The implementation is rather straight-forward. It uses std::panic::set_hook()
to install a panic hook which uses console.error() from JavaScript to log a
panic and the backtrace retrieved by creating a new Error().

The code is also thoroughly documented using both rustdocs and comments and
explains possible edge cases due to browser differences.

This is a really high quality crate!

The library implements graphical primitives, so there's no use of unsafe.
Where applicable, the author has quoted sources (e.g. "approximation taken
from http://example.com/") and made explicit comments in regards to accuracy
and assumptions made. A lot of code has direct links to academic research,
and it's obvious the author has gone to great lengths to ensure good
algorithmic complexity (most operations are constant time where possible, no
use of loops to brute-force a solution, etc.).