README

dayzed

Primitives to build simple, flexible, WAI-ARIA compliant React date-picker components.

The problem

You need a date-picker in your application that is accessible, can fit a number of use cases (single date, multi date, range), and has styling and layout that can be easily extended.

This solution

This is a component that focuses on controlling user interactions so you can focus on creating beautiful, accessible, and useful date-pickers. It uses a render function as children. This means you are responsible for rendering everything, but props are provided by the render function, through a pattern called prop getters, which can be used to help enhance what you are rendering.

This differs from other solutions which render things for their use case and then expose many options to allow for extensibility resulting in a bigger API that is less flexible as well as making the implementation more complicated and harder to contribute to.

Installation
Usage
Props
Control Props
Render Prop Function
- prop getters
- state
Inspiration and Thanks!
Other Solutions
Contributors
LICENSE

Installation

This module is distributed via npm which is bundled with node and should be installed as one of your project's dependencies:

npm install --save dayzed

Or, you can install this module through the yarn package manager.

yarn add dayzed

This package also depends on react, prop-types, and date-fns. Please make sure you have those installed as well.

Note also this library supports preact out of the box. If you are using preact then use the corresponding module in the preact/dist folder. You can even import Dayzed from 'dayzed/preact'

Usage

import React from 'react';
import Dayzed from 'dayzed';

const monthNamesShort = [
  'Jan',
  'Feb',
  'Mar',
  'Apr',
  'May',
  'Jun',
  'Jul',
  'Aug',
  'Sep',
  'Oct',
  'Nov',
  'Dec'
];
const weekdayNamesShort = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];

class Datepicker extends React.Component {
  render() {
    return (
      <Dayzed
        onDateSelected={this.props.onDateSelected}
        selected={this.props.selected}
        render={({
          calendars,
          getBackProps,
          getForwardProps,
          getDateProps
        }) => {
          if (calendars.length) {
            return (
              <div
                style={{ maxWidth: 800, margin: '0 auto', textAlign: 'center' }}
              >
                <div>
                  <button {...getBackProps({ calendars })}>Back</button>
                  <button {...getForwardProps({ calendars })}>Next</button>
                </div>
                {calendars.map(calendar => (
                  <div
                    key={`${calendar.month}${calendar.year}`}
                    style={{
                      display: 'inline-block',
                      width: '50%',
                      padding: '0 10px 30px',
                      boxSizing: 'border-box'
                    }}
                  >
                    <div>
                      {monthNamesShort[calendar.month]} {calendar.year}
                    </div>
                    {weekdayNamesShort.map(weekday => (
                      <div
                        key={`${calendar.month}${calendar.year}${weekday}`}
                        style={{
                          display: 'inline-block',
                          width: 'calc(100% / 7)',
                          border: 'none',
                          background: 'transparent'
                        }}
                      >
                        {weekday}
                      </div>
                    ))}
                    {calendar.weeks.map((week, weekIndex) =>
                      week.map((dateObj, index) => {
                        let key = `${calendar.month}${
                          calendar.year
                        }${weekIndex}${index}`;
                        if (!dateObj) {
                          return (
                            <div
                              key={key}
                              style={{
                                display: 'inline-block',
                                width: 'calc(100% / 7)',
                                border: 'none',
                                background: 'transparent'
                              }}
                            />
                          );
                        }
                        let { date, selected, selectable, today } = dateObj;
                        let background = today ? 'cornflowerblue' : '';
                        background = selected ? 'purple' : background;
                        background = !selectable ? 'teal' : background;
                        return (
                          <button
                            style={{
                              display: 'inline-block',
                              width: 'calc(100% / 7)',
                              border: 'none',
                              background
                            }}
                            key={key}
                            {...getDateProps({ dateObj })}
                          >
                            {selectable ? date.getDate() : 'X'}
                          </button>
                        );
                      })
                    )}
                  </div>
                ))}
              </div>
            );
          }
          return null;
        }}
      />
    );
  }
}

class Single extends React.Component {
  state = { selectedDate: null };

  _handleOnDateSelected = ({ selected, selectable, date }) => {
    this.setState(state => ({ selectedDate: date }));
  };

  render() {
    let { selectedDate } = this.state;
    return (
      <div>
        <Datepicker
          selected={this.state.selectedDate}
          onDateSelected={this._handleOnDateSelected}
        />
        {this.state.selectedDate && (
          <div style={{ paddingTop: 20, textAlign: 'center' }}>
            <p>Selected:</p>
            <p>{`${selectedDate.toLocaleDateString()}`}</p>
          </div>
        )}
      </div>
    );
  }
}

export default Single;

Props

date

date | defaults to new Date()

Used to calculate what month to display on initial render.

maxDate

date | optional

Used to calculate the maximum month to render.

minDate

date | optional

Used to calculate the minimum month to render.

monthsToDisplay

number | defaults to 1

Number of months returned, based off the date and offset props.

