HTML5 Game - Drawing a Filled Shape

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  3. Canvas
  4. Drawing Using Paths

Introduction

You can draw closed paths that are filled by a color.

The following code draws a triangle that is filled with blue color.

Demo

ResultView the demo in separate window 

<!DOCTYPE html>
<html lang="en">
 <head> 
  <meta charset="UTF-8"> 
  <title>HTML5 Canvas</title> 
  <script type="text/javascript">
    window.onload = function(){/*  www  . j a  va  2  s  . c  o m*/
        let canvas = document.getElementById("myCanvas");
        let context = canvas.getContext("2d");
        // draw stuff here
         context.beginPath(); 
         context.moveTo(50,20); 
         context.lineTo(50,100); 
         context.lineTo(150, 100); 
         context.closePath(); 
         context.lineWidth = 10; 
         context.strokeStyle = 'red'; 
         context.fillStyle = 'blue'; 
         context.stroke(); 
         context.fill(); 

        
    };
</script> 
 </head> 
 <body> 
  <canvas id="myCanvas" width="300" height="200"></canvas>   
 </body>
</html>

Note

The closePath() method closes a path by joining the start point and the end point of the last drawing operation.

To draw a triangle, draw only two lines using lineTo().

Calling closePath() draws the third side of the triangle.

You used the stroke() method to draw an outline of a shape.

The fill() method fills the shape with a color.

The strokeStyle and fillStyle properties can be used to specify a color.

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