Mastering the Node.js Interview: Essential Questions and Answers

Node.js is a popular, open-source runtime environment for building server-side applications. It is built on Chrome’s V8 JavaScript engine and uses an event-driven, non-blocking I/O model. During a Node.js interview, you may be asked about your experience with asynchronous programming, the event loop, and the use of modules. You may also be asked about popular […]

React: If Else conditions in JSX

In this article, we will see how to add If and If/Else conditions in JSX in React. JSX If condition using && operator If we are just planning to display something conditionally we can use a if condition in JSX. In Javascript, true && expression will evaluate to expression and false && expression evaluates to […]

React: Passing State from Parent to Child Component

In this article, we will see how State can be passed from Parent component to Child Component as props. In the below example, App is a stateful component that has property name initialized in the constructor. It calls Child Component “Hello” and passes the state variable “name” as props.   Parent Component class App extends […]

React : Updating Component State using setState

In this article, we will see how to update Component State in React. Updating Component State in React In React, we can initialize state of a Component in the constructor using this.state. If we need to change the component’s state, we can do the same using setState() method. It takes key-value pairs as arguments, where […]

Create and Render State in React Component

In this article, we will see how to create and access/render state in a React Component. Creating State in React Component We can create state in a React component by using the state property in the Component’s constructor. Syntax for adding state this.state = { // add the state variables } For example, we can […]