Multi-Currency Exchange Rate Converter
Build a comprehensive currency converter using HTML5, CSS3, and JavaScript with support for 170+ currencies including crypto.
Prompt Content
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Develop a comprehensive currency converter using HTML5, CSS3, JavaScript and a reliable Exchange Rate API. Create a clean, intuitive interface with prominent input fields and currency selectors. Implement real-time exchange rates with timestamp indicators showing data freshness. Support 170+ global currencies including crypto with appropriate symbols and formatting. Maintain a conversion history log with timestamps and rate information. Allow users to bookmark favorite currency pairs for quick access. Generate interactive historical rate charts with customizable date ranges. Implement offline functionality using cached exchange rates with clear staleness indicators. Add a built-in calculator for complex conversions and arithmetic operations. Create rate alerts for target exchange rates with optional notifications. Include side-by-side comparison of different provider rates when available. Support printing and exporting conversion results in multiple formats (PDF, CSV, JSON).
Use Cases
Reference Output
A fully functional web app with currency selectors, real-time rates, historical charts, favorites, offline cache, calculator, and rate alerts.
Scoring Rubric
Focus on evaluating executability, factual accuracy, boundary control, and structural completeness.
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