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Build a Calendar / Date Picker

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01

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Build a month-view calendar with date selection and navigation.

ReactDatesUI
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Building a Calendar / Date Picker in React

Mental model: A month view is a grid: leading blanks for the days before the 1st, then the day numbers. Track the viewed month and the selected date separately. The only date math is "first weekday of the month" and "days in month" — both one-liners with the Date

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04

React solution

Complete solutionRun Playground
import React from 'react';
import DatePicker from './src/DatePicker';

export default function App() {
  return (
    <div style={{ fontFamily: 'sans-serif', padding: 20 }}>
      <h1>Date Picker Demo</h1>
      <DatePicker />
    </div>
  );
}
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Transmission complete // awaiting log

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Dossier 69 of 87 decoded in the Frontend Machine Coding track. One more won't hurt.

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