firstDayOfWeek

number | defaults to 0

First day of the week with possible values 0-6 (Sunday to Saturday). Defaults to Sunday.

showOutsideDays

boolean | defaults to false

Flag to fill front and back weeks with dates from adjacent months.

fillAdjacentMonths

boolean | defaults to false

(Deprecated) Use showOutsideDays instead.

selected

any | optional

An array of Dates or a single Date that has been selected.

onDateSelected

function(selectedDate: date) | required

Called when the user selects a date.

selectedDate: The date that was just selected.

render

function({}) | required

This is called with an object. Read more about the properties of this object in the section "Render Prop Function".

offset

number | control prop (read more about this in the "Control Props" section below) - defaults to 0 if not controlled.

Number off months to offset from the date prop.

onOffsetChanged

function(offset: number) | control prop (read more about this in the "Control Props" section below)

Called when the user selects to go forward or back. This function is required if offset is being provided as a prop.

offset: The number of months offset.

Control Props

dayzed manages its own offset state internally and calls your onOffsetChanged handler when the offset changes. Your render prop function (read more below) can be used to manipulate this state from within the render function and can likely support many of your use cases.

However, if more control is needed, you can pass offset as a prop (as indicated above) and that state becomes controlled. As soon as this.props.offset !== undefined, internally, dayzed will determine its state based on your prop's value rather than its own internal state. You will be required to keep the state up to date (this is where the onOffsetChanged handler comes in really handy), but you can also control the state from anywhere, be that state from other components, redux, react-router, or anywhere else.

Note: This is very similar to how normal controlled components work elsewhere in react (like <input />). If you want to learn more about this concept, you can learn about that from this the "Controlled Components" lecture

Render Prop Function

This is where you render whatever you want to based on the state of dayzed. It's a regular prop called render: <Dayzed render={/* right here*/} />.

You can also pass it as the children prop if you prefer to do things that way <Dayzed>{/* right here*/}</Dayzed>

The properties of this object can be split into two categories as indicated below:

prop getters

See the blog post about prop getters

These functions are used to apply props to the elements that you render. This gives you maximum flexibility to render what, when, and wherever you like. You call these on the element in question (for example: <button {...getDateProps()})). It's advisable to pass all your props to that function rather than applying them on the element yourself to avoid your props being overridden (or overriding the props returned). For example: getDateProps({onClick(event) {console.log(event)}}).

property	type	description
`getDateProps`	`function({})`	Returns the props you should apply to the date button elements you render.
`getBackProps`	`function({})`	Returns the props you should apply to any `back` button element you render.
`getForwardProps`	`function({})`	Returns the props you should apply to any `forward` button element you render.

state

These are values that represent the current state of the dayzed component.

property	type	description
`calendars`	`any`	An array containing objects of each month's data.
`calendars[{}].month`	`number`	Zero-based number of the month. (0 - 11)
`calendars[{}].year`	`number`	The year of the month.
`calendars[{}].firstDayOfMonth`	`date`	First day of the month.
`calendars[{}].lastDayOfMonth`	`date`	Last day of the month.
`calendars[{}].weeks`	`any`	An array containing an array of date objects for each week of the month. Starting from Sunday to Saturday. `[ ["", "", "", "", dateObj, dateObj, dateObj] ]`
`calendars[{}].weeks[[{}]].date`	`date`	A `Date` object for that day of the week.
`calendars[{}].weeks[[{}]].selected`	`boolean`	Whether the `Date` was given as part of the provided `selected` prop.
`calendars[{}].weeks[[{}]].selectable`	`boolean`	Whether the `Date` is selectable given the provided `maxDate` and `minDate` props.
`calendars[{}].weeks[[{}]].today`	`boolean`	Whether the `Date` is today's date.
`calendars[{}].weeks[[{}]].prevMonth`	`boolean`	Whether the `Date` is in the previous month. Useful when the `showOutsideDays` flag is used.
`calendars[{}].weeks[[{}]].nextMonth`	`boolean`	Whether the `Date` is in the next month. Useful when the `showOutsideDays` flag is used.

Inspiration and Thanks!

Jen Luker
- For help with naming and reviewing this library.
Kent C. Dodds
- This library borrows heavily from his awesome downshift library!
Michael Jackson & Ryan Florence
- For teaching the use of the render prop pattern.

Contributors

Thanks goes to these people (emoji key):

_{Morgan Kartchner} 💻 📖 💡 🤔 👀 ⚠️	_{Jen Luker} 💻 💡 🤔	_{Sam Gale} 💻 🤔	_{Arthur Denner} 💻 🤔	_{Dony Sukardi} 💻 💡 ⚠️	_{Amit Solanki} 📖

This project follows the all-contributors specification. Contributions of any kind welcome!

LICENSE

MIT

@chrisdhanaraj/dayzed

Usage no npm install needed!