Search function for a value in an array of objects

Question

I have tried to create a function which searches for the title in an array of book-objects. For some reason my code doesn't work, I have tried going through each step logically and in my mind it should be working.

let book = {
  title: "The 48 Laws of Power",
  author: "Robert Greene",
  numOfPages: 452,
  publisher: "Penguin Books",
  rating: "4.5 stars"
}

let book2 = {
  title: "How to Catch a Turkey",
  author: "Adam Wallace",
  numOfPages: 40,
  publisher: "",
  rating: "5 stars"
}

let book3 = {
  title: "Glitter Every Day: 365 Quotes from Women I Love",
  author: "Andy Cohen",
  numOfPages: 384,
  publisher: "Henry Holt and Co.",
  rating: "3 stars"
}

let bookArr = [book, book2, book3];
let searchBtn = document.getElementById('search-button');
let found = false;

let bookSearch = function() {
  found = false;
  let input = document.getElementById('book-search');
  for (i = 0; i < bookArr.length; i++) {
    if (input.value.toLowerCase == bookArr[i].title.toLowerCase) {
      found = true;
      break;
    }

  }
  if (found) {
    console.log(bookArr[i]);
  } else {
    console.log("The book was not found.");
  }
}
searchBtn.addEventListener('click', bookSearch);

<input type="text" id="book-search" placeholder="Search books...">
<button id="search-button">Search</button>
<script src="object.js"></script>

And lastly I'm new to this forum and also new to programming so I apologize if this is the wrong way of asking questions but I would really appreciate some criticism on my code and what I should do better. Thank you!

Answer 1

You can use Array.find() and it's as easy as:

var book = bookArr.find(book => book.title.toLowerCase() == input.value.toLowerCase())

Working Demo

let book = {
  title: "The 48 Laws of Power",
  author: "Robert Greene",
  numOfPages: 452,
  publisher: "Penguin Books",
  rating: "4.5 stars"
}

let book2 = {
  title: "How to Catch a Turkey",
  author: "Adam Wallace",
  numOfPages: 40,
  publisher: "",
  rating: "5 stars"
}

let book3 = {
  title: "Glitter Every Day: 365 Quotes from Women I Love",
  author: "Andy Cohen",
  numOfPages: 384,
  publisher: "Henry Holt and Co.",
  rating: "3 stars"
}

let bookArr = [book, book2, book3];
let searchBtn = document.getElementById('search-button');
let found = false;

let bookSearch = function() {
  let input = document.getElementById('book-search');
  var book = bookArr.find(book => book.title.toLowerCase() == input.value.toLowerCase())

  if (book) {
    console.log(book);
  } else {
    console.log("The book was not found.");
  }
}
searchBtn.addEventListener('click', bookSearch);

<input type="text" id="book-search" placeholder="Search books...">
<button id="search-button">Search</button>
<script src="object.js"></script>