integer >0!");
+  const pageNumber = Number(pages.value);
+
+  if (!Number.isInteger(pageNumber) || pageNumber <= 0) {
+    alert("Number of pages needs to be a valid integer greater than 0!");
     return;
   }
 

From 10d0aba2f3c17ad204ec8cb203fa0bdce628352e Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Fri, 21 Aug 2026 15:25:42 +0100
Subject: [PATCH 09/10] response to feedback

---
 debugging/book-library/index.html | 109 ++++++++++++++----------------
 1 file changed, 50 insertions(+), 59 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 6f1b46c7a..003044e21 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!doctype html>
 <html>
   <head>
     <title>The Book Library</title>
@@ -31,64 +31,63 @@ <h1>Library</h1>
       data-toggle="collapse"
       data-target="#demo"
       class="btn btn-info"
+      type="button"
     >
       Add new book
     </button>
 
     <div id="demo" class="collapse">
-      <div class="form-group">
-
-        <!-- Title -->
-        <label for="title">Title:</label>
-        <input
-          type="text"
-          class="form-control"
-          id="title"
-          name="title"
-          required
-        />
-
-        <!-- Author -->
-        <label for="author">Author:</label>
-        <input
-          type="text"
-          class="form-control"
-          id="author"
-          name="author"
-          required
-        />
-
-        <!-- Pages -->
-        <label for="pages">Pages:</label>
-        <input
-          type="number"
-          class="form-control"
-          id="pages"
-          name="pages"
-          min="1"
-          step="1"
-          required
-        />
+      <form id="form">
+        <div class="form-group">
+          <!-- Title -->
+          <label for="title">Title:</label>
+          <input
+            type="text"
+            class="form-control"
+            id="title"
+            name="title"
+            required
+          />
 
-        <!-- Read -->
-        <label class="form-check-label">
+          <!-- Author -->
+          <label for="author">Author:</label>
           <input
-            type="checkbox"
-            class="form-check-input"
-            id="check"
+            type="text"
+            class="form-control"
+            id="author"
+            name="author"
+            required
           />
-          Read
-        </label>
 
-        <!-- Submit -->
-        <input
-          type="submit"
-          value="Submit"
-          class="btn btn-primary"
-          onclick="submit();"
-        />
+          <!-- Pages -->
+          <label for="pages">Pages:</label>
+          <input
+            type="number"
+            class="form-control"
+            id="pages"
+            name="pages"
+            min="1"
+            step="1"
+            required
+          />
 
-      </div>
+          <!-- Read -->
+          <div class="form-check">
+            <label class="form-check-label">
+              <input
+                type="checkbox"
+                class="form-check-input"
+                id="check"
+                name="read"
+              />
+              Read
+            </label>
+          </div>
+
+          <!-- Submit -->
+          <button type="submit" class="btn btn-primary">Submit</button>
+        </div>
+      </form>
     </div>
 
     <table class="table" id="display">
@@ -102,17 +101,9 @@ <h1>Library</h1>
         </tr>
       </thead>
 
-      <tbody>
-        <tr>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-        </tr>
-      </tbody>
+      <tbody id="book-list"></tbody>
     </table>
 
     <script src="script.js"></script>
   </body>
-</html>
\ No newline at end of file
+</html>

From 030e4f91840cbdc4df9ab4cfde7c716ae6503eda Mon Sep 17 00:00:00 2001
From: mandip sanger <mandipsanger1@gmail.com>
Date: Fri, 21 Aug 2026 17:28:45 +0100
Subject: [PATCH 10/10] changes

---
 debugging/book-library/script.js | 93 +++++++++++++++++++-------------
 1 file changed, 57 insertions(+), 36 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 01587e8e4..ff871549f 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,64 +1,79 @@
-let myLibrary = [];
+const myLibrary = [];
+
+const titleInput = document.getElementById("title");
+const authorInput = document.getElementById("author");
+const pagesInput = document.getElementById("pages");
+const readInput = document.getElementById("check");
+const form = document.getElementById("form");
 
 window.addEventListener("load", function () {
   populateStorage();
   render();
+
+  if (form) {
+    form.addEventListener("submit", function (event) {
+      event.preventDefault();
+      submit();
+    });
+  }
 });
 
