From 619b369282c401a4b1b48128eafabdcb413db868 Mon Sep 17 00:00:00 2001
From: Richard Frimpong <richardfrimpongalx@gmail.com>
Date: Tue, 14 Apr 2026 13:49:45 +0100
Subject: [PATCH 1/2] Fix book library debugging issues

---
 debugging/book-library/script.js | 99 ++++++++++++++++----------------
 1 file changed, 50 insertions(+), 49 deletions(-)

diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d..109daa41 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -1,22 +1,22 @@
 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(
+  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",
       true
     );
+
     myLibrary.push(book1);
     myLibrary.push(book2);
-    render();
   }
 }
 
@@ -25,22 +25,32 @@ 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);
-    render();
   }
+
+  const book = new Book(
+    title.value.trim(),
+    author.value.trim(),
+    pages.value.trim(),
+    check.checked
+  );
+
+  myLibrary.push(book);
+  render();
+
+  title.value = "";
+  author.value = "";
+  pages.value = "";
+  check.checked = false;
+
+  return false;
 }
 
 function Book(title, author, pages, check) {
@@ -51,50 +61,41 @@ 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-- {
+  const table = document.getElementById("display");
+  const rowsNumber = table.rows.length;
+
+  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;
+
+  for (let i = 0; i < myLibrary.length; i++) {
+    const row = table.insertRow(-1);
+    const titleCell = row.insertCell(0);
+    const authorCell = row.insertCell(1);
+    const pagesCell = row.insertCell(2);
+    const wasReadCell = row.insertCell(3);
+    const deleteCell = row.insertCell(4);
+
+    titleCell.textContent = myLibrary[i].title;
+    authorCell.textContent = myLibrary[i].author;
+    pagesCell.textContent = myLibrary[i].pages;
+
+    const changeBut = document.createElement("button");
     changeBut.className = "btn btn-success";
+    changeBut.textContent = 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();
     });
 
-    //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 () {
+    const delButton = document.createElement("button");
+    delButton.className = "btn btn-warning";
+    delButton.textContent = "Delete";
+    deleteCell.appendChild(delButton);
+
+    delButton.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();

From d36d1cfcc85dd200d5cbf6a48d053c0854a193f5 Mon Sep 17 00:00:00 2001
From: Richard Frimpong <richardfrimpongalx@gmail.com>
Date: Tue, 14 Apr 2026 14:16:33 +0100
Subject: [PATCH 2/2] Improve book library validation and cleanup

---
 debugging/book-library/index.html | 46 ++++++++----------
 debugging/book-library/script.js  | 79 +++++++++++++++----------------
 2 files changed, 57 insertions(+), 68 deletions(-)

diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa71..c25c5bc5 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,20 +1,19 @@
-<!DOCTYPE html>
-<html>
+<!doctype html>
+<html lang="en">
   <head>
-    <title> </title>
-    <meta
-      charset="utf-8"
-      name="viewport"
-      content="width=device-width, initial-scale=1.0"
-    />
+    <meta charset="utf-8" />
+    <meta 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" />
+    <link rel="stylesheet" href="style.css" />
   </head>
 
   <body>
@@ -31,36 +30,37 @@ <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"
           name="pages"
+          min="1"
           required
         />
+
         <label class="form-check-label">
-          <input
-            type="checkbox"
-            class="form-check-input"
-            id="check"
-            value=""
-          />Read
+          <input type="checkbox" class="form-check-input" id="check" value="" />
+          Read
         </label>
+
         <input
           type="submit"
           value="Submit"
@@ -80,15 +80,7 @@ <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>
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 109daa41..e6cfbfd2 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -7,48 +7,47 @@ window.addEventListener("load", function () {
 
 function populateStorage() {
   if (myLibrary.length === 0) {
-    const book1 = new Book("Robinson Crusoe", "Daniel Defoe", "252", true);
+    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);
+    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 readInput = document.getElementById("check");
 
 function submit() {
+  const titleValue = titleInput.value.trim();
+  const authorValue = authorInput.value.trim();
+  const pagesValue = Number(pagesInput.value.trim());
+
   if (
-    title.value.trim() === "" ||
-    author.value.trim() === "" ||
-    pages.value.trim() === ""
+    titleValue === "" ||
+    authorValue === "" ||
+    !Number.isInteger(pagesValue) ||
+    pagesValue <= 0
   ) {
-    alert("Please fill all fields!");
+    alert("Please enter a valid title, author, and page count.");
     return false;
   }
 
-  const book = new Book(
-    title.value.trim(),
-    author.value.trim(),
-    pages.value.trim(),
-    check.checked
-  );
+  const book = new Book(titleValue, authorValue, pagesValue, readInput.checked);
 
   myLibrary.push(book);
   render();
 
-  title.value = "";
-  author.value = "";
-  pages.value = "";
-  check.checked = false;
+  titleInput.value = "";
+  authorInput.value = "";
+  pagesInput.value = "";
+  readInput.checked = false;
 
   return false;
 }
@@ -61,44 +60,42 @@ function Book(title, author, pages, check) {
 }
 
 function render() {
-  const table = document.getElementById("display");
-  const rowsNumber = table.rows.length;
-
-  for (let n = rowsNumber - 1; n > 0; n--) {
-    table.deleteRow(n);
-  }
+  const tableBody = document.querySelector("#display tbody");
+  tableBody.innerHTML = "";
 
   for (let i = 0; i < myLibrary.length; i++) {
-    const row = table.insertRow(-1);
+    const row = tableBody.insertRow();
+
     const titleCell = row.insertCell(0);
     const authorCell = row.insertCell(1);
     const pagesCell = row.insertCell(2);
-    const wasReadCell = row.insertCell(3);
+    const readCell = row.insertCell(3);
     const deleteCell = row.insertCell(4);
 
     titleCell.textContent = myLibrary[i].title;
     authorCell.textContent = myLibrary[i].author;
     pagesCell.textContent = myLibrary[i].pages;
 
-    const changeBut = document.createElement("button");
-    changeBut.className = "btn btn-success";
-    changeBut.textContent = myLibrary[i].check ? "Yes" : "No";
-    wasReadCell.appendChild(changeBut);
+    const readButton = document.createElement("button");
+    readButton.className = "btn btn-success";
+    readButton.textContent = myLibrary[i].check ? "Yes" : "No";
+    readCell.appendChild(readButton);
 
-    changeBut.addEventListener("click", function () {
+    readButton.addEventListener("click", function () {
       myLibrary[i].check = !myLibrary[i].check;
       render();
     });
 
-    const delButton = document.createElement("button");
-    delButton.className = "btn btn-warning";
-    delButton.textContent = "Delete";
-    deleteCell.appendChild(delButton);
+    const deleteButton = document.createElement("button");
+    deleteButton.className = "btn btn-warning";
+    deleteButton.textContent = "Delete";
+    deleteCell.appendChild(deleteButton);
 
-    delButton.addEventListener("click", function () {
-      alert(`You've deleted title: ${myLibrary[i].title}`);
+    deleteButton.addEventListener("click", function () {
+      const deletedTitle = myLibrary[i].title;
       myLibrary.splice(i, 1);
       render();
+      alert(`You've deleted title: ${deletedTitle}`);
     });
   }
 }