Promise The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value. A Promise is in one of these states: pending: initial state, neither fulfilled nor rejected. fulfilled: meaning that the...
The async and await keywords in JS that lets us make the functions asynchronous and enable asynchronous, promise-based behavior to be written in a cleaner style . what does the async keyword do: If we add Async keyword before any function then that...
In order to access and render the state properties, the React components need to connect to the Redux store. We can write React components as: Presentational components Container components Presentational Components: Presentational components ar...
Redux is an application data-flow architecture which is used for predicting state changes in JavaScript applications. Redux is not a framework. Redux can be used with any other View library but mostly used with React. Dan Abramov created Redux in 201...
Why Routing ? We have to navigate from one view to another without hitting server as in contrast to MultiPage web App where the page reloads every request to change the view . So here, we have to navigate from one view to another without hitting s...
1) useEffectHooks(,[]); In order to run some code after the component mounts or after the component updates, then we use componentDidMount and componentDidUpdate lifecycle methods in class based components respectively. As we cannot use these lifec...