[Solved] How to get all corners of path?

user13314476 Asks: How to get all corners of path?
I have a SVG path.

How to get all extremum points from this path? (points of corners)?

I have tried to get all points using this:

Code:
 let totalLength = path.getTotalLength();

 for (var i = 0; i < totalLength; i++) {
    let point = path.getPointAtLength(i);
 }

For exmaple from this Path I need to get coordinates of 4 points, because it is rectangle:

Code:
<path id="f0" d="M1.825,-11.000 1.825,-363.650 710.925,-363.650 710.925,-11.000z"></path>

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