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Showing content from https://webplatform.github.io/docs/apis/canvas/CanvasRenderingContext2D/isPointInPath below:

isPointInPath · WebPlatform Docs

Returns true if the point given by the x and y coordinates passed to the method, when treated as coordinates in the canvas coordinate space unaffected by the current transformation, is inside the intended path as determined by the non-zero winding number rule; returns false otherwise. If either of the arguments is infinite or NaN, then the method returns false.

Method of apis/canvas/CanvasRenderingContext2Dapis/canvas/CanvasRenderingContext2D

var object = object.isPointInPath(x, y);

Data-type

Number

The x-coordinate to test.

Data-type

Number

The y-coordinate to test.

Returns an object of type DOM NodeDOM Node

Type: VARIANT_BOOL

This method can return one of these values.

This example simply tests whether a given point is in the current path (the previously defined rectangle) and alerts true or false.

<canvas id="myCanvas" width="300" height="150" style="border:1px solid blue;"></canvas>
<p>. . .</p>
<script>
var can = document.getElementById("myCanvas");
var ctxt = can.getContext("2d");
ctxt.rect(20, 20, 150, 100);
alert(ctxt.isPointInPath(30,50));
</script>

W3C HTML Canvas 2D Context

W3C Candidate Recommendation

• Microsoft Developer Network: Windows Internet Explorer API reference Article

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