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This concise article shows you how to upload multiple files in React with the help of Axios. It’s not a big job and can be done in a few simple steps (you’ll see the Javascript and TypeScript code snippets in step 3)....

To set an `onClick` listener on a div element in React: Set the `onClick` property on the div. Every time the div is clicked, the function we passed to the prop will be called. We can access the div via event.currentTarget....

To use a button as a link in React, wrap the button in a tag, or in a Link component if using react router. The button will be rendered instead of a link, and clicking it will cause the browser to navigate to the specified page....

In React, we use square brackets to get the first element of an array, for example, const first = arr[0]; . The array element with index 0 is the first element in the array. If the array is empty, undefined is returned. import {useState} from react ; ...

Template literals are used in React for string interpolation, for example div className={text-white ${myClass}} . Template literals are delimited by backticks and allow us to embed variables and expressions using the dollar sign and curly brace ${expr...

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....