How to track element position when his parent is transformed.

[wyy2]

I have a container which is moved, rotated and scaled. Is it possible to get a child of this container global position?

In codepen example, blue target should point red circle.

See the Pen QWwLrmm by wyy2 (@wyy2) on CodePen

[OSUblake]

offsetLeft/Top don't include transforms. You can use getBoundingClientRect(), which includes transform.

 

However, getBoundingClientRect is axis aligned, so the rotated bounds might not be what you expect. Check out how the circle bounds changes.

 

See the Pen wRvjJL by osublake (@osublake) on CodePen

 

So it might be easier to use geBoundingClientRect on a point.

 

See the Pen 8b26bd5932fb8f6b9afb8d4131f8fd02 by osublake (@osublake) on CodePen

 

 

[wyy2]

Wow, didn't expect it will be one line of magic Thanks!