Having templates embedded in a close-to-JavaScript syntax yields a major benefit: it's generally easy to use JavaScript tooling with JSX, because JSX files can be transpiled by Babel. I'm not gonna lie, sometimes I miss a cleaner way to do an if statement in my templates, but overall,...
How would you use Observables in React? Using Observables in React is actually quite simple! Subscribing to an Observable is just a side effect, and like any other side effect, we can manage it using React’s powerful useEffect hook. Of course, there are many other ways that we need ...
A sneakier version of this problem has to do with refs. If we pass a ref as a prop, React won't be able to tell whether or not we've mutated it since the last render. And so it chooses to re-render, to be on the safe side. React's #1 goal is to make sure that the UI ...
To perform side effects after state has change, you must use theReact.useEffect hook. React.useEffect(callback, deps); React.useEffectaccepts a callback function to perform your side effects or actions, and it accepts a list of dependencies in the form of an array. That hook function will ...
import{Camera,getCameraFormat,useCameraDevice,useFrameProcessor}from'react-native-vision-camera';import{useEffect}from'react';import{StyleSheet,Text,View}from'react-native';import{StatusBar}from'expo-status-bar';exportdefaultfunctionApp(){constdevice=useCameraDevice('back');useEffect(()=>{constcamera...
"@react-navigation/native": "^6.0.0-next.15" Author plus24-library commented Jul 12, 2021 export default function RootWithNavigationState() { const showBottomTabBar = useSelector(state => state.user.showBottomTabBar); const [ display, setDisplay ] = useState('flex'); useEffect(() => ...
This is a nice way to remove the use of magic values within a codebase, since we have type-safe representation options that are all related to each other. But things may not always be as they seem. What do you think you get if you pass this through the TypeScript compiler? console....
Learn how LogRocket's Galileo cuts through the noise to proactively resolve issues in your app Use React's useEffect to optimize your application's performance Switch between multiple versions of Node Discover how to use the React children prop with TypeScript Explore creating a custom mouse curso...
Most of the confusion over "Context vs Redux" stems from a lack of understanding about what these tools actuallydo, and what problems they solve. So, in order to actually know when to use them, we need to first clearly define what they do and what problems they solve. ...
To do that, change the env property down from es2020. To check browser API compatibility, use eslint-plugin-compat. It uses the same Browserlist config used by Babel and other tools. Full instruction can be found in the eslint-plugin-compat repo. We’ll use the browserlist defaults ...