HTMLAreaElement: coords property
The coords property of the HTMLAreaElement interface specifies the coordinates of the element's shape as a list of floating-point numbers. It reflects the <area> element's coords attribute.
If the shape is rect, the shape is a rectangle and the string value's four comma separated numbers specify the coordinates of the top-left and bottom-right corners of the rectangle. For example, 0,0,200,20 defines the coordinates as 0,0, which is the top-left of the image map, and 200,20, which is 200px from the left and 20px from the top of the top-left corner of the image map.
If the shape is circle, the three comma-separated numbers represent the x and y coordinates of the circle's center and the radius.
If the shape is poly, the string consists of at least 6 comma-separated numbers representing at least 3 pairs of coordinates that define the vertices of the polygon.
For all coordinates, the origin is the top-left corner of the <map> element's image.
Value
A string; composed of a comma separated series of numbers.
Examples
const areaElement = document.getElementById("circleArea");
console.log(areaElement.coords);
areaElement.coords = "25,25,25";