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Ultimate Guide to JavaScript Game Development

JavaScript games are entertaining, simple to create, and a terrific method for youngsters to learn how to code. JavaScript is a well-known computer language that can be found on almost every page on the internet. When you add JavaScript to a web application, it may bring animations and interactions to life, making surfing and playing games even more enjoyable.

The potential of JavasScript to create games that can be easily played on the web is a popular topic that attracts students to learning how to program with it. With the advancement of internet connections and computer hardware, it’s no surprise that game creators have been employing JavaScript to create new content over the previous decade.

Is JavaScript Good for Game Development?

Now that you know JavaScript can be used to create games, you might wonder if it’s up to the task.

Yes! Depending on the type of game you want to make, JavaScript is a fantastic language to use. For web-based and mobile games, JavaScript is the ideal option. It’s also an excellent language for kids to learn because it’s generally simple to grasp and has a wealth of online resources for coders. We recommend that middle school and high school students learn JavaScript as part of their coding classes.

JavaScript games may be played in the browser or on a mobile phone, so they’re a great choice if that’s your goal. Platforms and technologies can aid in the creation of both 2D and 3D content.

On the other hand, if you want to use JavaScript to create the next huge AAA game like Call of Duty or FIFA, you might find it difficult. Despite its versatility, JavaScript is much slower and uses far more memory than languages like C++. Advanced games necessitate intensive GPU calculations, which is a significant amount of weight to transport that JavaScript isn’t designed to handle.

JavaScript vs Java for Game Development

People frequently compare JavaScript with Java, and even mistakenly use the two terms interchangeably. In reality, JavaScript and Java are unrelated, with the only thing they have in common being that they are both programming languages with the term “Java” in their names.

While Java is a compiler language, JavaScript is an interpreted scripting language. Code does not need to be compiled because it is an interpreted scripting language. Instead, a user’s command interprets the results. This is why it is so effective when building websites. On a website, users frequently click around and scroll, providing data that JavaScript can utilize to perform an action.

Java, on the other hand, demands that code be built before it can be executed. That is, the code gets converted to a machine language that the computer can comprehend.

Now that it’s out of the way, what are the gaming possibilities for these languages? Again, if you want to build web browser games, JavaScript might be the best option. However, if you want to make a game that can run on a PC or console, Java would be a better choice. Minecraft, a popular Java-based game, is one of the most popular.

What Are the Best JavaScript Game Engines

JavaScript code is all text, and while it’s powerful, it’s not capable of doing everything on its own. It’s fairly typical to use a game engine or renderer library while designing games with JavaScript. Children who learn to include game engines into their programs will be one step closer to realizing their ideal game.

Game engines are pieces of software that let you add extra features to your games including sound, animations, visuals, and physics. When it comes to choosing a game engine or rendering library for your game, you have a lot of alternatives. Here are a few popular examples from which to choose.


PixiJS is an open-source engine that boasts a fast and attractive API. The 2D renderer is also cross-platform, allowing you to create games for a variety of platforms. Being open-source also allows a large and enthusiastic community to contribute to the engine’s continuous growth.


BabylonJS is a rendering toolkit with a rich set of capabilities that let you make everything from simple animations to full-fledged 3D games. BabylonJS, like PixiJS, is open-sourced and supported by a wide community of developers.


Phaser supports HTML5 games on both the desktop and mobile platforms. Its main focus is on creating 2D games that can be built for a variety of platforms. The possibility to use additional plugins as needed is one of Phaser’s advantages. This permits you to keep your tools small so that you don’t have too many extra parts.

Step 1 — Select a Code Editor

To get started, head over to an editor of your choice. The examples shown here will be using our CodeWizardsHQ editor.

Step 2 — Build a Game Canvas

The first line of code we write will create a game canvas. The height and width can be adjusted as needed. There are four steps to accomplish this.

Within the style>/style> tags, paste your canvas code.
Within your script>/script> tags, create your startGame function and establish your variables and getCanvas.
In the body>/body> tags, call startGame onload.
Use a h1>/h1> tag within the body>/body> element to provide a title if desired.
Our game’s title, Block Hopper, should appear in a light blue rectangle. Our game’s setting will be this.

