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@nerdworks/event-calendar-core

v2.6.2

Published

Full-sized drag & drop event calendar with resource view

Downloads

20

Readme

Event Calendar npm

See demo and changelog.

Full-sized drag & drop JavaScript event calendar with resource view:

  • Lightweight (33kb br compressed)
  • Zero-dependency (pre-built bundle)
  • Used on over 70,000 websites with Bookly

Inspired by FullCalendar, implements similar options.

Table of contents

Usage

Svelte component / ES6 module

The first step is to install the Event Calendar core package:

npm install --save-dev @event-calendar/core

Then install any additional plugins you plan to use:

npm install --save-dev @event-calendar/time-grid

You must use at least one plugin that provides a view. The following plugins are currently available:

  • @event-calendar/day-grid
  • @event-calendar/list
  • @event-calendar/resource-time-grid
  • @event-calendar/time-grid
  • @event-calendar/interaction (doesn't provide a view)

Then, in your Svelte component, use the calendar something like this:

<script>
    import Calendar from '@event-calendar/core';
    import TimeGrid from '@event-calendar/time-grid';

    let plugins = [TimeGrid];
    let options = {
        view: 'timeGridWeek',
        events: [
            // your list of events
        ]
    };
</script>

<Calendar {plugins} {options} />

Or in ES6 module:

import Calendar from '@event-calendar/core';
import TimeGrid from '@event-calendar/time-grid';

let ec = new Calendar({
    target: document.getElementById('ec'),
    props: {
        plugins: [TimeGrid],
        options: {
            view: 'timeGridWeek',
            events: [
                // your list of events
            ]
        }
    }
});

The CSS is located at @event-calendar/core/index.css. If your build tool supports CSS processing, you can import it like this:

import '@event-calendar/core/index.css';

Pre-built browser ready bundle

Include the following lines of code in the <head> section of your page:

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@event-calendar/[email protected]/event-calendar.min.css">
<script src="https://cdn.jsdelivr.net/npm/@event-calendar/[email protected]/event-calendar.min.js"></script>

Please note that the file paths contain an indication of a specific version of the library. You can remove this indication, then the latest version will be loaded:

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@event-calendar/build/event-calendar.min.css">
<script src="https://cdn.jsdelivr.net/npm/@event-calendar/build/event-calendar.min.js"></script>

But it is recommended to always specify the version and explicitly update it if necessary, in order to avoid unpredictable problems when a new version of the library is released.

Then initialize the calendar with something like this:

let ec = new EventCalendar(document.getElementById('ec'), {
    view: 'timeGridWeek',
    events: [
        // your list of events
    ]
});

Modifying options after initialization

You can modify the calendar options after initialization using the setOption method.

ec.setOption('slotDuration', '01:00');

In Svelte, you can simply update the original options object.

<script>
    import Calendar from '@event-calendar/core';
    import TimeGrid from '@event-calendar/time-grid';

    let plugins = [TimeGrid];
    let options = {
        view: 'timeGridWeek'
    };

    function updateOptions() {
        options.slotDuration = '01:00';
    }
</script>

<button on:click={updateOptions}>Change slot duration</button>
<Calendar {plugins} {options} />

Options

allDayContent

  • Type Content or function
  • Default 'all-day'

Defines the content that is displayed as a title of the all-day slot.

This value can be either a Content or a function that returns content:

function (arg) {
    // return Content
}

arg is an object with the following properties:

text

The default text

allDaySlot

  • Type boolean
  • Default true

Determines whether the all-day slot is displayed at the top of the calendar.

When hidden with false, all-day events will not be displayed in timeGrid/resourceTimeGrid views.

buttonText

  • Type object or function
  • Default {close: 'Close', dayGridMonth: 'month', listDay: 'list', listMonth: 'list', listWeek: 'list', listYear: 'list', resourceTimeGridDay: 'day', resourceTimeGridWeek: 'week', timeGridDay: 'day', timeGridWeek: 'week', today: 'today'}

Views override the default value as follows:

  • dayGridMonth text => ({...text, next: 'Next month', prev: 'Previous month'})
  • listDay text => ({...text, next: 'Next day', prev: 'Previous day'})
  • listMonth text => ({...text, next: 'Next month', prev: 'Previous month'})
  • listWeek text => ({...text, next: 'Next week', prev: 'Previous week'})
  • listYear text => ({...text, next: 'Next year', prev: 'Previous year'})
  • resourceTimeGridDay text => ({...text, next: 'Next day', prev: 'Previous day'})
  • resourceTimeGridWeek text => ({...text, next: 'Next week', prev: 'Previous week'})
  • timeGridDay text => ({...text, next: 'Next day', prev: 'Previous day'})
  • timeGridWeek text => ({...text, next: 'Next week', prev: 'Previous week'})

Text that is displayed in buttons of the header toolbar.

This value can be either a plain object with all necessary properties, or a callback function that receives default button text object and should return a new one:

function (text) {
  // return new button text object
}

text

date

  • Type Date or string
  • Default new Date()

Date that is currently displayed on the calendar.

