I am analyzing the technical implementation of lightweight browser-based micro-apps and wanted to discuss two common architectural patterns for 2 sites:

State Persistence in Single-Page Apps: For simple tools like a digital counter or dhikr tracker, what is the best practice for storing state locally across browser sessions without triggering re-renders? Is relying purely on localStorage sufficient, or is IndexedDB preferred for lightweight tracking apps?

Client-Side vs. Server-Side Video Extraction: For web tools that parse HD media streams from video platforms (such as Kwai or Kuaishou), how do modern downloaders handle CORS and URL extraction efficiently? Is it better to handle stream parsing completely serverless via API endpoints, or process requests through a reverse proxy?

Would love to hear how other developers structure these types of minimal web utilities to keep performance optimal and server overhead low.

A free, browser-based digital tasbih that lets you track your daily dhikr with custom target limits and auto-saving progress without downloading an app

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