Shopify Engineering·4yMastering React’s Stable Values
UseState and useReducer return a state update function that is constant – the hook will always return the same function. UseFocusEffect has to assume that this new function’s behavior is different and what it does (on every render) is call the cleanup function unsubscribe. The pitfall is in how we tell React to render the JSX.
LogRocket·4y12 essential ESLint rules for React
ESLint has a comprehensive set of rules for JavaScript code that cover stylistic choices and prevent common bugs. The rules are discussed in detail in the React documentation, but there are two rules that must be followed when using Hooks. Action buttons that are not intended to submit a form should have a type attribute. When no type is specified, a button defaults to a type of submit. If an optional prop is not passed to a component, it will be undefined.