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Dev.to
6/23/2026
Day 71 of Learning MERN Stack

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

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