Inconsistent anchoring in regex

[romainmenke]

https://github.com/juggle/resize-observer/blob/05c6ede94c9f84eef328474edbb426e615d7e51a/src/algorithms/calculateBoxSize.ts#L17

Was it intentional that only tb is anchored and that vertical is not, or should the regex be : /^tb|^vertical/?

[TremayneChrist]

This is not intentional. Good find.