The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `Touchscreen` class.
Not every `touchMove` call results in a `touchmove` event being emitted, depending on the browser's optimizations. For example, Chrome [throttles](https://developer.chrome.com/blog/a-more-compatible-smoother-touch/#chromes-new-model-the-throttled-async-touchmove-model) touch move events.