Grokking Node.js Design Patterns for Interviews/

...

/

Design a URL Builder with Conditional Parameters

Design a URL Builder with Conditional Parameters

Create a fluent URL builder that constructs a complete query string from optional parameters.

We'll cover the following...

Problem statement

You’re building an internal HTTP client wrapper that frequently needs to assemble URLs with optional query parameters—like sort, page, limit, and custom filters.

Currently, developers manually concatenate query parameters, which is error-prone and leads to invalid or inconsistent URLs. You’ve been asked to create a UrlBuilder that helps ...