Both options are fully self-contained — no server required for the participant-facing app.
Two-file export Recommended
Downloads index.html + config.json as a zip. The HTML loads config at runtime — updating study parameters means replacing only config.json without re-exporting the HTML.
Single-file export
Config baked inline as a <script> block. One file to deploy or share directly. Use when distribution simplicity outweighs updateability.