Closed
Description
Reference: https://www.w3.org/TR/hr-time/#tojson-method
There are WPT for it but they are currently written in HTML: https://github.com/web-platform-tests/wpt/blob/79fa4cf76e0d39e3fc1b7ead85e067b0a064b892/hr-time/performance-tojson.html