Rewrite library with TypeScript, update to modern React & Jest conventions

[charles4221]

• Rewrote the entire library from plain JavaScript to TypeScript
• Dropped support for end-of-life Node versions (below 20.x) and React versions (below 18.x)
• Replaced rollup with tsup for providing both ESM and CJS exports from one TypeScript source
• Removed prop-types in favour of colocated typings for React component props
• Upgraded eslint from v6 to v9, rewrote config as Flat Config, modernised ESLint config, plugins and rules
• Refactored all unit tests from the deprecated react-test-renderer to the industry standard @testing-library/react
• Upgraded all other development dependencies to latest versions as of 2025-07-29

[charles4221]

NOTE: this is currently targeting 0.2.x in order to show a proper diff between the existing code and my changes, however this upgrade would obviously be best as a major version bump.

I have (for now) included updates for the version from 0.2.3 to 1.0.0 however I am open to discussion around what the next major version should be (e.g. we could go with 0.3.0 or even 3.0.0)

[olmobrutall]

Looking forward for this merge. Is is published in npm already?

Thanks for the greate work @charles4221

[charles4221]

Looking forward for this merge. Is is published in npm already?

Thanks for the greate work @charles4221

@olmobrutall it is not published to npm yet as this is still a draft PR. It is 99% ready, we just need to have a discussion around what the next major version will be (e.g. 0.3.0, or 1.0.0, or 3.0.0)

I will be looking to take on maintainer duties for this repository but still need to discuss the details of that with the FontAwesome team before anything happens.

[robmadole]

Absolutely fantastic! Great attention to detail here.

I can't thank you enough @charles4221. I think and hope the community "reacts" well to this. (Sorry for the Dad joke)