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JS+H5+canvas drawing picture tutorial

php中世界最好的语言Original: 2018-04-18 11:44:151130browse

This time I will bring you a JS H5 canvas drawing picture tutorial, what are the precautions for drawing pictures on JS H5 canvas, the following is a practical case, let’s take a look one time.

demo.js

window.onload=function() {
  createcanvas();
  drawImage();
}
 function createcanvas() {
   var CANVAS=document.getElementById('mycanvas');
   context=CANVAS.getContext('2d');
 }
function drawImage() {
  var img=new Image();
  img.onload=function() {
    context.drawImage(img,0,0,200,200 );
  }
  img.src="img5.jpg";
}

demo.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>canvas</title>
 
  <script type="text/javascript" src="demo.js"></script>
</head>
<body>
  <canvas id="mycanvas"  width="400" hight="400" >
<span>你的浏览器不支持canvas</span>
</canvas>
</body>
</html>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

JS+H5+canvas drawing picture tutorial

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