From d529bf8947c7849b8b288e90d7e3951f23feaf34 Mon Sep 17 00:00:00 2001
From: Enice <mutandaeunice94@gmail.com>
Date: Thu, 20 Aug 2026 01:00:40 +0200
Subject: [PATCH 1/4]  fix :correct invalid HTML in book-library form

 correct invalid HTML in book-library form

- Add proper page title
- Split malformed charset/viewport meta tag into two valid tags
- Fix invalid input types (title/author) to type="text"
- Properly associate checkbox label with for/id
---
 debugging/book-library/index.html | 27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)
diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa71e..9cc1ce439 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,12 +1,9 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title> </title>
-    <meta
-      charset="utf-8"
-      name="viewport"
-      content="width=device-width, initial-scale=1.0"
-    />
+    <title>My 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>
     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
@@ -16,7 +13,6 @@
     />
     <link rel="stylesheet" type="text/css" href="style.css" />
   </head>
-
   <body>
     <div class="jumbotron text-center">
       <h1>Library</h1>
@@ -31,20 +27,22 @@ <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"
@@ -53,14 +51,17 @@ <h1>Library</h1>
           name="pages"
           required
         />
-        <label class="form-check-label">
+
+        <label class="form-check-label" for="check">
           <input
             type="checkbox"
             class="form-check-input"
             id="check"
-            value=""
-          />Read
+            name="check"
+          />
+          Read
         </label>
+
         <input
           type="submit"
           value="Submit"

From 4d6fc7c0411f766fbab5d032b330acbaab52521a Mon Sep 17 00:00:00 2001
From: Enice <mutandaeunice94@gmail.com>
Date: Thu, 20 Aug 2026 01:02:48 +0200
Subject: [PATCH 2/4] fix: resolve multiple bugs in script.js

- Fix Robinson Crusoe title typo
- Use myLibrary instead of undefined library in submit()
- Pass author.value instead of duplicate title.value
- Add missing closing parenthesis in render() loop
- Fix delButton variable name mismatch
- Correct "clicks" event typo to "click"
- Fix read/unread status logic
---
 debugging/book-library/script.js | 42 +++++++++++++++-----------------
 1 file changed, 20 insertions(+), 22 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d3..13516ef7c 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -7,7 +7,7 @@ window.addEventListener("load", function (e) {
 
 function populateStorage() {
   if (myLibrary.length == 0) {
-    let book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
+    let book1 = new Book("Robinson Crusoe", "Daniel Defoe", "252", true);
     let book2 = new Book(
       "The Old Man and the Sea",
       "Ernest Hemingway",
@@ -25,8 +25,8 @@ 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
+// check the right input from forms and if it's ok -> add the new book (object in array)
+// via Book function and start render function
 function submit() {
   if (
     title.value == null ||
@@ -37,8 +37,8 @@ function submit() {
     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();
   }
 }
@@ -53,11 +53,13 @@ function Book(title, author, pages, check) {
 function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;
-  //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
+
+  // delete old rows
+  for (let n = rowsNumber - 1; n > 0; n--) {
     table.deleteRow(n);
   }
-  //insert updated row and cells
+
+  // insert updated row and cells
   let length = myLibrary.length;
   for (let i = 0; i < length; i++) {
     let row = table.insertRow(1);
@@ -66,35 +68,31 @@ function render() {
     let pagesCell = row.insertCell(2);
     let wasReadCell = row.insertCell(3);
     let deleteCell = row.insertCell(4);
+
     titleCell.innerHTML = myLibrary[i].title;
     authorCell.innerHTML = myLibrary[i].author;
     pagesCell.innerHTML = myLibrary[i].pages;
 
-    //add and wait for action for read/unread button
+    // 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;
 
+    let readStatus = myLibrary[i].check ? "Yes" : "No";
+    changeBut.innerText = readStatus;
     changeBut.addEventListener("click", function () {
       myLibrary[i].check = !myLibrary[i].check;
       render();
     });
 
-    //add delete button to every row and render again
+    // 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 () {
+    delButton.id = i + 5;
+    delButton.className = "btn btn-warning";
+    delButton.innerHTML = "Delete";
+    deleteCell.appendChild(delButton);
+    delButton.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();

From b065febe8a387c325c22fb147e55d4528bd4528c Mon Sep 17 00:00:00 2001
From: Enice <mutandaeunice94@gmail.com>
Date: Fri, 21 Aug 2026 13:23:03 +0200
Subject: [PATCH 3/4] Refactor book form and update button structure

made changes where needed to be
---
 debugging/book-library/index.html | 35 +++++++++++++++----------------
 1 file changed, 17 insertions(+), 18 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 9cc1ce439..9a7cbb3b3 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -12,6 +12,7 @@
       href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
     />
     <link rel="stylesheet" type="text/css" href="style.css" />
+    <script src="script.js" type="module"></script>
   </head>
   <body>
     <div class="jumbotron text-center">
@@ -19,12 +20,17 @@ <h1>Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 
-    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
+    <button
+      id="add-book-toggle"
+      data-toggle="collapse"
+      data-target="#demo"
+      class="btn btn-info"
+    >
       Add new book
     </button>
 
     <div id="demo" class="collapse">
-      <div class="form-group">
+      <form id="book-form" class="form-group">
         <label for="title">Title:</label>
         <input
           type="text"
@@ -49,26 +55,29 @@ <h1>Library</h1>
           class="form-control"
           id="pages"
           name="pages"
+          min="1"
+          step="1"
           required
         />
 
-        <label class="form-check-label" for="check">
+        <div class="form-check">
           <input
             type="checkbox"
             class="form-check-input"
             id="check"
             name="check"
           />
-          Read
-        </label>
+          <label class="form-check-label" for="check">Read</label>
+        </div>
 
