From 0845e85d1216cac2252aea761e1f5eabe57b4ea8 Mon Sep 17 00:00:00 2001
From: JenniferIsidienu <jennieisidienu@gmail.com>
Date: Tue, 19 Aug 2025 18:47:48 +0100
Subject: [PATCH 1/5] book-library-1

---
 debugging/book-library/script.js | 30 ++++++++++++------------------
 1 file changed, 12 insertions(+), 18 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d..4d77aacd 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,21 +1,22 @@
 let myLibrary = [];
 
-window.addEventListener("load", function (e) {
+function Book(title, author, pages, check) {
+  this.title = title;
+  this.author = author;
+  this.pages = pages;
+  this.check = check;
+}
+
+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
-    );
-    myLibrary.push(book1);
-    myLibrary.push(book2);
+  if (myLibrary.length === 0) {
+    let book1 = new Book("Robinson Crusoe", "Daniel Defoe", "252", true);
+    let book2 = new Book("The Old Man and the Sea", "Ernest Hemingway", "127", true);
+    myLibrary.push(book1, book2);
     render();
   }
 }
@@ -43,13 +44,6 @@ function submit() {
   }
 }
 
-function Book(title, author, pages, check) {
-  this.title = title;
-  this.author = author;
-  this.pages = pages;
-  this.check = check;
-}
-
 function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;

From 0f1bfc90f41b1981933d2820be2d35618df70fac Mon Sep 17 00:00:00 2001
From: JenniferIsidienu <jennieisidienu@gmail.com>
Date: Tue, 19 Aug 2025 20:06:19 +0100
Subject: [PATCH 2/5] Book-Library-2

---
 debugging/book-library/script.js | 84 ++++++++++++++------------------
 1 file changed, 37 insertions(+), 47 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 4d77aacd..e6b83ec2 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -26,72 +26,62 @@ 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 == ""
+    title.value.trim() === "" ||
+    author.value.trim() === "" ||
+    pages.value.trim() === ""
   ) {
     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);
     render();
+
+    // Clear form
+    title.value = "";
+    author.value = "";
+    pages.value = "";
+    check.checked = false;
   }
 }
 
 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);
+
+  // Clear all rows except the header
+  for (let i = table.rows.length - 1; i > 0; i--) {
+    table.deleteRow(i);
   }
-  //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;
+  myLibrary.forEach((book, i) => {
+    let row = table.insertRow(-1);
+    row.insertCell(0).innerText = book.title;
+    row.insertCell(1).innerText = book.author;
+    row.insertCell(2).innerText = book.pages;
 
-    changeBut.addEventListener("click", function () {
-      myLibrary[i].check = !myLibrary[i].check;
+    // Read status toggle button
+    let readCell = row.insertCell(3);
+    let readBtn = document.createElement("button");
+    readBtn.innerText = book.check ? "Yes" : "No";
+    readBtn.className = "btn btn-success";
+    readBtn.addEventListener("click", function () {
+      book.check = !book.check;
       render();
     });
+    readCell.appendChild(readBtn);
 
-    //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}`);
+    // Delete button
+    let deleteCell = row.insertCell(4);
+    let deleteBtn = document.createElement("button");
+    deleteBtn.innerText = "Delete";
+    deleteBtn.className = "btn btn-warning";
+    deleteBtn.addEventListener("click", function () {
+      alert(`You've deleted title: ${book.title}`);
       myLibrary.splice(i, 1);
       render();
     });
-  }
+    deleteCell.appendChild(deleteBtn);
+  });
 }

From 1edd20377066cc1f7534305209174f09d3ac7e03 Mon Sep 17 00:00:00 2001
From: JenniferIsidienu <jennieisidienu@gmail.com>
Date: Tue, 19 Aug 2025 20:08:18 +0100
Subject: [PATCH 3/5] html-book-library

---
 debugging/book-library/index.html | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa71..544f4b37 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,7 +1,8 @@
 <!DOCTYPE html>
 <html>
+  <html lang="en">
   <head>
-    <title> </title>
+    <title>Book Library</title>
     <meta
       charset="utf-8"
       name="viewport"

From 524d27c347b4c439f4745e4f38d3ce7dbaca6467 Mon Sep 17 00:00:00 2001
From: JenniferIsidienu <jennieisidienu@gmail.com>
Date: Wed, 20 Aug 2025 11:29:16 +0100
Subject: [PATCH 4/5] html-corrected

