Safari versions below v16.4 are unsupported #1687
Description
The bundled lib (see chai/chai.js on npm, L156-158) uses static initialization blocks that are only supported in newer browser versions: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Static_initialization_blocks .
This breaks support for Safari 14 and 15, which are supposed to be supported according to the release notes on v5: #1565 .
Changing the esbuild target to e.g. 'es2021' should fix this problem 🙂