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I have a react functional component and declares my state as:
const [myState, setMyState] = useState<boolean>(true);
When this function re-renders when one of my props changes, does myState get reset to true ?
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A second or subsequent render to update the state is called as re-rendering. React components automatically re-render whenever there is a change in their state or props. A simple update of the state, from anywhere in the code, causes all the User Interface (UI) elements to be re-rendered automatically.
If the value doesn't change, React will not trigger a re-render. This hook internally runs an interval every 500 milliseconds which is absolutely scary because inside we are always calling setDay . In these cases, React doesn't trigger a re-render because the state did not change.
To update our state, we use this. setState() and pass in an object. This object will get merged with the current state. When the state has been updated, our component re-renders automatically.
To maintain state after a page refresh in React, we can save the state in session storage. const Comp = () => { const [count, setCount] = useState(1); useEffect(() => { setCount(JSON. parse(window. sessionStorage.
Value of state will not get altered automatically after a re-render.
In react, it is always one-way transition:
Change of state will trigger the render() method.
Render method will not trigger state change.
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