Never lose at Dino Runner

dino.js

/**
 * 1. Open your browser's console 
 * 2. Turn off your internet connection (or press `⌘ + P` or `ctrl + P` and write 'Offline')
 * 3. Paste the code in the "console" section
 * 4. Start the game
 * 5 🌵 🦖
 */

const game = Runner.instance_;

(function tick() {

    if (game.crashed || game.paused)
        return requestAnimationFrame(tick);
  
    const obstacles = game.horizon.obstacles;

    if (obstacles.length) {

        const tRex            = game.tRex
            , tRexWidth       = tRex.config.WIDTH
            , obstacle        = obstacles[0]
            , obstacleWidth   = obstacles[0].width
            , obstacleHeight  = obstacles[0].typeConfig.height
            , gravity         = game.config.GRAVITY
            , safety          = 2 * game.currentSpeed
            , jumpHeight      = obstacleHeight + safety
            , jumpVelocityY   = Math.sqrt(2 * gravity * jumpHeight)
            , jumpAngle       = 60 * Math.PI / 180
            , jumpVelocity    = jumpVelocityY / Math.sin(jumpAngle)
            , jumpDistance    = safety + Math.pow(jumpVelocity, 2) * Math.sin(2 * jumpAngle) / gravity;
            
            
        if (obstacle.xPos - tRex.xPos - tRexWidth <= 0.5 * (jumpDistance - obstacleWidth)) {

            if (obstacle.yPos > 75 && !tRex.jumping )
                pressKey(38) && (tRex.jumpVelocity = -jumpVelocityY);

            if (obstacle.yPos === 75 && !tRex.ducking) 
                pressKey(40);

        }
        
    }
    
    requestAnimationFrame(tick);

}());

const dispatchKeyEvent = function(eventName, keyCode) {

    const e = new Event(eventName);
    e.keyCode = keyCode;
    document.dispatchEvent(e);

}

const pressKey = (keyCode) => {
    
    dispatchKeyEvent('keydown', keyCode);
    setTimeout( () => dispatchKeyEvent('keyup', keyCode), 300 );

}

Jumpy.mp4