The implementation involves unsafe monkey-patching:
1. For React, a hook is injected into every single component (!) regardless of whether it uses signals or not via __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.
2. For React, React.createElement is patched so that it can render signal values as Text nodes.
3. For Preact, they claim it's using a "pluggable renderer", yet they monkey-patch the global shouldComponentUpdate (and they don't call the old one so they break other patchy libraries)
1. For React, a hook is injected into every single component (!) regardless of whether it uses signals or not via __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.
2. For React, React.createElement is patched so that it can render signal values as Text nodes.
3. For Preact, they claim it's using a "pluggable renderer", yet they monkey-patch the global shouldComponentUpdate (and they don't call the old one so they break other patchy libraries)
[1] - https://github.com/preactjs/signals/blob/d25e8bac09c94ed3bad...
[2] - https://github.com/preactjs/signals/blob/d25e8bac09c94ed3bad...
[3] - https://github.com/preactjs/signals/blob/d25e8bac09c94ed3bad...