 function populateStorage() {
-  if (myLibrary.length == 0) {
+  if (myLibrary.length === 0) {
     // Initialize sample data with two books
-    myLibrary.push(new Book("Robinson Crusoe", "Daniel Defoe", "252", true));
+    myLibrary.push(new Book("Robinson Crusoe", "Daniel Defoe", 252, true));
 
     myLibrary.push(
-      new Book("The Old Man and the Sea", "Ernest Hemingway", "127", 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");
-
 function submit() {
-  // remove empty spaces before and after author and title input
-  title.value = title.value.trim();
-  author.value = author.value.trim();
+  // Get cleaned input values
+  const titleValue = titleInput.value.trim();
+  const authorValue = authorInput.value.trim();
+  const pagesValue = pagesInput.value.trim();
 
   // Check for empty input fields
-  if (!title.value || !author.value || !pages.value) {
+  if (!titleValue || !authorValue || !pagesValue) {
     alert("Please fill all fields!");
     return;
   }
 
-  // check if page number is a valid integer > 0
-  const pageNumber = Number(pages.value);
+  // Make sure pages contains digits only
+  if (!/^\d+$/.test(pagesValue)) {
+    alert("Number of pages needs to be a valid integer greater than 0!");
+    return;
+  }
+
+  // Convert pages to a number
+  const pageNumber = Number(pagesValue);
 
-  if (!Number.isInteger(pageNumber) || pageNumber <= 0) {
+  // Check that pages is greater than zero
+  if (pageNumber <= 0) {
     alert("Number of pages needs to be a valid integer greater than 0!");
     return;
   }
 
-  // Create a new book object with input data
+  // Create a new book using cleaned and validated values
   const newBook = new Book(
-    title.value,
-    author.value,
-    pages.value,
-    check.checked
+    titleValue,
+    authorValue,
+    pageNumber,
+    readInput.checked
   );
 
-  // Add the new book to the library
+  // Add the new book
   myLibrary.push(newBook);
 
   // Update the display
   render();
 
-  // Clear the form
-  title.value = "";
-  author.value = "";
-  pages.value = "";
-  check.checked = false;
+  // Reset the entire form
+  if (form) {
+    form.reset();
+  }
 }
 
 function Book(title, author, pages, check) {
@@ -69,8 +84,8 @@ function Book(title, author, pages, check) {
 }
 
 function render() {
-  let table = document.getElementById("display");
-  let rowsNumber = table.rows.length;
+  const table = document.getElementById("display");
+  const rowsNumber = table.rows.length;
 
   // Remove existing rows except header
   for (let n = rowsNumber - 1; n > 0; n--) {
@@ -78,17 +93,17 @@ function render() {
   }
 
   for (let i = 0; i < myLibrary.length; i++) {
-    let row = table.insertRow();
+    const row = table.insertRow();
 
-    // Insert cells
+    // Insert book information
     row.insertCell().innerText = myLibrary[i].title;
     row.insertCell().innerText = myLibrary[i].author;
     row.insertCell().innerText = myLibrary[i].pages;
 
     // Read/Unread button
-    let readCell = row.insertCell();
+    const readCell = row.insertCell();
 
-    let changeBut = document.createElement("button");
+    const changeBut = document.createElement("button");
     changeBut.className = "btn btn-success";
     changeBut.innerText = myLibrary[i].check ? "Yes" : "No";
 
@@ -100,17 +115,23 @@ function render() {
     readCell.appendChild(changeBut);
 
     // Delete button
-    let deleteCell = row.insertCell();
+    const deleteCell = row.insertCell();
 
-    let delBut = document.createElement("button");
+    const delBut = document.createElement("button");
     delBut.className = "btn btn-warning";
     delBut.innerText = "Delete";
 
     delBut.addEventListener("click", function () {
-      alert(`You've deleted title: ${myLibrary[i].title}`);
+      const deletedTitle = myLibrary[i].title;
 
+      // Delete the book first
       myLibrary.splice(i, 1);
+
+      // Update the display
       render();
+
+      // Show confirmation after deletion
+      alert(`You've deleted title: ${deletedTitle}`);
     });
 
     deleteCell.appendChild(delBut);