The animatedPoints read-only property of the SVGPolylineElement interface reflects the animated value of the element's points attribute. If the points attribute is not being animated, it contains the same value as the points property.
An SVGPointList object.
animatedPoints property<svg xmlns="http://www.w3.org/2000/svg" width="400" height="200">
<polyline
id="myPolyline"
points="100,10 150,50 100,90 50,50"
fill="none"
stroke="blue"
stroke-width="4">
<animate
attributeName="points"
values="100,10 150,50 100,90 50,50; 150,10 200,50 150,90 100,50"
dur="2s"
repeatCount="indefinite" />
</polyline>
</svg>const polylineElement = document.getElementById("myPolyline");
// Access the animatedPoints property
console.dir(polylineElement.animatedPoints); // Output: SVGPointList object