HomeJavaScript GamesNumber Guessing Game in HTML CSS & JavaScript

Number Guessing Game in HTML CSS & JavaScript

Create Game in HTML CSS & JavaScript

You might have played various games, but were you aware that you can develop games using HTML, CSS, and JavaScript that can be played by both you and the computer or a bot?

Today in this blog post, I will teach you how to create a Game using HTML CSS, and JavaScript. Furthermore, I strongly believe that developing games is an excellent way to enhance your coding skills, as it requires using logic and problem-solving skills.

As you can see outlook at the image of the game that you will learn to create today. In this game, the computer or bot will randomly select a number that you will not know, and you have to guess the number based on the hints provided, with 10 chances to make the correct guess.

Video Tutorial of Number Guessing Game in JS

As you saw in this video tutorial of the number-guessing game. How I built a simple game in HTML CSS and JavaScript. As well as how we can play this game by guessing the exact number with hints.

I would highly recommend you watch the video tutorial of this game. I have tried to make you understand every line of code with comments. If you want to skip you may continue reading the blog.

Steps for Number Guessing Game in JavaScript

To create this Number Guessing Game, follow the given steps line by line:

  1. Create a folder. You can name this folder whatever you want, and inside this folder, create the mentioned files.
  2. Create an index.html file. The file name must be index and its extension .html
  3. Create a style.css file. The file name must be style and its extension .css
  4. Create a script.js file. The file name must be script and its extension .js
Once you create these files, paste the given codes into the specified files. If you don’t want to do these then scroll down and download all the source code files of the Number Guessing Game, by clicking on the given download button.

First, paste the following codes into your index.html file.

<!DOCTYPE html>
<!-- Coding By CodingNepal - codingnepalweb.com -->
<html lang="en">
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Game in HTML CSS & JavaScript</title>
    <link rel="stylesheet" href="style.css" />
    <div class="wrapper">
      <header>Guess a number from 1 to 100</header>
      <p class="guess"></p>
      <div class="input-field">
        <input type="number" />
      <p>You have <span class="chances">10</span> chances</p>

    <script src="script.js" defer></script>

Second, paste the following codes into your style.css file.

/* Import Google font - Poppins */
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap");
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #4a98f7;
.wrapper {
  padding: 30px 40px;
  border-radius: 12px;
  background: #fff;
  text-align: center;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
.wrapper header {
  font-size: 18px;
  font-weight: 400;
  color: #333;
.wrapper p {
  color: #333;
.wrapper .input-field {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 25px 0;
.input-field input,
.input-field button {
  height: 50px;
  width: calc(100% / 2 - 20px);
  outline: none;
  padding: 0 20px;
  border-radius: 8px;
  font-size: 18px;
.input-field input {
  text-align: center;
  color: #707070;
  width: 110px;
  border: 1px solid #aaa;
input::-webkit-outer-spin-button {
  display: none;
.input-field input:disabled {
  cursor: not-allowed;
.input-field button {
  border: none;
  background: #4a98f7;
  color: #fff;
  cursor: pointer;
  transition: 0.3s;
.input-field button:active {
  transform: scale(0.97);

Third, paste the following codes into your script.js file.

// Get the DOM elements and initialize the game
const input = document.querySelector("input"),
  guess = document.querySelector(".guess"),
  checkButton = document.querySelector("button"),
  remainChances = document.querySelector(".chances");

// Set the focus on input field

let randomNum = Math.floor(Math.random() * 100);
chance = 10;

// Listen for the click event on the check button
checkButton.addEventListener("click", () => {
  // Decrement the chance variable on every click
  // Get the value from the input field
  let inputValue = input.value;
  // Check if the input value is equal to the random number
  if (inputValue == randomNum) {
    // Update guessed number, disable input, check button text and color.
    [guess.textContent, input.disabled] = ["Congratulations", true];
    [checkButton.textContent, guess.style.color] = ["Replay", "#333"];
    //Check if input value is > random number and within 1-99 range.
  } else if (inputValue > randomNum && inputValue < 100) {
    // Update the guess text and remaining chances
    [guess.textContent, remainChances.textContent] = ["Your guess is high", chance];
    guess.style.color = "#333";
    //Check if input value is < random number and within 1-99 range.
  } else if (inputValue < randomNum && inputValue > 0) {
    // Update the guessed number text and remaining chances
    [guess.textContent, remainChances.textContent] = ["Your guess is low", chance];
    guess.style.color = "#333";
    // If the input value is not within the range of 1 to 99
  } else {
    // Update the guessed number text, color and remaining chances
    [guess.textContent, remainChances.textContent] = ["Your number is invalid", chance];
    guess.style.color = "#DE0611";
  // Check if the chance is zero
  if (chance == 0) {
    //Update check button, disable input, and clear input value.
    // Update guessed number text and color to indicate user loss.
    [checkButton.textContent, input.disabled, inputValue] = ["Replay", true, ""];
    [guess.textContent, guess.style.color] = ["You lost the game", "#DE0611"];
  if (chance < 0) {

If you face any difficulties while creating your Number Guessing Game or your code is not working as expected, you can download the source code files for this Number Guessing Game for free by clicking on the download button, and you can also view a live demo of this card slider by clicking on the view live button.

View Live Demo




Please enter your comment!
Please enter your name here

Recent Posts

Featured Post


AdBlock Detected