Developer builds interactive architecture diagrams as single-file HTML to replace static images

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A developer has shared a technique for creating interactive architecture diagrams as self-contained HTML files, replacing static screenshots that quickly become outdated. The approach stores all diagram content in plain JavaScript arrays, uses CSS Grid for layout, and draws connectors via an SVG overlay measured at runtime. Unlike PNG exports or Mermaid-in-docs solutions, the resulting file is fully editable, interactive, and opens offline without any build tools or renderer. An animated token visually traces a request's path through the architecture, helping audiences follow system flows during presentations. The developer recommends this method specifically for diagrams that will be taught from repeatedly and need to evolve alongside the system they represent.

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