Skip to main content

Interactive Monster Search with JavaScript

Welcome to this step-by-step tutorial on building an interactive monster search using JavaScript! If you have moderate experience with JavaScript, you're in the right place. By the end of this tutorial, you'll have a simple web application that allows users to search for and view Dungeons & Dragons 5th Edition (D&D 5e) monsters.

✅ Learning Objectives

  1. Learn to make a simple HTML webpage
  2. Learn to interact with the API using HTTP requests in Javascript
  3. Learn to create a form that allows users to get monsters from the API

Setting Up the Project

  1. Create a New Directory: Start by creating a new directory for your project. You can name it something like "monster-search-app".

  2. Initialize a Node.js Project: Open your terminal, navigate to the project directory, and run the following command to initialize a Node.js project:

    npm init -y
  3. Install Axios: Axios is a library for making HTTP requests. Install it by running the following command:

    npm install axios
  4. Create Files: Inside your project directory, create three files: index.html, styles.css, and script.js.

Building the Frontend


Let's start by creating the HTML structure for our web application:

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="styles.css" />
<title>Monster Search</title>
<div class="container">
<h1>Monster Search</h1>
<input type="text" id="monsterInput" placeholder="Enter a monster name" />
<button id="searchButton">Search</button>
<div id="monsterResult" class="monster-result"></div>
<script src="script.js"></script>


Let's style our web application to make it visually appealing:

body {
font-family: Arial, sans-serif;
background-color: #f0f0f0;
margin: 0;
padding: 0;
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;

.container {
background-color: white;
border-radius: 8px;
padding: 20px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
text-align: center;

h1 {
color: #333;

#monsterInput {
width: 100%;
padding: 8px;
margin-bottom: 10px;
border: 1px solid #ccc;
border-radius: 4px;

#searchButton {
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
padding: 8px 12px;
cursor: pointer;

.monster-result {
margin-top: 20px;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
text-align: left;

Adding Functionality with JavaScript


Now, let's add the functionality to our web application using JavaScript:

const monsterInput = document.getElementById("monsterInput");
const searchButton = document.getElementById("searchButton");
const monsterResult = document.getElementById("monsterResult");

searchButton.addEventListener("click", () => {
const monsterName = monsterInput.value.toLowerCase();
if (monsterName) {
} else {
monsterResult.innerHTML = "Please enter a monster name.";

function searchMonster(monsterName) {
monsterResult.innerHTML = "Searching...";

.then((response) => {
const monsters =;
const matchedMonster = monsters.find(
(monster) => === monsterName

if (matchedMonster) {
.then((monsterResponse) => {
const monsterData =;
monsterResult.innerHTML = `
<p><strong>Index:</strong> ${monsterData.index}</p>
<!-- You can display more monster details here -->
.catch((error) => {
monsterResult.innerHTML = "Error fetching monster details.";
} else {
monsterResult.innerHTML = "Monster not found.";
.catch((error) => {
monsterResult.innerHTML = "Error fetching monsters.";

Testing the Application

  1. Open your terminal and navigate to the project directory.

  2. Run the following command to start a simple server:

    npx serve
  3. Visit http://localhost:5000 in your web browser to see the monster search application in action.


Congratulations! You've successfully built an interactive monster search web application using JavaScript, HTML, and CSS. Users can now search for D&D 5e monsters and view their details.