Note: All code you write after this step will go inside the Script>/Script> tags.

Step 3 — Code Your Player, The Hopper

Let’s now add our player. This will be accomplished in four steps.

  1. Create the player variable.
  2. Create a variable to store the player’s Y position.
  3. Create a function called createPlayer() with width, height, and x-position parameters.
  4. In startGame(), we use the method from step 3 to create our player and assign it to the variable we defined in step 1.

Step 4 — Add Gravity to Your Player

Let’s give the player a sense of gravity. The steps are as follows.

  1. Make a fallSpeed variable.
  2. Make a new interval and save it in a variable that will be used to invoke the updateCanvas() function.
  3. Create two functions for our player: one for drawing and one for moving.
  4. Make a function called updateCanvas() that clears the canvas and redraws the player.

Step 5 — Add Code Functionality to Your Player

Our player is falling, but we want it to come to a halt as soon as it lands. Within your createPlayer() function, add the stopPlayer() function. Then, at the end of movePlayer, call the function ().

Step 6 — Code Jump Logic for Your Player

Now, when we push the space bar, our player will jump.

  1. Create a jumpSpeed property and an isJumping boolean.
  2. Within your createPlayer() function, add a jump() function.
  3. Make a change to our makeFall() function.
  4. Inside updateCanvas, call our jump() function ().
  5. Make a method called resetJump().
  6. Once we push the spacebar, toggle the isJumping boolean and run resetJump().

Step 7 — Build the Attack Block

It’s time to build a defense against you. This will be similar to constructing the player, but our block’s characteristics will be randomly generated.

  1. Create a new block variable and use the createBlock() function to construct a new block.
  2. Assign a value from createBlock to the block variable ()
  3. Inside startGame(), call the function and attach it to your variable.
  4. Make a method called randomNumber().
  5. Assign random numbers for width, height, and speed to your createBlock() function. Then construct two functions: draw() and attackPlayer().
  6. Call block in updateCanvas().Draw() and block are two functions that can be used together.attackPlayer();

Step 8 — Add Logic to Move Your Player

Great! Our block now goes to assault our player, but it never returns once it reaches the edge of the screen. Let’s get this straightened out.

  1. Create a function called returnToAttackPostion() inside createBlock()
  2. Reset the block’s width, height, speed, and x and y values.
  3. At the end of the attack, call the new function.

Step 9 — Collision

We must finish the game when the block successfully strikes the player. It’s time to develop a detectCollision() function that will bring the game to a halt if there is a collision. In your updateCanvas() function, call the detectCollision() function.

Step 10 — Add a Score

For the grand finale, we will add a score to our game. This is done much the same way as creating shapes, except we will specify a fillText property and font.

  1. Create a score variable equal to 0 to start. While you’re there, create a scoreLabel variable to be used later.
  2. Create a createScoreLabel() function with a draw() function.
  3. Assign your scoreLabel a value with our createScoreLabel() function
  4. Call scoreLabel.draw() in updateCanvas()
  5. Increase your score once your block makes it to the end

Finish your very first JavaScript game!

And with that, you’ve completed your first JavaScript game. However, the greatest approach to improve your programming skills is to write your own code. Here are some other obstacles you might try to incorporate into your game.

  1. For an easy challenge, change a few of the variables such as fallSpeed or jumpSpeed. Play with it a bit until you get to a setting you like.
  2. For a medium-to-difficult challenge, create a new label on the other side of the screen that holds how many lives you have. Starting with three lives, you lose one every time you have a collision. Once you’re out of lives, then it’s game over!
  3. For a difficult challenge, add a new object in the game that gives you bonus points if you touch it. This will involve creating a new function to create the object and adding collision detection. It’s probably a good idea to make the object float, too!

Note:I’ll be posting a whole beginner’s tutorial soon so people may learn how to code.



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Konstantinos Gkizinos

Konstantinos Gkizinos

I am a programmer that can use C/C++ and java . I am trying to inprove everyday!