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React and SPFx Interview Questions with Scenarios and Code Examples

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Introduction React and SharePoint Framework (SPFx) are popular technologies used in modern web development, especially for building user interfaces and custom web parts in SharePoint. Preparing for interviews involving these technologies requires a solid understanding of core concepts, practical scenarios, and coding proficiency. In this blog, we’ll cover essential interview questions, different scenarios, and code examples to help you ace your React and SPFx interviews. Section 1: React Interview Questions 1. What is the Virtual DOM, and how does it improve performance in React? Scenario: Imagine you’re building a dashboard with multiple widgets that update frequently. How would React's Virtual DOM help optimize performance in this case? Explanation: React uses a Virtual DOM, an in-memory representation of the real DOM. When the state of an element changes, React updates the Virtual DOM first. It then calculates the difference (diffing) between the previous and current states of
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Microsoft Word add-in with header and footer using JavaScript

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  Microsoft Word is a powerful word-processing tool that is widely used by professionals and individuals alike. One of its most useful features is the ability to add headers and footers to documents, which can include page numbers, document titles, and other important information. In this blog post, we will walk through the process of creating a Microsoft Word add-in using JavaScript that allows users to easily add and customize headers and footers in their documents. Step 1: Set Up Your Environment To get started, you will need to set up your development environment. This will require you to have Microsoft Visual Studio installed on your computer, as well as the Microsoft Office Developer Tools for Visual Studio. Once you have these tools installed, create a new project and select the "Office/SharePoint" template. This will provide you with the necessary files and tools to create your Word add-in. Step 2: Create a New Command Next, you will need to create a new command tha
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