From 4a0a2687f5b77a5de9e412d98ed924ff07d1e299 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Wed, 17 Dec 2025 23:54:02 +0000
Subject: [PATCH 1/3] book laibrary has been completed

---
 debugging/book-library/index.html |  35 +-----
 debugging/book-library/script.js  | 197 +++++++++++++++++-------------
 debugging/book-library/style.css  |  21 ++++
 3 files changed, 141 insertions(+), 112 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa71..2ba1cf41 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -30,21 +30,9 @@ <h1>Library</h1>
     <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
-        />
+     <input type="text" class="form-control" id="title" name="title" required />
         <label for="author">Author: </label>
-        <input
-          type="author"
-          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"
@@ -61,12 +49,7 @@ <h1>Library</h1>
             value=""
           />Read
         </label>
-        <input
-          type="submit"
-          value="Submit"
-          class="btn btn-primary"
-          onclick="submit();"
-        />
+        <input type="button" value="Submit" class="btn btn-primary" onclick="addBook();" />
       </div>
     </div>
 
@@ -80,15 +63,9 @@ <h1>Library</h1>
           <th></th>
         </tr>
       </thead>
-      <tbody>
-        <tr>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-        </tr>
-      </tbody>
+    <tbody>
+</tbody>
+
     </table>
 
     <script src="script.js"></script>
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d..858f2671 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,23 +1,23 @@
 let myLibrary = [];
 
-window.addEventListener("load", function (e) {
-  populateStorage();
-  render();
+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);
-    render();
-  }
+    if (myLibrary.length === 0) {
+        let book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
+        let book2 = new Book(
+            "The Old Man and the Sea",
+            "Ernest Hemingway",
+            "127",
+            true
+        );
+        myLibrary.push(book1);
+        myLibrary.push(book2);
+        render();
+    }
 }
 
 const title = document.getElementById("title");
@@ -25,79 +25,110 @@ 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 == ""
-  ) {
-    alert("Please fill all fields!");
-    return false;
-  } else {
-    let book = new Book(title.value, title.value, pages.value, check.checked);
-    library.push(book);
+// Check the input from forms and, if valid, add the new book (object in array)
+// via Book constructor and start render function
+function addBook() {
+    if (
+        title.value == null ||
+        title.value === "" ||
+        pages.value == null ||
+        pages.value === ""
+    ) {
+        showError("Please fill all fields!");
+        return false;
+    }
+
+    if (myLibrary.some(b => b.title === title.value && b.author === author.value)) {
+        showError("This book already exists!");
+        return;
+    }
+
+    if (!isNaN(title.value.trim()) || !isNaN(author.value.trim())) {
+        showError("Title and Author must be text!");
+        return;
+    }
+
+   let book = new Book(title.value, author.value, Number(pages.value), check.checked);
+    myLibrary.push(book);
     render();
-  }
 }
 
-function Book(title, author, pages, check) {
-  this.title = title;
-  this.author = author;
-  this.pages = pages;
-  this.check = check;
+// Clear any previous error messages
+document.getElementById("errorMessage").style.display = "none";
+
+function Book(title, author, pages, read) {
+    this.title = title;
+    this.author = author;
+    this.pages = pages;
+    this.read = read;
 }
 
