Book Library bugs fixed and Book Library working normal.

Author: Mahtem

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "chrome",
+            "request": "launch",
+            "name": "Launch Chrome against localhost",
+            "url": "http://localhost:8080",
+            "webRoot": "${workspaceFolder}"
+        }
+    ]
+}

debugging/book-library/index.html

@@ -91,6 +91,6 @@ <h1>Library</h1>
       </tbody>
     </table>
 
-    <script src="script.js"></script>
+  <script type="module" src="script.js"></script>
   </body>
 </html>

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",
@@ -28,21 +28,56 @@ 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() {
+  // Letters + spaces only (authors)
+  const lettersOnly = /^[A-Za-z\s]+$/;
+
+  // Title: letters + numbers + spaces (no special characters)
+  const titleAllowed = /^[A-Za-z0-9\s]+$/;
+
+  // Empty field check
   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();
   }
+
+  // Title validation
+  if (!titleAllowed.test(title.value)) {
+    alert("Title must contain only letters, numbers, and spaces!");
+    return false;
+  }
+
+  // Author validation
+  if (!lettersOnly.test(author.value)) {
+    alert("Author name must contain only letters!");
+    return false;
+  }
+
+  // Pages >= 1
+  let pagesNum = Number(pages.value);
+
+  if (isNaN(pagesNum) || pagesNum < 1) {
+    alert("Pages must be a number greater than or equal to 1!");
+    return false;
+  }
+
+  // Create and save the book
+  let book = new Book(title.value, author.value, pages.value, check.checked);
+  myLibrary.push(book);
+
+  // Clear inputs (optional)
+  title.value = "";
+  author.value = "";
+  pages.value = "";
+  check.checked = false;
+
+  render();
 }
 
+
 function Book(title, author, pages, check) {
   this.title = title;
   this.author = author;
@@ -53,8 +88,8 @@ 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 table rows (keep header row 0)
+  for (let n = rowsNumber - 1; n > 0; n--) {
     table.deleteRow(n);
   }
   //insert updated row and cells
@@ -72,11 +107,12 @@ function render() {
 
     //add and wait for action for read/unread button
     let changeBut = document.createElement("button");
-    changeBut.id = i;
+    changeBut.id = "read-btn-" + i;
     changeBut.className = "btn btn-success";
     wasReadCell.appendChild(changeBut);
     let readStatus = "";
-    if (myLibrary[i].check == false) {
+    // show "Yes" when check is true (read), otherwise "No"
+    if (myLibrary[i].check === true) {
       readStatus = "Yes";
     } else {
       readStatus = "No";
@@ -89,15 +125,19 @@ function render() {
     });
 
     //add delete button to every row and render again
-    let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    deleteCell.appendChild(delBut);
+    let delBut = document.createElement("button");
+    delBut.id = "del-btn-" + i;
     delBut.className = "btn btn-warning";
     delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    deleteCell.appendChild(delBut);
+
+    delBut.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();
     });
   }
 }
+
+
+// Book Library bugs fixed and Book Library working normal.