---
 debugging/book-library/index.html | 143 +++++++++++-------------------
 1 file changed, 54 insertions(+), 89 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 544f4b37..6293e6f8 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,97 +1,62 @@
 <!DOCTYPE html>
-<html>
-  <html lang="en">
-  <head>
-    <title>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>
+<html lang="en">
+<head>
+  <title>Book Library</title>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 
-  <body>
-    <div class="jumbotron text-center">
-      <h1>Library</h1>
-      <p>Add books to your virtual library</p>
-    </div>
+  <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>
+
+<body>
+  <div class="jumbotron text-center">
+    <h1>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 id="demo" class="collapse">
+    <div class="form-group">
+      <label for="title">Title:</label>
+      <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 />
+
+      <label for="pages">Pages:</label>
+      <input type="number" class="form-control" id="pages" name="pages" required />
 
-    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
-      Add new book
-    </button>
+      <label class="form-check-label">
+        <input type="checkbox" class="form-check-input" id="check" value="" /> Read
+      </label>
 
-    <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 class="form-check-label">
-          <input
-            type="checkbox"
-            class="form-check-input"
-            id="check"
-            value=""
-          />Read
-        </label>
-        <input
-          type="submit"
-          value="Submit"
-          class="btn btn-primary"
-          onclick="submit();"
-        />
-      </div>
+      <input type="submit" value="Submit" class="btn btn-primary" onclick="submit();" />
     </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>
-        <tr>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-        </tr>
-      </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>
 
-    <script src="script.js"></script>
-  </body>
+  <script src="script.js"></script>
+</body>
 </html>

From 9438edd2cbf0b2efdd8fe41b628105c0c1563105 Mon Sep 17 00:00:00 2001
From: JenniferIsidienu <jennieisidienu@gmail.com>
Date: Wed, 20 Aug 2025 19:41:03 +0100
Subject: [PATCH 5/5] Corrections-Book-Library

---
 debugging/book-library/script.js | 50 +++++++++++++++++---------------
 1 file changed, 26 insertions(+), 24 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index e6b83ec2..5ac853e1 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -14,8 +14,8 @@ window.addEventListener("load", function () {
 
 function populateStorage() {
   if (myLibrary.length === 0) {
-    let book1 = new Book("Robinson Crusoe", "Daniel Defoe", "252", true);
-    let book2 = new Book("The Old Man and the Sea", "Ernest Hemingway", "127", true);
+    let book1 = new Book("Robinson Crusoe", "Daniel Defoe", 252, true);
+    let book2 = new Book("The Old Man and the Sea", "Ernest Hemingway", 127, true);
     myLibrary.push(book1, book2);
     render();
   }
@@ -27,41 +27,44 @@ const pages = document.getElementById("pages");
 const check = document.getElementById("check");
 
 function submit() {
-  if (
-    title.value.trim() === "" ||
-    author.value.trim() === "" ||
-    pages.value.trim() === ""
-  ) {
-    alert("Please fill all fields!");
-    return false;
-  } else {
-    let book = new Book(title.value, author.value, pages.value, check.checked);
-    myLibrary.push(book);
-    render();
+  const trimmedTitle = title.value.trim();
+  const trimmedAuthor = author.value.trim();
+  const pagesNumber = Number(pages.value.trim());
 
-    // Clear form
-    title.value = "";
-    author.value = "";
-    pages.value = "";
-    check.checked = false;
+  if (!trimmedTitle || !trimmedAuthor || !pages.value || isNaN(pagesNumber) || pagesNumber <= 0) {
+    alert("Please fill all fields correctly!");
+    return false;
   }
+
+  let book = new Book(trimmedTitle, trimmedAuthor, pagesNumber, check.checked);
+  myLibrary.push(book);
+  render();
+
+  title.value = "";
+  author.value = "";
+  pages.value = "";
+  check.checked = false;
 }
 
 function render() {
   let table = document.getElementById("display");
 
-  // Clear all rows except the header
   for (let i = table.rows.length - 1; i > 0; i--) {
     table.deleteRow(i);
   }
 
   myLibrary.forEach((book, i) => {
     let row = table.insertRow(-1);
-    row.insertCell(0).innerText = book.title;
-    row.insertCell(1).innerText = book.author;
-    row.insertCell(2).innerText = book.pages;
+    
+    let titleCell = row.insertCell(0);
+    titleCell.innerText = book.title;
+
+    let authorCell = row.insertCell(1);
+    authorCell.innerText = book.author;
+
+    let pagesCell = row.insertCell(2);
+    pagesCell.innerText = book.pages;
 
-    // Read status toggle button
     let readCell = row.insertCell(3);
     let readBtn = document.createElement("button");
     readBtn.innerText = book.check ? "Yes" : "No";
@@ -72,7 +75,6 @@ function render() {
     });
     readCell.appendChild(readBtn);
 
-    // Delete button
     let deleteCell = row.insertCell(4);
     let deleteBtn = document.createElement("button");
     deleteBtn.innerText = "Delete";