+
 function render() {
-  let table = document.getElementById("display");
-  let rowsNumber = table.rows.length;
-  //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
-    table.deleteRow(n);
-  }
-  //insert updated row and cells
-  let length = myLibrary.length;
-  for (let i = 0; i < length; i++) {
-    let row = table.insertRow(1);
-    let titleCell = row.insertCell(0);
-    let authorCell = row.insertCell(1);
-    let pagesCell = row.insertCell(2);
-    let wasReadCell = row.insertCell(3);
-    let deleteCell = row.insertCell(4);
-    titleCell.innerHTML = myLibrary[i].title;
-    authorCell.innerHTML = myLibrary[i].author;
-    pagesCell.innerHTML = myLibrary[i].pages;
-
-    //add and wait for action for read/unread button
-    let changeBut = document.createElement("button");
-    changeBut.id = i;
-    changeBut.className = "btn btn-success";
-    wasReadCell.appendChild(changeBut);
-    let readStatus = "";
-    if (myLibrary[i].check == false) {
-      readStatus = "Yes";
-    } else {
-      readStatus = "No";
+    let table = document.getElementById("display");
+    let rowsNumber = table.rows.length;
+
+    // Delete old table rows
+    for (let n = rowsNumber - 1; n > 0; n--) {
+        table.deleteRow(n);
+    }
+
+    // Insert updated rows 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 configure read/unread button
+        let changeBut = document.createElement("button");
+        changeBut.id = i;
+        changeBut.className = "btn btn-primary";
+        wasReadCell.appendChild(changeBut);
+
+        let readStatus = myLibrary[i].check ? "Yes" : "No";
+        changeBut.innerHTML = readStatus;
+
+        if (myLibrary[i].check) {
+            changeBut.className = "btn btn-success";
+        }
+
+        changeBut.addEventListener("click", function () {
+            myLibrary[i].check = !myLibrary[i].check;
+            render();
+        });
+
+        // Add delete button to each row
+        let delBut = document.createElement("button");
+        delBut.id = i + 5;
+        delBut.className = "btn btn-warning";
+        delBut.innerHTML = "Delete";
+        deleteCell.appendChild(delBut);
+
+       delBut.setAttribute("data-index", i);
+delBut.addEventListener("click", function () {
+    let index = this.getAttribute("data-index");
+    showError(`You've deleted title: ${myLibrary[index].title}`);
+    myLibrary.splice(index, 1);
+    render();
+});
     }
-    changeBut.innerText = readStatus;
-
-    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);
-    delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
-      alert(`You've deleted title: ${myLibrary[i].title}`);
-      myLibrary.splice(i, 1);
-      render();
-    });
-  }
 }
+
+// Handle error messages
+function showError(message) {
+    let errorMessCont = document.getElementById("errorMessage");
+    errorMessCont.textContent = message;
+    errorMessCont.classList.add("show");
+
+    setTimeout(() => {
+        errorMessCont.classList.remove("show");
+    }, 3000);
+}
\ No newline at end of file
diff --git a/debugging/book-library/style.css b/debugging/book-library/style.css
index 302950cb..ed712f67 100644
--- a/debugging/book-library/style.css
+++ b/debugging/book-library/style.css
@@ -17,3 +17,24 @@
 button.btn-info {
   margin: 20px;
 }
+#errorMessage {
+  margin-right: 0;
+  color: white; 
+  background-color: hsla(0, 88%, 42%, 0.7); 
+  padding: 20px;  
+  border-radius: 5px;
+  width: 30%; 
+  text-align: center; 
+  font-weight: bold; 
+  display:none ; 
+  position: absolute;
+  z-index: 1000; 
+  top: 20px; 
+  right: 20px
+}
+
+#errorMessage.show {
+  display: block;
+  opacity: 1;
+  transform: translateX(0)
+}

From 05f6ca026a39115eb5a8e2d0a039613f2d6922b3 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Fri, 19 Dec 2025 18:17:38 +0000
Subject: [PATCH 2/3] Add error message and improving the code

---
 debugging/book-library/index.html | 115 +++++++----------
 debugging/book-library/script.js  | 208 +++++++++++++-----------------
 debugging/book-library/style.css  |  28 ++--
 3 files changed, 153 insertions(+), 198 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 2ba1cf41..0173d458 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,73 +1,54 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <title> </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>
+<head>
+  <meta charset="utf-8" />
+  <title>Library</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" />
+  <link rel="stylesheet" href="style.css" />
+</head>
+<body>
+  <div class="jumbotron text-center">
+    <h1>Library</h1>
+    <p>Add books to your virtual library</p>
+  </div>
+  <div id="errorMessage"></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="titleInput" name="title" required />
+      <label for="author">Author:</label>
+      <input type="text" class="form-control" id="authorInput" name="author" required />
+      <label for="pages">Pages:</label>
+      <input type="number" class="form-control" id="pagesInput" name="pages" required />
 
-  <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>
+      <label class="form-check-label">
+        <input type="checkbox" class="form-check-input" id="readInput" />
+        Read
+      </label>
 
-    <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
-        />
-        <label class="form-check-label">
-          <input
-            type="checkbox"
-            class="form-check-input"
-            id="check"
-            value=""
-          />Read
-        </label>
-        <input type="button" value="Submit" class="btn btn-primary" onclick="addBook();" />
-      </div>
+      <button id="submitBtn" class="btn btn-primary">Submit</button>
     </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>
+  <script src="https://code.jquery.com/jquery-3.4.1.slim.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>
+  <script src="script.js" type="module"></script>
+</body>
 
-    <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>
-</html>
+</html>
\ No newline at end of file
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 858f2671..bb0a45fa 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,134 +1,108 @@
 let myLibrary = [];
 
