SVGGeometryElement.isPointInStroke()

The SVGGeometryElement.isPointInStroke() method determines whether a given point is within the stroke shape of an element. Normal hit testing rules apply; the value of the pointer-events property on the element determines whether a point is considered to be within the stroke. The point argument is interpreted as a point in the local coordiante system of the element.

boolean someElement.isPointInStroke(DOMPointInit point);

point

A DOMPointInit interpreted as a point in the local coordinate system of the element.

A boolean indicating whether the given point is within the stroke or not.

<svg viewBox="0 0 100 100" width="150" height="150"
    xmlns="http://www.w3.org/2000/svg">
  <circle id="circle" cx="50" cy="50" r="45"
      fill="white" stroke="black" stroke-width="10"/>

  <circle cx="10" cy="10" r="5" fill="seagreen"/>
  <circle cx="40" cy="30" r="5" fill="seagreen"/>
  <circle cx="83" cy="17" r="5" fill="seagreen"/>
</svg>

var circle = document.getElementById('circle');

// Point not in circle
console.log('Point at 10,10:', circle.isPointInStroke(new DOMPoint(10, 10)));

// Point in circle but not stroke
console.log('Point at 40,30:', circle.isPointInStroke(new DOMPoint(40, 30)));

// Point in circle stroke
console.log('Point at 83,17:', circle.isPointInStroke(new DOMPoint(83, 17)));