         <input
           type="submit"
+          id="submit"
+          name="submit"
           value="Submit"
           class="btn btn-primary"
-          onclick="submit();"
         />
-      </div>
+      </form>
     </div>
 
     <table class="table" id="display">
@@ -81,17 +90,7 @@ <h1>Library</h1>
           <th></th>
         </tr>
       </thead>
-      <tbody>
-        <tr>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-        </tr>
-      </tbody>
+      <tbody id="display-body"></tbody>
     </table>
-
-    <script src="script.js"></script>
   </body>
 </html>

From cc323d00cda4ec4523c52f0507ba627b0a379e53 Mon Sep 17 00:00:00 2001
From: Enice <mutandaeunice94@gmail.com>
Date: Fri, 21 Aug 2026 13:25:26 +0200
Subject: [PATCH 4/4] Refactor script.js for better readability and
 functionality

modified file
---
 debugging/book-library/script.js | 124 +++++++++++++++----------------
 1 file changed, 59 insertions(+), 65 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 13516ef7c..fcd655320 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,47 +1,53 @@
-let myLibrary = [];
+const myLibrary = [];
 
-window.addEventListener("load", function (e) {
+window.addEventListener("load", function () {
   populateStorage();
   render();
 });
 
+// Seed the library with two starter books on first load.
 function populateStorage() {
-  if (myLibrary.length == 0) {
-    let book1 = new Book("Robinson Crusoe", "Daniel Defoe", "252", true);
-    let book2 = new Book(
+  if (myLibrary.length === 0) {
+    const book1 = new Book("Robinson Crusoe", "Daniel Defoe", 252, true);
+    const book2 = new Book(
       "The Old Man and the Sea",
       "Ernest Hemingway",
-      "127",
+      127,
       true
     );
-    myLibrary.push(book1);
-    myLibrary.push(book2);
-    render();
+    myLibrary.push(book1, book2);
   }
 }
 
-const title = document.getElementById("title");
-const author = document.getElementById("author");
-const pages = document.getElementById("pages");
-const check = document.getElementById("check");
+const titleInput = document.getElementById("title");
+const authorInput = document.getElementById("author");
+const pagesInput = document.getElementById("pages");
+const checkInput = document.getElementById("check");
+const bookForm = document.getElementById("book-form");
 
-// check the right input from forms and if it's 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 == ""
-  ) {
+// Validate form input, build a new Book, add it to the library, and re-render.
+bookForm.addEventListener("submit", function (e) {
+  e.preventDefault();
+
+  const titleValue = titleInput.value.trim();
+  const authorValue = authorInput.value.trim();
+  const pagesValue = pagesInput.value.trim();
+
+  if (titleValue === "" || pagesValue === "") {
     alert("Please fill all fields!");
-    return false;
-  } else {
-    let book = new Book(title.value, author.value, pages.value, check.checked);
-    myLibrary.push(book);
-    render();
+    return;
   }
-}
+
+  const book = new Book(
+    titleValue,
+    authorValue,
+    Number(pagesValue),
+    checkInput.checked
+  );
+  myLibrary.push(book);
+  render();
+  bookForm.reset();
+});
 
 function Book(title, author, pages, check) {
   this.title = title;
@@ -51,51 +57,39 @@ function Book(title, author, pages, check) {
 }
 
 function render() {
-  let table = document.getElementById("display");
-  let rowsNumber = table.rows.length;
-
-  // delete old rows
-  for (let n = rowsNumber - 1; n > 0; n--) {
-    table.deleteRow(n);
-  }
+  const tbody = document.getElementById("display-body");
+  tbody.innerHTML = ""; // clear all rows in one operation
 
-  // 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);
+  myLibrary.forEach((book, i) => {
+    const row = tbody.insertRow();
+    const titleCell = row.insertCell(0);
+    const authorCell = row.insertCell(1);
+    const pagesCell = row.insertCell(2);
+    const readCell = row.insertCell(3);
+    const deleteCell = row.insertCell(4);
 
-    titleCell.innerHTML = myLibrary[i].title;
-    authorCell.innerHTML = myLibrary[i].author;
-    pagesCell.innerHTML = myLibrary[i].pages;
+    titleCell.textContent = book.title;
+    authorCell.textContent = book.author;
+    pagesCell.textContent = book.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 = myLibrary[i].check ? "Yes" : "No";
-    changeBut.innerText = readStatus;
-    changeBut.addEventListener("click", function () {
+    const readToggleBtn = document.createElement("button");
+    readToggleBtn.className = "btn btn-success";
+    readToggleBtn.innerText = book.check ? "Yes" : "No";
+    readToggleBtn.addEventListener("click", function () {
       myLibrary[i].check = !myLibrary[i].check;
       render();
     });
+    readCell.appendChild(readToggleBtn);
 
-    // add delete button to every row and render again
-    let delButton = document.createElement("button");
-    delButton.id = i + 5;
-    delButton.className = "btn btn-warning";
-    delButton.innerHTML = "Delete";
-    deleteCell.appendChild(delButton);
-    delButton.addEventListener("click", function () {
-      alert(`You've deleted title: ${myLibrary[i].title}`);
+    const deleteBtn = document.createElement("button");
+    deleteBtn.className = "btn btn-warning";
+    deleteBtn.textContent = "Delete";
+    deleteBtn.addEventListener("click", function () {
+      const deletedTitle = myLibrary[i].title;
       myLibrary.splice(i, 1);
       render();
+      alert(`You've deleted title: ${deletedTitle}`); // shown after deletion completes
     });
-  }
+    deleteCell.appendChild(deleteBtn);
+  });
 }