-window.addEventListener("load", function () {
-    populateStorage();
-    render();
+const titleInput = document.getElementById("titleInput");
+const authorInput = document.getElementById("authorInput");
+const pagesInput = document.getElementById("pagesInput");
+const readInput = document.getElementById("readInput");
+const errorBox = document.getElementById("errorMessage");
+const tableBody = document.querySelector("#display tbody");
+
+window.addEventListener("load", () => {
+  populateInitialBooks();
+  render();
 });
 
-function populateStorage() {
-    if (myLibrary.length === 0) {
-        let book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
-        let book2 = new Book(
-            "The Old Man and the Sea",
-            "Ernest Hemingway",
-            "127",
-            true
-        );
-        myLibrary.push(book1);
-        myLibrary.push(book2);
-        render();
-    }
+function Book(title, author, pages, read) {
+  this.title = title;
+  this.author = author;
+  this.pages = pages; // number
+  this.read = read;   // boolean
 }
 
-const title = document.getElementById("title");
-const author = document.getElementById("author");
-const pages = document.getElementById("pages");
-const check = document.getElementById("check");
+function populateInitialBooks() {
+  if (myLibrary.length > 0) return;
+
+  myLibrary.push(
+    new Book("Robinson Crusoe", "Daniel Defoe", 252, true),
+    new Book("The Old Man and the Sea", "Ernest Hemingway", 127, true)
+  );
+}
 
-// Check the input from forms and, if valid, add the new book (object in array)
-// via Book constructor and start render function
 function addBook() {
-    if (
-        title.value == null ||
-        title.value === "" ||
-        pages.value == null ||
-        pages.value === ""
-    ) {
-        showError("Please fill all fields!");
-        return false;
-    }
-
-    if (myLibrary.some(b => b.title === title.value && b.author === author.value)) {
-        showError("This book already exists!");
-        return;
-    }
-
-    if (!isNaN(title.value.trim()) || !isNaN(author.value.trim())) {
-        showError("Title and Author must be text!");
-        return;
-    }
-
-   let book = new Book(title.value, author.value, Number(pages.value), check.checked);
-    myLibrary.push(book);
-    render();
+  const title = titleInput.value.trim();
+  const author = authorInput.value.trim();
+  const pages = pagesInput.value.trim();
+  const read = readInput.checked;
+
+  if (!title || !author || !pages) {
+    showError("Please fill all fields!");
+    return;
+  }
+
+  if (isNaN(Number(pages)) || Number(pages) <= 0) {
+    showError("Pages must be a positive number.");
+    return;
+  }
+
+  if (myLibrary.some(b => b.title === title && b.author === author)) {
+    showError("This book already exists!");
+    return;
+  }
+
+  const book = new Book(title, author, Number(pages), read);
+  myLibrary.push(book);
+  clearForm();
+  render();
 }
 
-// Clear any previous error messages
-document.getElementById("errorMessage").style.display = "none";
+document.getElementById("submitBtn").addEventListener("click", addBook);
 
-function Book(title, author, pages, read) {
-    this.title = title;
-    this.author = author;
-    this.pages = pages;
-    this.read = read;
+function clearForm() {
+  titleInput.value = "";
+  authorInput.value = "";
+  pagesInput.value = "";
+  readInput.checked = false;
 }
 
