gistlib - create the original mario game in javascript in javascript

One way to create the original Mario game in JavaScript would be to use the HTML5 canvas element to render a 2D game world. Here are the general steps to create such a game:

Set up the canvas element on a webpage using HTML/CSS.


index.tsx
<canvas id="game" width="640" height="480"></canvas>
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Create a JavaScript file and connect it to the HTML file with a script tag.


index.tsx
<script src="game.js"></script>
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In the JavaScript file, create a game loop using the requestAnimationFrame() method. This loop will continuously update the game world and render it to the canvas.


index.tsx
function gameLoop() {
  // update game world
  // render game world to canvas
  requestAnimationFrame(gameLoop);
}

requestAnimationFrame(gameLoop);
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Create a player character (Mario) using an image sprite. Display the sprite on the canvas and add movement controls to allow the player to move Mario around the game world.


index.tsx
class Player {
  constructor(x, y) {
    this.x = x;
    this.y = y;
    this.sprite = new Image();
    this.sprite.src = "mario-sprite.png";
  }

  moveRight() {
    this.x += 5;
  }

  // other movement methods for left, jump, etc.
}

const player = new Player(0, 0);

function render() {
  // clear canvas
  // draw player sprite
}

function update() {
  // update player position based on user input or game events
}

function gameLoop() {
  update();
  render();
  requestAnimationFrame(gameLoop);
}

document.addEventListener("keydown", event => {
  if (event.keyCode === 39) {
    player.moveRight();
  }
});

gameLoop();
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Create enemies and obstacles for Mario to avoid, and implement collision detection to determine when Mario collides with an enemy or obstacle.


index.tsx
class Enemy {
  constructor(x, y) {
    this.x = x;
    this.y = y;
    this.sprite = new Image();
    this.sprite.src = "enemy-sprite.png";
  }

  // other methods
}

const enemies = [new Enemy(100, 0), new Enemy(300, 0)];

function checkCollision(player, enemy) {
  // check for collision between player and enemy
  // return true or false
}

function update() {
  player.update();

  enemies.forEach(enemy => {
    enemy.update();

    if (checkCollision(player, enemy)) {
      gameOver();
    }
  });
}

function gameOver() {
  // end game and display score
}

gameLoop();
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Add sound effects and music using the HTML5 Audio API.


index.tsx
const jumpSound = new Audio("jump-sound.wav");
const music = new Audio("game-music.mp3");

document.addEventListener("keydown", event => {
  if (event.keyCode === 32) {
    jumpSound.play();
    player.jump();
  }
});

music.loop = true;
music.play();
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This is just a basic outline of the process involved in creating a game like Mario in JavaScript. There are many details and other features that could be added to make the game more polished and fun.

create the original mario game in javascript in javascript

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