dragonofdeath

**Describe the bug** element.getBoundingClientRect().toJSON() throws as its not implemented. getBoundingClientRect() returns [DOMRect](https://developer.mozilla.org/en-US/docs/Web/API/DOMRect) which inherits its properties from [DOMRectReadOnly](https://developer.mozilla.org/en-US/docs/Web/API/DOMRectReadOnly) and it has `toJSON` method, which is listed in mdn and is...