-
 function render() {
-    let table = document.getElementById("display");
-    let rowsNumber = table.rows.length;
-
-    // Delete old table rows
-    for (let n = rowsNumber - 1; n > 0; n--) {
-        table.deleteRow(n);
-    }
-
-    // Insert updated rows 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 configure read/unread button
-        let changeBut = document.createElement("button");
-        changeBut.id = i;
-        changeBut.className = "btn btn-primary";
-        wasReadCell.appendChild(changeBut);
-
-        let readStatus = myLibrary[i].check ? "Yes" : "No";
-        changeBut.innerHTML = readStatus;
-
-        if (myLibrary[i].check) {
-            changeBut.className = "btn btn-success";
-        }
-
-        changeBut.addEventListener("click", function () {
-            myLibrary[i].check = !myLibrary[i].check;
-            render();
-        });
-
-        // Add delete button to each row
-        let delBut = document.createElement("button");
-        delBut.id = i + 5;
-        delBut.className = "btn btn-warning";
-        delBut.innerHTML = "Delete";
-        deleteCell.appendChild(delBut);
-
-       delBut.setAttribute("data-index", i);
-delBut.addEventListener("click", function () {
-    let index = this.getAttribute("data-index");
-    showError(`You've deleted title: ${myLibrary[index].title}`);
-    myLibrary.splice(index, 1);
-    render();
-});
-    }
+  tableBody.innerHTML = "";
+
+  myLibrary.forEach((book, index) => {
+    const row = tableBody.insertRow();
+
+    const titleCell = row.insertCell();
+    const authorCell = row.insertCell();
+    const pagesCell = row.insertCell();
+    const readCell = row.insertCell();
+    const deleteCell = row.insertCell();
+
+    titleCell.textContent = book.title;
+    authorCell.textContent = book.author;
+    pagesCell.textContent = book.pages;
+
+    const toggleBtn = document.createElement("button");
+    toggleBtn.className = book.read ? "btn btn-success" : "btn btn-primary";
+    toggleBtn.textContent = book.read ? "Yes" : "No";
+    toggleBtn.addEventListener("click", () => {
+      book.read = !book.read;
+      render();
+    });
+    readCell.appendChild(toggleBtn);
+
+    const delBtn = document.createElement("button");
+    delBtn.className = "btn btn-warning";
+    delBtn.textContent = "Delete";
+    delBtn.addEventListener("click", () => {
+      myLibrary.splice(index, 1);
+      render();
+      showError(`Deleted: ${book.title}`);
+    });
+    deleteCell.appendChild(delBtn);
+  });
 }
 
-// Handle error messages
 function showError(message) {
-    let errorMessCont = document.getElementById("errorMessage");
-    errorMessCont.textContent = message;
-    errorMessCont.classList.add("show");
-
-    setTimeout(() => {
-        errorMessCont.classList.remove("show");
-    }, 3000);
-}
\ No newline at end of file
+  errorBox.textContent = message;
+  errorBox.classList.add("show");
+  setTimeout(() => errorBox.classList.remove("show"), 3000);
+}
diff --git a/debugging/book-library/style.css b/debugging/book-library/style.css
index ed712f67..8730a0c0 100644
--- a/debugging/book-library/style.css
+++ b/debugging/book-library/style.css
@@ -1,7 +1,6 @@
 .form-group {
   width: 400px;
   height: 300px;
-  align-self: left;
   padding-left: 20px;
 }
 
@@ -11,30 +10,31 @@
 
 .form-check-label {
   padding-left: 20px;
-  margin: 5px 0px 5px 0px;
+  margin: 5px 0;
 }
 
 button.btn-info {
   margin: 20px;
 }
+
 #errorMessage {
   margin-right: 0;
-  color: white; 
-  background-color: hsla(0, 88%, 42%, 0.7); 
-  padding: 20px;  
+  color: white;
+  background-color: hsla(0, 88%, 42%, 0.7);
+  padding: 20px;
   border-radius: 5px;
-  width: 30%; 
-  text-align: center; 
-  font-weight: bold; 
-  display:none ; 
+  width: 30%;
+  text-align: center;
+  font-weight: bold;
+  display: none;
   position: absolute;
-  z-index: 1000; 
-  top: 20px; 
-  right: 20px
+  z-index: 1000;
+  top: 20px;
+  right: 20px;
 }
 
 #errorMessage.show {
   display: block;
   opacity: 1;
-  transform: translateX(0)
-}
+  transform: translateX(0);
+}
\ No newline at end of file

From 5c86e22f119387b900b6204e7e50bba40b3f31c2 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Fri, 19 Dec 2025 22:11:25 +0000
Subject: [PATCH 3/3] Refactor page number validation

---
 debugging/book-library/index.html | 1 -
 debugging/book-library/script.js  | 8 +++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 0173d458..fefc1151 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -50,5 +50,4 @@ <h1>Library</h1>
   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
   <script src="script.js" type="module"></script>
 </body>
-
 </html>
\ No newline at end of file
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index bb0a45fa..e8d1aa79 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -39,8 +39,9 @@ function addBook() {
     return;
   }
 
-  if (isNaN(Number(pages)) || Number(pages) <= 0) {
-    showError("Pages must be a positive number.");
+  const pageNum = Number(pages);
+  if (!Number.isInteger(pageNum) || pageNum <= 0) {
+    showError("Pages must be a positive whole number.");
     return;
   }
 
@@ -49,12 +50,13 @@ function addBook() {
     return;
   }
 
-  const book = new Book(title, author, Number(pages), read);
+  const book = new Book(title, author, pageNum, read);
   myLibrary.push(book);
   clearForm();
   render();
 }
 
+
 document.getElementById("submitBtn").addEventListener("click", addBook);
 
 function clearForm() {