Dev.to
6/23/2026

Day 71 of Learning MERN Stack
Short summary
Developer shares day 71 of a 100-day MERN learning challenge, building a checkout payment flow with dynamic pricing. Demonstrates MongoDB array operations to store bookings via Mongoose $push, with UI logic for base compute, service fees, and tax calculations.
- •Building payment checkout UI with trip details, guest caps, and card input fields
- •Wired MongoDB booking array modifications using Mongoose operators to store transaction data
- •Implemented pricing breakdown logic: base cost × nights + service fees + taxes
Generated with AI, which can make mistakes.
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