Vite Advanced Interview Questions Quiz Quiz

Challenge your understanding of advanced Vite concepts, including module resolution, server configuration, plugin mechanics, and performance optimization. This quiz is designed for developers seeking to assess and refine their Vite expertise with realistic scenarios and key terminology.

1. Vite's Module Resolution Mechanism

   Which feature allows Vite to optimize dependency resolution by pre-bundling third-party modules during the development server start?

   1. Asset Inlining
   2. Code Splitting
   3. Dependency Pre-Bundling
   4. Tree Shaking

   Explanation: Dependency pre-bundling works by processing and bundling third-party modules upfront to ensure faster module resolution and improved server start time. Asset inlining refers to embedding assets in the output directly, which is unrelated to dependency management. Tree shaking removes unused code at build time, not during initial module resolution. Code splitting divides code into chunks for lazy loading, which also doesn’t optimize how dependencies are resolved during server startup.

2. Vite Server Configuration

   When configuring Vite to use a custom port and enable HTTPS for the development server, which configuration property should be amended?

   1. server
   2. build
   3. resolve
   4. optimizeDeps

   Explanation: The 'server' property in the configuration controls settings such as port number and HTTPS activation for the development server. The 'build' property relates to output preferences for production builds. 'optimizeDeps' focuses on dependency optimization, not directly on the server’s runtime behavior. 'resolve' is used for customizing module resolution strategies and does not modify the server setup.

3. Vite Plugin Hook Lifecycle

   During which plugin hook phase can you manipulate the final HTML output before it is sent to the browser?

   1. transformIndexHtml
   2. load
   3. resolveId
   4. buildStart

   Explanation: The 'transformIndexHtml' hook allows plugins to modify the final HTML output, enabling script injection or tag manipulation before serving it to the browser. The 'load' hook is used for custom handling of module loading. 'resolveId' assists in determining how module ids are resolved. 'buildStart' executes before the build process kicks off, unrelated to HTML finalization.

4. Hot Module Replacement (HMR) Handling

   If a developer makes style changes to a component's CSS file, how does Vite's hot module replacement system typically respond?

   1. The entire page is reloaded automatically
   2. All files in the project are reloaded every time
   3. The JavaScript logic is recompiled but styles are ignored
   4. Only the affected styles are updated without a full page reload

   Explanation: Vite’s HMR is designed to update only the changed modules, including CSS, enabling instant style updates without a full reload. Full page reloads generally occur only for configuration changes or major errors. JavaScript logic is not recompiled if only CSS files are modified. Reloading all files on every change would be inefficient and is not how HMR operates.

5. Optimizing Large Monorepo Projects

   For a large monorepo with many shared packages, which Vite configuration adjustment best improves dependency optimization and developer experience?

   1. Specifying entries in optimizeDeps.include
   2. Adjusting assetsDir path
   3. Changing cacheDir location
   4. Enabling sourcemap in build options

   Explanation: Manually listing frequently used packages in 'optimizeDeps.include' helps Vite pre-bundle these dependencies, speeding up module resolution in complex monorepo setups. 'assetsDir' only affects where static assets are output in the build. Changing the location of 'cacheDir' affects only where cache files are written, not optimization. The 'sourcemap' option assists in debugging but doesn't speed up dependency processing.