Don't let child element become larger than parent

[kantuni]

For height and width changes use MutationObserver.

[kantuni]

For text elements, wrap the text node in a <span> element and control it's width and height change.

[kantuni]

https://davidwalsh.name/mutationobserver-api

[kantuni]

https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver