react-state - w3toppers.com

Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of Transition which is inside StrictMode

In index.js change <React.StrictMode><App /><React.StrictMode> to <App /> and you will not see this warning. Please note that strict mode helps you with Identifying components with unsafe lifecycles Warning about legacy string ref API usage Warning about deprecated findDOMNode usage Detecting unexpected side effects Detecting legacy context API Please refer to https://reactjs.org/docs/strict-mode.html before removing it.

What is useState() in React?

React hooks are a new way (still being developed) to access the core features of react such as state without having to use classes, in your example if you want to increment a counter directly in the handler function without specifying it directly in the onClick prop, you could do something like: … const [count, … Read more

React – changing an uncontrolled input

I believe my input is controlled since it has a value. For an input to be controlled, its value must correspond to that of a state variable. That condition is not initially met in your example because this.state.name is not initially set. Therefore, the input is initially uncontrolled. Once the onChange handler is triggered for … Read more