fill-rule property

Sets or retrieves a value that indicates the algorithm that is to be used to determine what parts of the canvas are included inside the shape.

Syntax

fill-rule: nonzero | evenodd | inherit

nonzero: Default. This rule determines where within the canvas a point falls, or the point's insideness, in relation to the canvas. The location of the point by drawing a ray from that point to infinity in any direction and then examining the places where a segment of the shape crosses the ray. Starting with a count of zero, add one each time a path segment crosses the ray from left to right and subtract one each time a path segment crosses the ray from right to left. After counting the crossings, if the result is zero then the point is outside the path. Otherwise, it is inside.
evenodd: This rule determines the "insideness" of a point on the canvas by drawing a ray from that point to infinity in any direction and counting the number of path segments from the given shape that the ray crosses. If this number is odd, the point is inside; if even, the point is outside.
inherit: Indicates that the property takes the same computed value as the property for the element's parent.

Applies To	shapes and text content elements
Media	visual
Inherited	no
Initial Value	nonzero

As of Microsoft Edge, this presentation attribute is animatable with CSS Animations and CSS Transitions.