Canvas Examples -Using Paths

November 14, 2018 (Last Modified: June 30, 2019)

Fadıl

The beginPath the function starts a new path, and moveTo, lineTo, arcTo, arc, and similar methods are used to add segments to the path. The path can be closed using closePath. Once a path is created, you can use fill or stroke to render the path to the canvas.

&lt;html&gt;
 &lt;head&gt;
  &lt;script type="application/javascript"&gt;
function draw() {
  var canvas = document.getElementById("canvas");
  var ctx = canvas.getContext("2d");

  ctx.fillStyle = "red";

  ctx.beginPath();
  ctx.moveTo(30, 30);
  ctx.lineTo(150, 150);
  // was: ctx.quadraticCurveTo(60, 70, 70, 150); which is wrong.
  ctx.bezierCurveTo(60, 70, 60, 70, 70, 150); 
 // &lt;- this is right formula for the image on the right -&gt;
  ctx.lineTo(30, 30);
  ctx.fill();
}
   &lt;/script&gt;
 &lt;/head&gt;
 &lt;body onload="draw()"&gt;
   &lt;canvas id="canvas" width="300" height="300"&gt;&lt;/canvas&gt;
 &lt;/body&gt;
&lt;/html&gt;

Calling fill() or stroke() causes the current path to be used. To be filled or stroked again, the path must be recreated.