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When we try to return an array of elements from a function component, a React.js error “Type '() => JSX.Element[]' is not assignable to type FunctionComponent” occurs. To fix the error, you need to wrap the array of elements in a React fragment....

When we try to export an anonymous function using default export, it results in the warning “Unexpected default export of anonymous function.” To fix this error, you need to give the function a name before exporting it....

The React.js error “Property does not exist on type 'Readonly'” occurs when we try to access the props or state of an untyped class component. To fix the error, you need to use generics on the React.Component class to type the props or state of th...

When we use a string as a reference in a function component, we get the error "Function components cannot have string refs". To fix this error, we need to use the useRef() hook to get a mutable ref object that we can use as a component....

To resolve the “Uncaught ReferenceError: process is not defined” error in React, open a terminal in the root directory of your project and update the version of the `react-scripts` package by running `npm install react-scripts@latest` and reinstal...

When we use the useState hook in our code but forget to import it, it generates the error Uncaught ReferenceError: useState is not defined. To fix this error, you need to import the hook before using it import {useState} from react . // ?️...

Type onKeyUp events in React using React.KeyboardEvent type. KeyboardEvent interface is used for onKeyUp events. We can access the value of the key pressed by the user through `event.key`....

In React, when we initialize a ref with a null value and do not include null in its type, an error "Cannot assign to 'current' because it is a read-only property" will occur. To fix the error, include null in the type of ref, such as `...

The 'react-hooks/exhaustive-deps' rule warns us when we are missing dependencies in effect hooks. To get rid of the warning, move the function or variable declaration inside the `useEffect` hook, remember arrays and objects that change on every render...

Set the pointer-events CSS property to none to disable links in React, for example. When a link's pointer-events property is set to none, the link is disabled....

When developing web applications, sometimes we have to prompt the user with a confirmation dialog before performing an action (such as deleting a user). Creating multiple dialogs is inefficient and it is difficult to maintain a bunch of duplicate logi...

Set the text color of an element in React.js using inline styles, such as colorful . The text color will be applied only to the element to which it is added and its children....

To pass an onChange event handler to a child component in React: Define the event handler function in the parent component. Set it as the **onChange** property on the child input field....

To get an element by ID in React: Set the ref attribute on the element. Use the current property to access the element in the useEffect hook....

To add a hover class in React, you need to follow these steps: Set the **onMouseOver** and **onMouseOut** properties on the element. Track whether the user is hovering over the element in a state variable. Conditionally add the class based on the stat...