The docs said this, but the docs were wrong.Īction creators were never required to be pure functions. I searched the Redux repo for clues, and found that Action Creators were required to be pure functions in the past. You might want to check it out, and later pick what suits you the most. create-react-apps currently use Babel 6.26.0 for full support React.Fragment is. This moves the logic from action creators into sagas. React fragment shorthand failing to compile. Another interesting approach is Redux Saga which lets you define long-running daemons (âsagasâ) that take actions as they come, and transform or perform requests before outputting actions. But It does not work for attributes or keys. The downside is a little bit of indirection, but we believe itâs worth it in real applications.įinally, Redux Thunk and friends is just one possible approach to asynchronous requests in Redux apps. Shorthand React Fragment <></> works similar to .So the benefit of using middleware like Redux Thunk or Redux Promise is that components arenât aware of how action creators are implemented, and whether they care about Redux state, whether they are synchronous or asynchronous, and whether or not they call other action creators. If you need to change it to be synchronous, you can also do this without changing any calling code: // I can change it to be a regular action creator without touching callers With an explicit import of Fragment, however, flow does not complain. private/tmp/flow/flowlib_2349df3a/react.jsÄ¢55â +initializeTouchEvents: typeof initializeTouchEvents,Ä¢56â +checkPropTypes: typeof checkPropTypes,Ä¢58â +createElement: typeof createElement,Ä¢60â +createFactory: typeof createFactory,Ä¢61â +isValidElement: typeof isValidElement,Ä¢63â +PureComponent: typeof PureComponent, While it is supported in JSX syntax, it is not. It's working now with create-react-app v2 https. The React framework offers a shorthand syntax for fragment components that appears as an empty tag: <></>.Using react Fragments with either or the shorthand syntax like so import React from 'react'įlow complains with the following error (it's an indentical error for both, just showing output for ComponentA here) Cannot get React.Fragment because property Fragment is missing in object type. Best Solution I think this is a reason: screenshot create-react-apps currently use Babel 6.26.0 for full support React.Fragment is needed Babel v7.0.0-beta. React fragment shorthand failing to compile. Staying true to its fragment nature, the syntax is like a fragment itself, leaving only only empty brackets behind. I am using react v16.3.0 and flow-bin v0.69.0 There is a shorthand syntax when working with Fragments, which you can use.
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