<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<canvas id="canvas" width="400" height="400" style="display:block; margin:0 auto; border:1px solid #ccc;"></canvas>
<script>
var canvas=document.getElementById('canvas');
var context=canvas.getContext('2d');
var width=canvas.width;
var height=canvas.height;
window.οnlοad= function () {
context.fillStyle="black";
context.fillRect(0,0,width,height);
canvas.addEventListener("mousemove",draw);
canvas.addEventListener("mouseout",hide)
};
function draw(event){
var x=event.clientX-canvas.getBoundingClientRect().left;
var y=event.clientY-canvas.getBoundingClientRect().top;
context.clearRect(0,0,width,height);
context.fillStyle="black";
context.fillRect(0,0,width,height);
context.save();
context.beginPath();
context.arc(x,y,100,0,2*Math.PI);
context.fillStyle="white";
context.fill();
context.clip();
context.font="bold 40px Arial";
context.fillStyle="#058";
context.textAlign="center";
context.textBaseLine="middle";
context.fillText("我們永遠在一起",width/2,height/2);
context.restore();
}
function hide(){
context.clearRect(0,0,width,height);
context.fillStyle="black";
context.fillRect(0,0,width,height);
}
</script>
</body>
</html>Html 5 小驚喜
發表評論
所有評論
還沒有人評論，想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.