Update: Prompt, usePrompt and useBlocker have been removed from react-router-dom. This answer will not currently work, though this might change. The github issue, opened Oct 2021, is here The answer… This answer uses router v6. You can use usePrompt. usePrompt will show the confirm modal/popup when you go to another route i.e. on mount. A … Read more
The slice object returned from createSlice includes each of the individual case reducer functions you passed in as slice.caseReducers, to help with situations like this. So, you could do: addModule(state, action) { const { moduleName, renderingData } = action.payload; if (!state.modules[moduleName]) { state.modules[moduleName] = renderingData; } WorkspacesSlice.caseReducers.setActiveModule(state, action); }, Also, reducer functions have no this, … Read more
This issue only happens when react-native 0.57.2 is installed. It seems like the Metro Bundler has an issue resolving the paths when started from ./node_modules/react-native/scripts/packager.sh. Starting the Metro Bundler directly from the project directory works for me. Can someone let me know if it works for them too? # Clean cache rm -rf $TMPDIR/react-*; rm … Read more
I don’t know why you absolutly want a stateless component, while a stateful component with componentDidMount would do the job in a simple way. Dispatching actions in mapDispatchToProps is very dangerous and may lead to dispatching not only on mount but whenever ownProps or store props changes. Side effects are not expected to be done … Read more
To be able to understand how Provider and connect work we need to understand 2 concepts in React 1- Context api: Context is a way to pass data through the component tree without having to pass the props down manually at every level, you can learn more about context here 2- Higher Order Component (HOC): … Read more
Open “More Tools” -> “Task Manager” in Chrome. Open the twitter web app and find the tab in Task Manager. Mine started at 120MB. Start scrolling and see how long it takes to crack 500MB. I know it’s not directly related to data stored in Redux considering most of it is gifs, etc, but it … Read more
create .env file in your project file and add the following statement SKIP_PREFLIGHT_CHECK=true Save the file Remove node_modules, yarn.lock, package.lock Then reinstall node_modules with npm install This should work
The middleware option in configureStore accepts a callback function, and that callback will be given getDefaultMiddleware as its argument: const store = configureStore({ reducer: rootReducer, middleware: (getDefaultMiddleware) => getDefaultMiddleware().concat(logger), }) Use that instead of the separately imported version.
You want to initiate a timeout function inside a lifecycle method. Lifecycle methods are methods which call on, for example, mount and unmount (there are more examples but for the sake of explanation I will stop here) what you’re interested in is the mount lifecycle. In functional components, it can be accessed like this: import … Read more
As pointed out in the docs Verifies that children has only one child (a React element) and returns it. Otherwise this method throws an error. So now why is it helpful over just using props.children? The main reason is it’s throwing an error, thus halting the whole dev flow, so you cannot skip it. This … Read more