syncfusion-react-datepicker（syncfusion React datepicker 开发）

Implementing DatePicker

Component Overview

The DatePicker is a Syncfusion React component for date selection with powerful features:

• Calendar popup - Visual date selection with navigation
• Flexible formatting - Display and input formats with pattern support
• Masked input - enableMask for segment-by-segment date entry with maskPlaceholder
• Range validation - Min/max dates with strictMode automatic correction
• Multiple views - Month, year, and decade views via start and depth properties
• Day cell customization - Disable weekends, highlight special dates via renderDayCell event
• Full globalization - 150+ cultures, RTL (enableRtl), locale-specific formatting, firstDayOfWeek
• WCAG 2.2 compliant - Full accessibility with keyboard navigation and ARIA attributes
• Form ready - Controlled components, React hooks, form validation integration
• Programmatic control - show(), hide(), focusIn(), focusOut(), navigateTo(), currentView()

Complete API Summary

Key Properties

Methods

Events

Documentation & Navigation Guide

When the user needs help with DatePicker, guide them to the appropriate reference:

Getting Started

📄 Read: references/getting-started.md

• Installation via npm (@syncfusion/ej2-react-calendars)
• CSS theme imports (material3, bootstrap, fluent, tailwind)
• Component imports and setup
• Basic JSX implementation with DatePickerComponent
• Functional vs class component examples
• Running your first application

Date Formats & Input

📄 Read: references/date-formats-and-input.md

• Display format property and patterns (yyyy-MM-dd, dd/MM/yyyy, etc.)
• Custom format specifiers (# and 0 patterns)
• Input formats for flexible date entry (accepting multiple formats)
• Format examples with real-world scenarios
• Parsing and converting user input automatically
• Culture-based default formatting

Date Range & Validation

📄 Read: references/date-range-and-validation.md

• Min and max date properties for range restriction
• Range validation and error states
• strictMode for automatic out-of-range correction
• Out-of-range behavior and error handling
• Disabling dates outside valid range
• Edge cases and gotchas

Date Views & Navigation

📄 Read: references/date-views-and-navigation.md

• Start property (month, year, decade initial view)
• Depth property for restricting view levels
• Calendar navigation and user interactions
• Month and year selection shortcuts
• Navigating between different views
• Default behavior and best practices

Customization & Styling

📄 Read: references/customization-and-styling.md

• CSS classes for styling (e-datepicker, e-calendar, e-day, etc.)
• renderDayCell event for day customization
• Disabling specific dates and weekends
• Placeholder, disabled, and readonly states
• Custom CSS and theme customization
• Day cell appearance and behavior

Globalization & Localization

📄 Read: references/globalization-and-localization.md

• Culture and locale configuration (German, French, Arabic, etc.)
• Loading CLDR data for internationalization
• Date format by culture (different countries, different formats)
• Locale text customization (today button, placeholder)
• Right-to-Left (RTL) support for Arabic, Hebrew, Urdu
• Week start day by culture
• Number formatting and calendar adjustments

Accessibility & Keyboard Navigation

📄 Read: references/accessibility-and-keyboard.md

• WCAG 2.2 compliance and accessibility standards
• Keyboard navigation shortcuts (Alt+Down, arrow keys, Esc)
• ARIA attributes (aria-expanded, aria-disabled, aria-activedescendant)
• Screen reader support and announcements
• Focus management and visible focus indicators
• Color contrast and visual accessibility
• Mobile device support

Date Masking & Advanced Validation

📄 Read: references/date-masking-and-strict-mode.md

• enableMask property for structured segment-by-segment date input
• maskPlaceholder for custom segment placeholder text
• Date masking patterns for input guidance
• strictMode property behavior and enforcement
• Date parsing rules and validation logic
• Input validation and format enforcement
• Edge cases (leap years, month boundaries, etc.)
• Troubleshooting common validation issues
• Best practices for date input

