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Allergy Check

Configurable ingredient-risk detection for online shopping

My role
Creator
  • Chrome extension
  • JavaScript
  • DOM integration
  • Rule engine
PROLOGUE

A browser extension built for a direct, medically relevant shopping problem.

This started with an ordinary shopping trip and a non-ordinary allergy. Palm oil sits outside familiar packaging warnings, so every product meant reading the full ingredient list and wondering whether an alias had been missed.

I

What I walked intoThe setup

Standard allergen labels do not cover every ingredient risk, so full lists had to be checked repeatedly.

II

How I untangled itThe turning point

The extension checks configurable terms and aliases, then shows SAFE or AVOID with the exact match and inspected source text.

III

What changedWhere it landed

A transparent rule engine that explains what it found instead of returning an unexplained warning.

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