This project is likely to become stricter over time, which means mostly every update will be a breaking change.
This validator is designed to provide a common-sense validation experience for people writing HTML in Phlex. Sometimes that means being slightly stricter than the HTML specification. For example, there are some boolean attributes that also accept an empty string "" as a truthy value. The validator instead will require either true or false.
You can bypass validation by using String keys instead of Symbol keys.