Javascript
shape
POST, PUT, etc.) and the environment (browser, Node.js, etc.). Below are the most common ways to send JSON data in an HTTP request, particularly using JavaScript. useEffect hook is one of the most important hooks in React. It allows you to perform side effects in functional components, such as fetching data, updating the DOM, subscribing to events, or cleaning up resources like timers and subscriptions. It is React's answer to lifecycle methods (componentDidMount, componentDidUpdate, and componentWillUnmount) in class components. async/await in Node.js is syntactic sugar built on top of Promises that allows you to write asynchronous code in a more readable, synchronous-like manner. It simplifies the process of working with Promises and makes asynchronous code easier to manage and understand. this keyword in JavaScript refers to the context in which a function is called. Its value depends on how a function is invoked and can change dynamically. It is commonly used to access the properties and methods of the current object, but its behavior varies across different execution contexts.Here’s a breakdown of how this works in different situations: