Cloning children with new props You can use React.Children to iterate over the children, and then clone each element with new props (shallow merged) using React.cloneElement. For example: const Child = ({ doSomething, value }) => ( <button onClick={() => doSomething(value)}>Click Me</button> ); function Parent({ children }) { function doSomething(value) { console.log(“doSomething called by child … Read more
That’s property spread notation. It was added in ES2018 (spread for arrays/iterables was earlier, ES2015), but it’s been supported in React projects for a long time via transpilation (as “JSX spread attributes” even though you could do it elsewhere, too, not just attributes). {…this.props} spreads out the “own” enumerable properties in props as discrete properties … Read more
Think of it like you’re just calling JavaScript functions. You can’t use a for loop where the arguments to a function call would go: return tbody( for (let i = 0; i < numrows; i++) { ObjectRow() } ) See how the function tbody is being passed a for loop as an argument – leading … Read more
React Router v5.1.0 with hooks There is a new useHistory hook in React Router >5.1.0 if you are using React >16.8.0 and functional components. import { useHistory } from “react-router-dom”; function HomeButton() { const history = useHistory(); function handleClick() { history.push(“/home”); } return ( <button type=”button” onClick={handleClick}> Go home </button> ); } React Router v4 … Read more