accessible-event-calendar

About

This project was built to deliver a simple, light weight and low tech event calendar for use within the nyc.gov web site. Among the requirements were ease of updating events by non programmers, as well as accessible screen reader performance and keyboard navigation. The event data is created as simple CSV in a spreadsheet or text editor. Screen reader performance and keyboard navigation were acheived through a series of agile accessible design working sessions with visually impaired screen reader users.

Now with OSM event location maps!

Data © OpenStreetMap contributors, ODbL 1.0.
https://osm.org/copyright
https://www.openstreetmap.org/
https://nominatim.org/

Build

Build the deployable javascript and example implementation

Clone git clone https://github.com/timkeane/accessible-event-calendar
Run npm install
Run npm run build
Deployable files will be located in the dist folder

Usage

Generate the calendar data

Example CSV

date	name	start	end
2023-01-01	New Year's Day Brunch	11am	3:30PM
2023-01-16	MLK Day Event	1200	1700
2023-03-17	St. Patrick's Day Parade	9a	5p

Know the time zone for the data

Run Intl.supportedValuesOf('timeZone') in the browser console to get a list of all time zones
Run Intl.DateTimeFormat().resolvedOptions().timeZone in the browser console to get the system time zone

Basic javascript usage

Build or download the latest release

Example page

<!DOCTYPE html>
<html>
  <head>
    <title>calendar-demo</title>
    <!-- 
      Include javascript dependencies
    -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.2/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/PapaParse/5.3.2/papaparse.min.js"></script>
    <!-- 
      Include the accessible-event-calendar javascript and css
    -->
    <script src="./calendar.min.js"></script>
    <link href="./calendar.min.css" rel="stylesheet">
  </head>
  <body>
    <!-- 
      Create a target DIV on the page 
      into which the calendar will be rendered
    -->
    <div id="calendar-demo"></div>
    <script>
      /* Instantiate the calendar */
      var calendar = new CsvEventCalendar({
        target: '#calendar-demo',
        url: './calendar.csv',
        timeZone: 'America/New_York'
      });
    </script>
  </body>
</html>

Node.js

package.json

{
  ...
    "dependencies": {
      "accessible-event-calendar": "latest",
      "jquery": "^3.6.2",
      "papaparse": "^5.3.2",
      ...
    }
  ...
}

index.js

import CsvEventCalendar from 'accessible-event-calendar/CsvEventCalendar';

const calendar = new CsvEventCalendar({
  target: '#calendar-demo',
  url: './calendar.csv',
  timeZone: 'America/New_York'
});

Change the time zone and the country for geocoding

import CsvEventCalendar from 'accessible-event-calendar/CsvEventCalendar';
import OsmGeocoder from 'nyc-lib/nyc/OsmGeocoder';

const calendar = new CsvEventCalendar({
  target: '#calendar-demo',
  url: './calendar.csv',
  timeZone: 'Europe/London',
  geocoder: new OsmGeocoder({countryCodes: ['gb']})
});

CSV Format Requirements

File must include a header row with column names for the following event properties:

Event date
- Recommended column name date
- Required format: yyyy-mm-dd
Event name
- Recommended column name name
Event start time
- Recommended column name start
- 12 hr or 24 hr format
Event end time
- Recommended column name end
- 12 hr or 24 hr format

Example CSV

date	name	start	end
2023-01-01	New Year's Day Brunch	11am	3:30PM
2023-01-16	MLK Day Event	1200	1700
2023-03-17	St. Patrick's Day Parade	9a	5p

File may contain optional column names for the following event properties:

Event sponsor
- Recommended column name sponsor
Event location
- Recommended column name location
Event description
- Recommended column name about

Example CSV

date	name	start	end	location	sponsor	about
2023-01-01	New Year's Day Brunch	11am	3:30PM	Someplace fancy	The New Year Committee	Green eggs and ham
2023-01-16	MLK Day Event	1200	1700	Central Park	Parks Department	Many speakers
2023-03-17	St. Patrick's Day Parade	9a	5p	5th Ave	Guinness	Long walk

CSV columns may alternatively be mapped to the required format

Use the CsvEventCalendar.Options.csvColumns constructor option when creating an instance of CsvEventCalendar

Example CSV

Event date	Title	Begins	Ends	Address	Sponsor	Description
2023-01-01	New Year's Day Brunch	11am	3:30PM	Someplace fancy	The New Year Committee	Green eggs and ham
2023-01-16	MLK Day Event	1200	1700	Central Park	Parks Department	Many speakers
2023-03-17	St. Patrick's Day Parade	9a	5p	5th Ave	Guinness	Long walk

Column mappings

var calendar = new CsvEventCalendar({
  target: '#calendar-demo',
  url: './calendar.csv',
  timeZone: 'America/New_York',
  csvColumns: {
    date: 'Event date',
    name: 'Title',
    about: 'Description',
    start: 'Begins',
    end: 'Ends',
    location: 'Address',
    sponsor: 'Sponsor'
  }
});

File may contain additional column names as necessary for the specific implementation

All additional CSV columns will become CalendarEvent properties
Use the CsvEventCalendar.Options.eventHtml constructor option when creating an instance of CsvEventCalendar to alter the HTML rendering of events

Example CSV

date	name	start	end	url
2023-01-01	New Year's Day Brunch	11am	3:30PM	https://new.year.day/
2023-01-16	MLK Day Event	1200	1700	https://mlk.2023.day/
2023-03-17	St. Patrick's Day Parade	9a	5p	https://weargreen.org

Specify an `eventHtml` function

var calendar = new CsvEventCalendar({
  target: '#calendar-demo', 
  url: './calendar.csv',
  timeZone: 'America/New_York',
  eventHtml: function() {
    var html = CalendarEvent.prototype.html.call(this);
    var a = $('<a></a>')
      .html('Find out more...')
      .attr('href', this.url);
    return html.append(a);
  }
});