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Ejemplo 1: cómo crear un juego en html
<!--ASIMPLESNAKEGAMEMADEBYHTMLANDCSS--><!DOCTYPE html><html><head><title></title><style>
html, body
height:100%;
margin:0;
body
background: black;
display: flex;
align-items: center;
justify-content: center;
canvas
border:1px solid white;</style></head><body><canvas width="400" height="400" id="game"></canvas><script>var canvas =document.getElementById('game');var context = canvas.getContext('2d');var grid =16;var count =0;var snake =
x:160,
y:160,// snake velocity. moves one grid length every frame in either the x or y direction
dx: grid,
dy:0,// keep track of all grids the snake body occupies
cells:[],// length of the snake. grows when eating an apple
maxCells:4;var apple =
x:320,
y:320;// get random whole numbers in a specific range// @see https://stackoverflow.com/a/1527820/2124254functiongetRandomInt(min, max)returnMath.floor(Math.random()*(max - min))+ min;// game loopfunctionloop()requestAnimationFrame(loop);// slow game loop to 15 fps instead of 60 (60/15 = 4)if(++count <4)return;
count =0;
context.clearRect(0,0,canvas.width,canvas.height);// move snake by it's velocity
snake.x+= snake.dx;
snake.y+= snake.dy;// wrap snake position horizontally on edge of screenif(snake.x<0)
snake.x= canvas.width- grid;elseif(snake.x>= canvas.width)
snake.x=0;// wrap snake position vertically on edge of screenif(snake.y<0)
snake.y= canvas.height- grid;elseif(snake.y>= canvas.height)
snake.y=0;// keep track of where snake has been. front of the array is always the head
snake.cells.unshift(x: snake.x, y: snake.y);// remove cells as we move away from themif(snake.cells.length> snake.maxCells)
snake.cells.pop();// draw apple
context.fillStyle='red';
context.fillRect(apple.x, apple.y, grid-1, grid-1);// draw snake one cell at a time
context.fillStyle='green';
snake.cells.forEach(function(cell, index)// drawing 1 px smaller than the grid creates a grid effect in the snake body so you can see how long it is
context.fillRect(cell.x, cell.y, grid-1, grid-1);// snake ate appleif(cell.x=== apple.x&& cell.y=== apple.y)
snake.maxCells++;// canvas is 400x400 which is 25x25 grids
apple.x=getRandomInt(0,25)* grid;
apple.y=getRandomInt(0,25)* grid;// check collision with all cells after this one (modified bubble sort)for(var i = index +1; i < snake.cells.length; i++)// snake occupies same space as a body part. reset gameif(cell.x=== snake.cells[i].x&& cell.y=== snake.cells[i].y)
snake.x=160;
snake.y=160;
snake.cells=[];
snake.maxCells=4;
snake.dx= grid;
snake.dy=0;
apple.x=getRandomInt(0,25)* grid;
apple.y=getRandomInt(0,25)* grid;);// listen to keyboard events to move the snakedocument.addEventListener('keydown',function(e)// prevent snake from backtracking on itself by checking that it's // not already moving on the same axis (pressing left while moving// left won't do anything, and pressing right while moving left// shouldn't let you collide with your own body)// left arrow keyif(e.which===37&& snake.dx===0)
snake.dx=-grid;
snake.dy=0;// up arrow keyelseif(e.which===38&& snake.dy===0)
snake.dy=-grid;
snake.dx=0;// right arrow keyelseif(e.which===39&& snake.dx===0)
snake.dx= grid;
snake.dy=0;// down arrow keyelseif(e.which===40&& snake.dy===0)
snake.dy= grid;
snake.dx=0;);// start the gamerequestAnimationFrame(loop);</script></body></html>Ejemplo 2: javascript haciendo un juego de etiquetas
(function)game=tag(function)=character=109(function)=vehicles=200Si posees alguna desconfianza o capacidad de arreglar nuestro reseña puedes añadir un exégesis y con mucho gusto lo estudiaremos.
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