'Switch' is not exported from 'react-router-dom'
The React error 'Switch' is not exported from 'react-router-dom' occurs when we import 'Switch' from react-router-dom v6. In v6, ‘Switch’ was replaced by ‘Routes’
419 page expired error in Laravel
419 page expired error in Laravel occurs when the valid CSRF token is missing in the post request. Laravel checks the CSRF token in VerifyCsrfToken middleware.
Adjacent JSX elements must be wrapped in an enclosing tag
The "Adjacent JSX elements must be wrapped in an enclosing tag" error can be solved by wrapping the multiple elements in a parent div or in a react fragment
Block Scope and Shadowing in JavaScript
Learn what is a block, block scope, block-scoped variables, variable shadowing, and illegal shadowing in javascript with examples.
Call multiple functions onClick in React
To call multiple functions onClick in React, pass an event handler function into the onClick prop of the element that can call as many other functions as necessary.
Can't Perform a React State Update on an Unmounted Component
React Warning “Can't perform a react state update on an unmounted component” is caused when we try to update the state after the component was unmounted. Explains how to fix it.
Can't set headers after they are sent to the client
Error “Can't set headers after they are sent to the client” occurs when an express.js application tries to send multiple responses for a single request.
Cannot read property of undefined in JavaScript
The TypeError: Cannot read property of undefined occurs when we try to read a property on an undefined variable or when we try to access a property on a DOM element that doesn't exist.
To create a 404 page in React using React Router, Create a wildcard path with an asterisk(‘*’) and add it to the very last path of our routes.
Create a Back button with React Router
To create a back button with React Router use useNavigate() hook. Call navigate function eg. navigate(-1); inside the onClick function of the back button.
Delete an element from an array in PHP
To delete an element from an array in PHP, use built-in functions unset(), array_splice(), or array_diff(). Learn how to delete elements using these functions.
Each child in a list should have a unique key prop
Solve Warning: Each child in a list should have a unique ”key" prop in React by setting the id property as a unique key or by auto-assigning unique keys.