Async Defer During web development need to care that the feature should run with no or minimum impact on site performance. JS bundle load and its execution play a significant role in site performance. <script> Let’s start by defining what <script> without any attributes does. The HTML file will be parsed until the…

React 17 was released on 20th October, 2020. It doesn’t contain any developer facing new features. But there are lots of internal things that have changed in React. Below are the highlight of the main changes: Gradually Upgrade. Changes to Event Delegation New JSX Other Changes Gradually Upgrade React 17 allows embedding…

If you landed here then you have an idea that React uses Virtual DOM for better performance and want to have better understanding of it. …

It’s good to have basic knowledge of Event Loop, Component lifecycle methods and Virtual DOM for better understanding of this article. For an end user the expected behavior is the site load with proper data in first go. But in case of API call it takes some time to fetch…