You should put your component between an enclosing tag, Which means: // WRONG! return ( <Comp1 /> <Comp2 /> ) Instead: // Correct return ( <div> <Comp1 /> <Comp2 /> </div> ) Edit: Per Joe Clay’s comment about the Fragments API // More Correct return ( <React.Fragment> <Comp1 /> <Comp2 /> </React.Fragment> ) // Short … Read more
In redux-saga, the equivalent of the above example would be export function* loginSaga() { while(true) { const { user, pass } = yield take(LOGIN_REQUEST) try { let { data } = yield call(request.post, ‘/login’, { user, pass }); yield fork(loadUserData, data.uid); yield put({ type: LOGIN_SUCCESS, data }); } catch(error) { yield put({ type: LOGIN_ERROR, error … Read more
Just children: React.ReactNode.
Much like .setState() in class components created by extending React.Component or React.PureComponent, the state update using the updater provided by useState hook is also asynchronous, and will not be reflected immediately. Also, the main issue here is not just the asynchronous nature but the fact that state values are used by functions based on their … Read more
React makes this even easier for you. Instead of defining selected on each option, you can (and should) simply write value={optionsState} on the select tag itself: <select value={optionsState}> <option value=”A”>Apple</option> <option value=”B”>Banana</option> <option value=”C”>Cranberry</option> </select> For more info, see the React select tag doc. Also, React automatically understands booleans for this purpose, so you can … Read more
The React docs says: Treat this.state as if it were immutable. Your push will mutate the state directly and that could potentially lead to error prone code, even if you are “resetting” the state again afterwards. For example, it could lead to that some lifecycle methods like componentDidUpdate won’t trigger. The recommended approach in later … Read more
In order to setState for a nested object you can follow the below approach as I think setState doesn’t handle nested updates. var someProperty = {…this.state.someProperty} someProperty.flag = true; this.setState({someProperty}) The idea is to create a dummy object perform operations on it and then replace the component’s state with the updated object Now, the spread … Read more
I use ES6 template literals. For example: const error = this.state.valid ? ” : ‘error’ const classes = `form-control round-lg ${error}` And then just render it: <input className={classes} /> One-liner version: <input className={`form-control round-lg ${this.state.valid ? ” : ‘error’}`} />
Here are two options now – 1. Try to uninstall Node.js version 17+ and reinstall Node.js version 16+ You can re install the current LTS Node.js version from their official site. Or more specific downloads from here; You can use NVM (Node Version Manager) Linux and Mac users can use this nvm package – https://github.com/nvm-sh/nvm … Read more
There aren’t a lot of “Best Practices” yet. Those of us that are using inline-styles, for React components, are still very much experimenting. There are a number of approaches that vary wildly: React inline-style lib comparison chart All or nothing? What we refer to as “style” actually includes quite a few concepts: Layout — how … Read more