CodeYourFuture · Dipa-Sarker · Aug 6, 2026 · Aug 9, 2026 · Aug 11, 2026 · cjyuan
diff --git a/debugging/book-library/debugging-notes.md b/debugging/book-library/debugging-notes.md
@@ -0,0 +1,61 @@
+# HTML Debugging Checklist
+
+## Page Structure
+
+## Book Input Form
+
+## Add Book Button
+
+## Book Display Area
+
+## Delete Functionality
+
+## Read Status
+
+## Validation Support
+
+## Browser Testing
+
+
+# JavaScript Debugging Checklist
+
+## Library Data Storage
+
+## Page Loading
+
+## Add Book Function
+
+## Book Constructor
+
+## Render Function
+
+## Read/Unread Button
+
+## Delete Button
+
+## Console Errors
+
+
+## Final Testing
+- [ ] Add a book with all information
+- [ ] Add a book without title
+- [ ] Add a book without author
+- [ ] Add a book without pages
+- [ ] Add a read book
+- [ ] Add an unread book
+- [ ] Delete a book
+- [ ] Change read/unread status
+
+# HTML correction:
+- input type 
+- submit function
+- 
+# Script.js correction:
+- delete e from addEventListener
+- correct book name
+- add input validation for author value in submit() function
+- add author.value replacing title.value in new Book()
+- replace library by myLibrary
+- correct check == true/false and made correction for readstatus = yes/no for read button
+- correct variable name delBut > delButton
+- correct clicks > click
diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
@@ -1,12 +1,9 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
-    <title> </title>
-    <meta
-      charset="utf-8"
-      name="viewport"
-      content="width=device-width, initial-scale=1.0"
-    />
+    <title>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>
@@ -28,18 +25,19 @@ <h1>Library</h1>
     </button>
 
     <div id="demo" class="collapse">
+      <form id="bookForm">
       <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>
         <input
-          type="author"
+          type="text"
           class="form-control"
           id="author"
           name="author"
@@ -51,6 +49,7 @@ <h1>Library</h1>
           class="form-control"
           id="pages"
           name="pages"
+          min ="1"
           required
         />
         <label class="form-check-label">
@@ -65,10 +64,12 @@ <h1>Library</h1>
           type="submit"
           value="Submit"
           class="btn btn-primary"
-          onclick="submit();"
         />
       </div>
+      </form>
     </div>
+
+    <div id="message"></div>
 
     <table class="table" id="display">
       <thead class="thead-dark">
@@ -80,17 +81,9 @@ <h1>Library</h1>
           <th></th>
         </tr>
       </thead>
-      <tbody>
-        <tr>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-          <td></td>
-        </tr>
-      </tbody>
+      <tbody id="library"></tbody>
     </table>
 
-    <script src="script.js"></script>
+    <script src="script.js" type="module"></script>
   </body>
 </html>
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
@@ -1,17 +1,39 @@
-let myLibrary = [];
+const titleInput = document.getElementById("title"); //rename all variable names
+const authorInput = document.getElementById("author");
+const pagesInput = document.getElementById("pages");
+const checkInput = document.getElementById("check");
+const bookForm = document.getElementById("bookForm");
+const library = document.getElementById("library"); //newly created id for cleaning all existing row 
+const message = document.getElementById("message"); //get element for warning message
 
-window.addEventListener("load", function (e) {
+const myLibrary = []; //use const to avoid reassignment
+
+/*window.addEventListener("load", function () {
+  //delete e as it is never used
   populateStorage();
   render();
-});
+}); */
+
+function setup() { // setup () function prepares everything that should happen once 
+  // when the page loads and before user starts doing anything
+  bookForm.addEventListener("submit", function (event) { //after user submits the book form 
+  // this will run submit () function to add book
+    event.preventDefault();
+    submit();
+  });
+
+  populateStorage();
+}
+
+setup();
 
 function populateStorage() {
   if (myLibrary.length == 0) {
-    let book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
-    let book2 = new Book(
+    const book1 = new Book("Robinson Crusoe", "Daniel Defoe", 252, true); //correct book name
+    const book2 = new Book(
       "The Old Man and the Sea",
       "Ernest Hemingway",
-      "127",
+      127,
       true
     );
     myLibrary.push(book1);
@@ -20,27 +42,32 @@ function populateStorage() {
   }
 }
 
-const title = document.getElementById("title");
-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() {
+  const title = titleInput.value.trim(); //use .trim() to remove extra spaces
+  const author = authorInput.value.trim();
+  const pages = Number(pagesInput.value);
   if (
-    title.value == null ||
-    title.value == "" ||
-    pages.value == null ||
-    pages.value == ""
+    title === "" ||
+
+    author === "" || //need input validation for author value, added this
+
+    pagesInput.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();
   }
+    if (pages < 1) {
+    alert("Pages must be at least 1!");
+    return false;
+  }
+
+    const book = new Book(title, author, pages, checkInput.checked); //added author.value by
+    // replacing 2nd title.value to author.value
+    myLibrary.push(book); //corrected name for original array library > myLibrary
+    render();
 }
 
 function Book(title, author, pages, check) {
@@ -51,53 +78,57 @@ 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-- {
-    table.deleteRow(n);
-  }
+ // delete all old row at once
+
+ library.innerHTML = ""; //clean all old rows
+
   //insert updated row and cells
-  let length = myLibrary.length;
+  const 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;
+    const row = library.insertRow();
+    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; // replaced all innerHTML by textContent
+    authorCell.textContent = myLibrary[i].author;
+    pagesCell.textContent = 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;
-
-    changeBut.addEventListener("click", function () {
+    const changeButton = document.createElement("button"); //correct changeBut > changeButton
+    changeButton.className = "btn btn-success";
+    wasReadCell.appendChild(changeButton);
+    const readStatus = myLibrary[i].check ? "Yes" : "No";
+    changeButton.textContent = readStatus;
+    changeButton.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: ${myLibrary[i].title}`);
-      myLibrary.splice(i, 1);
-      render();
-    });
+    let deleteButton = document.createElement("button");
+    deleteCell.appendChild(deleteButton);
+    deleteButton.className = "btn btn-warning";
+    deleteButton.textContent = "Delete";
+    deleteButton.addEventListener("click", function () {
+      // correct clicks > click
+      const deletedTitle = myLibrary[i].title; // store the title which book will delete
+
+       const confirmed = confirm( //use confirm () to handle popup message for ok/cancel
+      `Are you sure you want to delete "${deletedTitle}"?`
+       );
+
+   if (confirmed) { //if confirm then user click ok and book will delete
+    myLibrary.splice(i, 1);
+    render(); //updates page 
+
+    message.textContent = `Book "${deletedTitle}" was deleted.`; //after clicking ok, th book delete
+    // and the message shows immediately
+  }
+  });
   }
+
 }