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<!DOCTYPE html> <html> <head><meta http-equiv="content-security-policy" content="script-src 'none'"> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <style> canvas { border:1px solid #d3d3d3; background-color: #f1f1f1; } </style> </head> <body onload="startGame()"> <script> var myGamePiece; function startGame() { myGamePiece = new component(30, 30, "red", 10, 120); myGameArea.start(); } var myGameArea = { canvas : document.createElement("canvas"), start : function() { this.canvas.width = 480; this.canvas.height = 270; this.context = this.canvas.getContext("2d"); document.body.insertBefore(this.canvas, document.body.childNodes[0]); this.interval = setInterval(updateGameArea, 20); }, clear : function() { this.context.clearRect(0, 0, this.canvas.width, this.canvas.height); } } function component(width, height, color, x, y) { this.width = width; this.height = height; this.speedX = 0; this.speedY = 0; this.x = x; this.y = y; this.update = function() { ctx = myGameArea.context; ctx.fillStyle = color; ctx.fillRect(this.x, this.y, this.width, this.height); } this.newPos = function() { this.x += this.speedX; this.y += this.speedY; } } function updateGameArea() { myGameArea.clear(); myGamePiece.newPos(); myGamePiece.update(); } function moveup() { myGamePiece.speedY = -1; } function movedown() { myGamePiece.speedY = 1; } function moveleft() { myGamePiece.speedX = -1; } function moveright() { myGamePiece.speedX = 1; } function clearmove() { myGamePiece.speedX = 0; myGamePiece.speedY = 0; } </script> <div style="text-align:center;width:480px;"> <button onmousedown="moveup()" onmouseup="clearmove()" ontouchstart="moveup()">UP</button><br><br> <button onmousedown="moveleft()" onmouseup="clearmove()" ontouchstart="moveleft()">LEFT</button> <button onmousedown="moveright()" onmouseup="clearmove()" ontouchstart="moveright()">RIGHT</button><br><br> <button onmousedown="movedown()" onmouseup="clearmove()" ontouchstart="movedown()">DOWN</button> </div> <p>Якщо натиснути кнопку, червоний квадрат почне рухатися. Рух припиниться, коли ви припините натискати кнопку.</p> <p>Ми додали подію ontouchstart на кнопки, щоб цей приклад працював на сенсорних пристроях.</p> </body> </html>