It depends.

To generate the output data, run:

npm run build

output has the following subdirectories:

• output/delta contains one file per Unicode version that changes the JavaScript identifier grammar.
• output/test262 contains Test262 tests based on the same data, which can be upstreamed to, respectively:
  • identifiers → the test/language/identifiers/ directory
  • unicodeSets → the test/built-ins/RegExp/unicodeSets/generated/ directory
• output/web is a small web app that lists Unicode version support across various JavaScript features in major browsers.