Building a Single-File Offline Prompt Tool With Vanilla JS

Short summary

A walkthrough of building a 3,000-entry prompt tool as a single offline HTML file using vanilla JS — no build step, no backend, no dependencies. Data ships as a JSON literal, filtering uses simple Array.filter, and pagination keeps rendering fast. The author pitches a free demo at the end, which slightly dilutes the technical content.

• •Single-file HTML tools eliminate build steps, backends, and hosting costs
• •3,000 entries ship as a JSON literal parsed on load — no fetch or CDN needed
• •Simple Array.filter with pagination handles search without a state library

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