Prep 10: Location interface, URL API, and the File API's Blobs

Browser Location API URLSearchParams
Writing and Reading Blobs
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  1. Browser Location API
  2. URLSearchParams interface, e.g. as obtained from the window.location search property
  3. Creating a blob 🤢
  4. Extracting data from a blob 🤮
Last modified November 20, 2025: Simplify E3 Q2-3 solution (c3e4183)