Please excuse a somewhat vague report as I’m just investigating a rather involved build system.
Our codebase has (a) a custom component base class, which is generally discouraged; and (b) HOCs that use the new forwardRef() functionality. This lead to a very strange breakage when I tried to migrate some components that currently use our internal BaseComponent to instead extend React.Component (or PureComponent) directly: our React Native app crashed in react-proxy’s update() function with the error 'Expected a constructor.'. It appears that when extending the React classes, the component ends up being not a class, but instead an object with the shape (per Chrome debugger)
{
$$typeof: Symbol(react.forward_ref),
render: forwardFn(props, ref) { ... }
}It’s not clear to me why this does not happen with our custom base class: I suppose forwardRef() treats it differently, being a full-blown ES6 class as opposed to what React provides. It’s also not clear to me exactly where I should be filing this bug: react-proxy, react-transform-hmr, metro, …? Any thoughts welcomed.
Please excuse a somewhat vague report as I’m just investigating a rather involved build system.
Our codebase has (a) a custom component base class, which is generally discouraged; and (b) HOCs that use the new
forwardRef()functionality. This lead to a very strange breakage when I tried to migrate some components that currently use our internalBaseComponentto instead extendReact.Component(orPureComponent) directly: our React Native app crashed in react-proxy’s update() function with the error'Expected a constructor.'. It appears that when extending the React classes, the component ends up being not a class, but instead an object with the shape (per Chrome debugger)It’s not clear to me why this does not happen with our custom base class: I suppose
forwardRef()treats it differently, being a full-blown ES6 class as opposed to what React provides. It’s also not clear to me exactly where I should be filing this bug:react-proxy,react-transform-hmr,metro, …? Any thoughts welcomed.