Quick Start Example

Here's a minimal working example to get started:

import React, { useState } from 'react';
import { DatePickerComponent } from '@syncfusion/ej2-react-calendars';
import '@syncfusion/ej2-base/styles/material3.css';
import '@syncfusion/ej2-buttons/styles/material3.css';
import '@syncfusion/ej2-inputs/styles/material3.css';
import '@syncfusion/ej2-popups/styles/material3.css';
import '@syncfusion/ej2-react-calendars/styles/material3.css';

export default function App() {
  const [selectedDate, setSelectedDate] = useState(new Date());

  return (
    <div style={{ padding: '20px' }}>
      <h3>Select a Date</h3>
      <DatePickerComponent
        value={selectedDate}
        change={(e) => setSelectedDate(e.value)}
        placeholder="Enter date"
      />
      <p>Selected: {selectedDate?.toDateString()}</p>
    </div>
  );
}

Key points:

• Import DatePickerComponent from @syncfusion/ej2-react-calendars
• Import all required CSS themes (base, buttons, inputs, popups, calendars)
• Use value prop for the current date (can be null or Date object)
• Use change event (not onChange) to update React state — this is the Syncfusion event name
• DatePicker opens a calendar popup on click or Alt+Down arrow

Common Patterns

1. Date Range Picker (Min/Max Dates)

<DatePickerComponent
  value={new Date()}
  min={new Date(2026, 0, 1)}
  max={new Date(2026, 11, 31)}
  placeholder="Select a date in 2026"
/>

2. Custom Date Format

<DatePickerComponent
  value={new Date()}
  format="dd/MM/yyyy"
  placeholder="DD/MM/YYYY"
/>

3. Multiple Accepted Input Formats

<DatePickerComponent
  value={new Date()}
  format="yyyy-MM-dd"
  inputFormats={['dd/MM/yyyy', 'yyyy-MM-dd', 'yyyyMMdd']}
  placeholder="Enter date (dd/MM/yyyy or yyyy-MM-dd)"
/>

4. Year/Decade View for Birth Date Selection

<DatePickerComponent
  value={new Date()}
  start="Decade"
  depth="Year"
  placeholder="Select year"
/>

5. Disable Weekends

<DatePickerComponent
  value={new Date()}
  renderDayCell={(args) => {
    if ((args.date.getDay()) === 0 || (args.date.getDay()) === 6) {
      args.isDisabled = true;
    }
  }}
  placeholder="Weekdays only"
/>

6. Controlled Component in React Form

const [date, setDate] = useState(null);

<DatePickerComponent
  value={date}
  change={(e) => setDate(e.value)}
  format="yyyy-MM-dd"
  strictMode={true}
  placeholder="Enter date"
/>

7. German Culture with RTL Support

<DatePickerComponent
  locale="de"
  enableRtl={false}
  firstDayOfWeek={1}
  value={new Date()}
  placeholder="Datum eingeben"
/>

8. Masked Date Input

<DatePickerComponent
  enableMask={true}
  format="MM/dd/yyyy"
  maskPlaceholder={{ day: 'DD', month: 'MM', year: 'YYYY' }}
  placeholder="Select a date"
/>

9. Programmatic Control

import { useRef } from 'react';

const datePickerRef = useRef(null);

// Open calendar
datePickerRef.current.show();

// Close calendar
datePickerRef.current.hide();

// Focus
datePickerRef.current.focusIn();

// Get current view
const view = datePickerRef.current.currentView(); // "Month" | "Year" | "Decade"

// Navigate to specific view
datePickerRef.current.navigateTo('Year', new Date(2026, 0, 1));

<DatePickerComponent ref={datePickerRef} value={new Date()} />

10. Handle All Key Events

<DatePickerComponent
  value={new Date()}
  change={(e) => console.log('Changed:', e.value)}
  focus={(e) => console.log('Focused')}
  blur={(e) => console.log('Blurred')}
  open={(e) => console.log('Opened')}
  close={(e) => console.log('Closed')}
  cleared={(e) => console.log('Cleared')}
  navigated={(e) => console.log('Navigated to view:', e.view)}
  renderDayCell={(args) => {
    // Disable weekends
    if (args.date.getDay() === 0 || args.date.getDay() === 6) {
      args.isDisabled = true;
    }
  }}
/>