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How to save HTML Canvas as image using canvas.toDataURL()?

王林
王林forward
2023-08-28 20:41:131273browse

如何使用canvas.toDataURL()将HTML Canvas保存为图像?

Use the toDataURL() method to get the image data URL of the canvas. It converts the drawing (canvas) to a 64-bit encoded PNG URL.

Example

You can try running the following code to save the canvas as an image −

<!DOCTYPE HTML>
<html>
   <head>
   </head>
   <body>
      <canvasid = "newCanvas" width = "450" height = "300"></canvas>
      <script>
         var canvas = document.getElementById(&#39;newCanvas&#39;);
         var ctx = canvas.getContext(&#39;2d&#39;);
         // draw any shape
         ctx.beginPath();
         ctx.moveTo(120, 50);
         ctx.bezierCurveTo(130,100, 130, 250, 330, 150);
         ctx.bezierCurveTo(350,180, 320, 180, 240, 150);
         ctx.bezierCurveTo(320,150, 420, 120, 390, 100);
         ctx.bezierCurveTo(130,40, 370, 30, 240, 50);
         ctx.bezierCurveTo(220,7, 350, 20, 150, 50);
         ctx.bezierCurveTo(250,5, 150, 20, 170, 80);
         ctx.closePath();
         ctx.lineWidth = 3;
         ctx.fillStyle =&#39;#F1F1F1&#39;;
         ctx.fill();
         ctx.stroke();
         var dataURL =canvas.toDataURL();
      </script>
   </body>
</html>

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