JavaScript BookList App

index.html

<div class="container mt-4">
    <h1 class="display-4 text-center">
      <i class="fas fa-book-open text-primary"></i> My<span class="text-primary">Book</span>List</h1>
      <form id="book-form">
        <div class="form-group">
          <label for="title">Title</label>
          <input type="text" id="title" class="form-control">
        </div>
        <div class="form-group">
          <label for="author">Author</label>
          <input type="text" id="author" class="form-control">
        </div>
        <div class="form-group">
          <label for="isbn">ISBN#</label>
          <input type="text" id="isbn" class="form-control">
        </div>
        <input type="submit" value="Add Book" class="btn btn-primary btn-block">
      </form>
      <table class="table table-striped mt-5">
        <thead>
          <tr>
            <th>Title</th>
            <th>Author</th>
            <th>ISBN#</th>
            <th></th>
          </tr>
        </thead>
        <tbody id="book-list"></tbody>
      </table>
  </div>

javascript-booklist-app.markdown

JavaScript BookList App

A Pen by Brad Traversy on CodePen.

License.

script.js

// Book Class: Represents a Book
class Book {
  constructor(title, author, isbn) {
    this.title = title;
    this.author = author;
    this.isbn = isbn;
  }
}

// UI Class: Handle UI Tasks
class UI {
  static displayBooks() {
    const books = Store.getBooks();

    books.forEach((book) => UI.addBookToList(book));
  }

  static addBookToList(book) {
    const list = document.querySelector('#book-list');

    const row = document.createElement('tr');

    row.innerHTML = `
      <td>${book.title}</td>
      <td>${book.author}</td>
      <td>${book.isbn}</td>
      <td><a href="#" class="btn btn-danger btn-sm delete">X</a></td>
    `;

    list.appendChild(row);
  }

  static deleteBook(el) {
    if(el.classList.contains('delete')) {
      el.parentElement.parentElement.remove();
    }
  }

  static showAlert(message, className) {
    const div = document.createElement('div');
    div.className = `alert alert-${className}`;
    div.appendChild(document.createTextNode(message));
    const container = document.querySelector('.container');
    const form = document.querySelector('#book-form');
    container.insertBefore(div, form);

    // Vanish in 3 seconds
    setTimeout(() => document.querySelector('.alert').remove(), 3000);
  }

  static clearFields() {
    document.querySelector('#title').value = '';
    document.querySelector('#author').value = '';
    document.querySelector('#isbn').value = '';
  }
}

// Store Class: Handles Storage
class Store {
  static getBooks() {
    let books;
    if(localStorage.getItem('books') === null) {
      books = [];
    } else {
      books = JSON.parse(localStorage.getItem('books'));
    }

    return books;
  }

  static addBook(book) {
    const books = Store.getBooks();
    books.push(book);
    localStorage.setItem('books', JSON.stringify(books));
  }

  static removeBook(isbn) {
    const books = Store.getBooks();

    books.forEach((book, index) => {
      if(book.isbn === isbn) {
        books.splice(index, 1);
      }
    });

    localStorage.setItem('books', JSON.stringify(books));
  }
}

// Event: Display Books
document.addEventListener('DOMContentLoaded', UI.displayBooks);

// Event: Add a Book
document.querySelector('#book-form').addEventListener('submit', (e) => {
  // Prevent actual submit
  e.preventDefault();

  // Get form values
  const title = document.querySelector('#title').value;
  const author = document.querySelector('#author').value;
  const isbn = document.querySelector('#isbn').value;

  // Validate
  if(title === '' || author === '' || isbn === '') {
    UI.showAlert('Please fill in all fields', 'danger');
  } else {
    // Instatiate book
    const book = new Book(title, author, isbn);

    // Add Book to UI
    UI.addBookToList(book);

    // Add book to store
    Store.addBook(book);

    // Show success message
    UI.showAlert('Book Added', 'success');

    // Clear fields
    UI.clearFields();
  }
});

// Event: Remove a Book
document.querySelector('#book-list').addEventListener('click', (e) => {
  // Remove book from UI
  UI.deleteBook(e.target);

  // Remove book from store
  Store.removeBook(e.target.parentElement.previousElementSibling.textContent);

  // Show success message
  UI.showAlert('Book Removed', 'success');
});

styles

<link href="https://use.fontawesome.com/releases/v5.6.3/css/all.css" rel="stylesheet" />
<link href="https://bootswatch.com/4/yeti/bootstrap.min.css" rel="stylesheet" />