Unicode version support across JavaScript features & engines
34
stars
58
commits
JavaScript
primary language
Sep 29, 2025
updated
README
Can I Unicode‽
It depends.
Build
To generate the output data, run:
npm run build
output has the following subdirectories:
output/deltacontains one file per Unicode version that changes the JavaScript identifier grammar.output/test262contains Test262 tests based on the same data, which can be upstreamed to, respectively:identifiers→ thetest/language/identifiers/directoryunicodeSets→ thetest/built-ins/RegExp/unicodeSets/generated/directory
output/webis a small web app that lists Unicode version support across various JavaScript features in major browsers.
Contributors
mathiasbynens
58 commits
Similar repos
Languages
JavaScript
99.7%
Unicode version support across JavaScript features & engines
34
stars
58
commits
JavaScript
primary language
Sep 29, 2025
updated
README
Can I Unicode‽
It depends.
Build
To generate the output data, run:
npm run build
output has the following subdirectories:
output/deltacontains one file per Unicode version that changes the JavaScript identifier grammar.output/test262contains Test262 tests based on the same data, which can be upstreamed to, respectively:identifiers→ thetest/language/identifiers/directoryunicodeSets→ thetest/built-ins/RegExp/unicodeSets/generated/directory
output/webis a small web app that lists Unicode version support across various JavaScript features in major browsers.
Similar repos
Contributors
mathiasbynens
58 commits
Languages
JavaScript
99.7%