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Conditionally set the CSS `display` property to none in React: Store a boolean value in the state indicating whether the element should be displayed. Conditionally set the display property in the element's `style` attribute. For example, style={{displ...

To resolve "Uncaught ReferenceError: process is not defined" in React, you need to 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 reinstall depe...

To update an array of object state in React: Use the map() method to iterate over the array. In each iteration, check if a condition is met. Update the properties of the objects that meet the condition....

To update state when props change in React: pass props as dependencies to the useEffect hook. Every time props change, the logic in useEffect will re-run....

Setting the CSS visibility property to hidden in React: Store a boolean value in the state indicating whether the element should be visible. Conditionally set the visibility property in the element's style attribute. For example, style={{visibility: i...

To create a sleep function in React: Define a function that takes a number of milliseconds as a parameter. The function should return a Promise that is resolved after the provided number of milliseconds....

To remove an object from the state array in React: Use the filter() method to iterate over the array. In each iteration, check if the condition is met. Set the state to the new array returned by the filter method....

To set an onClick listener on a link in React: Set the onClick property on the link. Every time the link is clicked, the function we passed to the props will be called....

Using map() method with index in React: Call map() method on array. The function passed to map() method will be called with element and index....

Use the useEffect hook to run react hooks when the component is unmounted. The function we return from the useEffect hook is called when the component is unmounted and can be used for cleanup purposes....

Use the useEffect hook to call a function only once in React. When the useEffect hook is passed an empty dependencies array, it runs only when the component mounts. This is the preferred approach when we have to fetch data when the component mounts....

To replace an object in an array in React state: Use the map() method to iterate over the array. In each iteration, check if a certain condition is met. Replace the objects that meet the condition and return all other objects as is....

Adding types to the useRef hook might be a little confusing at first, let’s look at why that is: import {useEffect, useRef} from react ; export function RefDemo () { const inputRef = useRef (); useEffect ( () = { inputRef. current . fo...

To qualify the useState hook object in React, use the hook's generic type, for example, const [employee, setEmployee] = useState{name: string; salary: number}({name: ,salary: 0}) . The state variable will only accept key-value pairs of the specified t...

Use the textDecoration property to add a strikethrough to text in React, for example, span style={{textDecoration: line-through}} . The text-decoration CSS property sets the appearance of text decoration lines. const App = () = { return ( div h2 span ...