Top SPFx Interview Questions with Answers
Author: Vishal Thakur
Published: August 2021
SPFx (SharePoint Framework) is a modern development model for building SharePoint solutions. Below are some of the most frequently asked SPFx interview questions with detailed answers to help you prepare for your next interview.
1. What is WebPack?
Answer: WebPack is a module bundling system built on top of Node.js. It handles the combination and minification of JavaScript and CSS files, as well as other assets like images using plugins. WebPack is the recommended way of bundling files in SPFx and React.js.
2. What is PowerShell?
Answer: PowerShell is a cross-platform task automation and configuration management framework developed by Microsoft. It consists of a command-line shell and a scripting language. It can run on Windows, Linux, and macOS.
3. What is Bundling and Minification?
Answer: Bundling and minification are processes used to compress code, improving load and request times. Bundling reduces the number of server requests by combining multiple files into one, while minification reduces file size by removing unnecessary characters like spaces and comments.
4. How to Optimize the SPFx WebPart?
Answer: SPFx WebParts can be optimized using the following methods:
- Bundling: Combines all JavaScript files into a single file.
- Minification: Removes extra spaces and comments to reduce file size.
- Page Events: Use appropriate page events like
componentDidMount()to load necessary functions. - REST API Calls: Minimize REST API calls by using collections for CRUD operations.
- Pagination: Load only the required data instead of the entire dataset.
5. What is the Difference Between Local Workbench and Live Workbench?
Answer:
- Local Workbench: Runs on
https://localhost:5432/workbench. It provides a static environment for testing UI components. - Live Workbench: Runs on a live SharePoint site (e.g.,
https://mysite.sharepoint.com/sites/mysite/_layouts/15/workbench.aspx). It allows access to SharePoint resources like lists and libraries.
6. What is the Default Port Number Used by the Local Workbench in SPFx?
Answer: The default port number for the local workbench is 5432. This port is reserved for Adaptive Authentication (TCP) in PostgreSQL databases. It can be changed in the server.json file.
7. What is Yeoman (Yo) Generator?
Answer: Yeoman is an open-source scaffolding tool used in modern web applications. It simplifies development by generating templates and boilerplate code using the yo command.
8. What is Gulp-CLI and Gulp Local?
Answer:
- Gulp-CLI: The global version of Gulp that runs outside the Node.js environment.
- Gulp Local: The local version of Gulp that works within the Node.js environment.
9. What is a Transpiler in SPFx and React.js?
Answer: A transpiler, like Babel, converts modern JavaScript (ES6+) into backward-compatible code that can run on older JavaScript engines. Babel is used in SPFx to transpile React.js code.
10. What Happens When the gulp serve Command is Run?
Answer: The gulp serve command starts a local development server, enabling live testing of SPFx components. It uses Gulp, Node.js, and other plugins to provide a development environment.
11. How Does Node.js Manage the SPFx Environment?
Answer: Node.js provides a runtime environment for SPFx development. It allows developers to run JavaScript outside the browser and manage dependencies using npm (Node Package Manager).
12. What is Chokidar.js?
Answer: Chokidar.js is a fast and efficient file-watching library for Node.js. It monitors file changes and notifies developers when files are added, modified, or deleted.
13. What is Chalk.js?
Answer: Chalk.js is a Node.js module used to style and format command-line output. It allows developers to customize text colors and themes in the terminal.
14. Why Do We Run npm install to Resolve Dependencies?
Answer: The npm install command downloads and installs all dependencies listed in the package.json file. It creates a node_modules folder containing the installed packages.
15. What is package.json?
Answer: The package.json file is a configuration file in the root directory of an SPFx solution. It lists all dependencies and their versions, enabling Node.js to install the required packages.
16. How to Check the Version of Node.js and Dependencies?
Answer: Use the following commands:
node -v: Check Node.js version.npm -v: Check npm version.gulp -v: Check Gulp version.npm list -g --depth=0: List all globally installed dependencies.npm cache clean --force: Clear npm cache.npm install npm@latest -g: Update npm to the latest version.
17. What is Polyfill.js?
Answer: Polyfill.js is a JavaScript file or plugin used to provide modern functionality to older browsers that do not natively support it. It is commonly used for compatibility with Internet Explorer and older versions of Edge.
18. What is the Visual Studio Code Terminal?
Answer: The Visual Studio Code terminal provides a command-line interface for developers to run commands and scripts. It supports multiple shells, including PowerShell.
19. What is the Development and Deployment Process of SPFx?
20. What is the Meaning of .SPPKG Package?
Answer: The .SPPKG file is a SharePoint solution package used to deploy SPFx components to SharePoint. It is similar to SharePoint add-in packages.
Hope this will help! Kindly share your feedback so that I can improve my blogs.
Comments
Post a Comment