This value can be either a JavaScript Date object, or an ISO8601 date string like '2022-12-31'.

dateClick

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when the user clicks on a date or a time.

function (info) {}

info is an object with the following properties:

date

dateStr

allDay

true or false. Determines if the click has occurred in the all-day slot. Month and list views are also considered as all-day slots

dayEl

jsEvent

view

The current View object

resource

If the current view is a resource view, the Resource object that owns this date

datesAboveResources

  • Type boolean
  • Default false

Determines whether the resource view should render the date headings above the resource headings.

datesSet

  • Type function
  • Default undefined

Callback function that is triggered when the date range of the calendar was originally set or changed by clicking the previous/next buttons, changing the view, manipulating the current date via the API, etc.

function (info) {}

info is an object with the following properties:

start

end

startStr

endStr

view

The current View object

dayCellFormat

  • Type object or function
  • Default {day: 'numeric'}

Defines the text that is displayed inside the day cell in the dayGrid view.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (date) {
  // return Content with the formatted date string
}

date

dayHeaderAriaLabelFormat

  • Type object or function
  • Default {dateStyle: 'long'}

Views override the default value as follows:

  • dayGridMonth {weekday: 'long'}

Defines the text that is used inside the aria-label attribute in calendar column headings.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns formatted string:

function (date) {
    // return formatted date string
}

date

dayHeaderFormat

  • Type object or function
  • Default {weekday: 'short', month: 'numeric', day: 'numeric'}

Views override the default value as follows:

  • dayGridMonth {weekday: 'short'}
  • timeGridDay {weekday: 'long'}

Defines the text that is displayed on the calendar’s column headings.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (date) {
    // return Content with the formatted date string
}

date

dayMaxEvents

  • Type boolean
  • Default false

Determines the maximum number of stacked event levels for a given day in the dayGrid view.

If there are too many events, a link like +2 more is displayed.

Currently, only the value true is supported, which limits the number of events to the height of the day cell.

dayPopoverFormat

  • Type object or function
  • Default {month: 'long', day: 'numeric', year: 'numeric'}

Defines the date format of title of the popover created by the dayMaxEvents option.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (date) {
    // return Content with the formatted date string
}

displayEventEnd

  • Type boolean
  • Default true

Views override the default value as follows:

  • dayGridMonth false

Determines whether to display an event’s end time.

dragScroll

  • Type boolean
  • Default true
  • Requires Interaction plugin

Determines whether the calendar should automatically scroll during the event drag-and-drop when the mouse crosses the edge.

duration

  • Type string, integer or object
  • Default {weeks: 1}

Views override the default value as follows:

  • dayGridMonth {months: 1}
  • listDay {days: 1}
  • listWeek {weeks: 1}
  • listMonth {months: 1}
  • listYear {years: 1}
  • resourceTimeGridDay {days: 1}
  • resourceTimeGridWeek {weeks: 1}
  • timeGridDay {days: 1}
  • timeGridWeek {weeks: 1}

Sets the duration of a view.

This should be a value that can be parsed into a Duration object.

editable

  • Type boolean
  • Default false
  • Requires Interaction plugin

Determines whether the events on the calendar can be dragged and resized (both at the same time).

If you don't need both, use the more specific eventStartEditable and eventDurationEditable instead.

events

  • Type Array
  • Default []

Array of plain objects that will be parsed into Event objects and displayed on the calendar.

This option is not used if the eventSources option is provided.

eventAllUpdated

  • Type function
  • Default undefined

Callback function that is triggered when all events have finished updating.

This is an experimental feature and its behavior may change in the future. The function is called at the end of the cycle of rendering all events. The rendering occurs when new events are added, already displayed events are modified, or events are deleted.

function (info) { }

info is an object with the following properties:

view

The current View object

eventBackgroundColor

  • Type string
  • Default undefined

Sets the default background color for events on the calendar.

You can use any of the CSS color formats such '#f00', '#ff0000', 'rgb(255,0,0)', or 'red'.

eventClassNames

  • Type string, array or function
  • Default undefined

Sets additional CSS classes for events.

This value can be either a string containing class names 'class-1 class-2 ...', an array of strings ['class-1', 'class-2', ...] or a function that returns any of the above formats:

function (info) {
    // return string or array
}

info is an object with the following properties:

event

The associated Event object

view

The current View object

eventClick

  • Type function
  • Default undefined

Callback function that is triggered when the user clicks an event.

function (info) { }

info is an object with the following properties:

el

event

The associated Event object

jsEvent

view

The current View object

eventColor

  • Type string
  • Default undefined

This is currently an alias for the eventBackgroundColor.

eventContent

  • Type Content or function
  • Default undefined

Defines the content that is rendered inside an event’s element.

This value can be either a Content or a function that returns content:

function (info) {
    // return Content
}

info is an object with the following properties:

event

The associated Event object

timeText

view

The current View object

eventDidMount

  • Type function
  • Default undefined

Callback function that is triggered right after the element has been added to the DOM. If the event data changes, this is not called again.

function (info) { }

info is an object with the following properties:

el

event

The associated Event object

timeText

view

The current View object

eventDragMinDistance

  • Type integer
  • Default 5
  • Requires Interaction plugin

Defines how many pixels the user’s mouse must move before the event dragging begins.

eventDragStart

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when the event dragging begins.

function (info) { }

info is an object with the following properties:

event

The associated Event object

jsEvent

view

The current View object

eventDragStop

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when the event dragging stops.

It is triggered before the event’s information has been modified (if moved to a new date/time) and before the eventDrop callback is triggered.

function (info) { }

info is an object with the following properties:

event

The associated Event object

jsEvent

view

The current View object

eventDrop

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when dragging stops, and the event has moved to a different day/time.

It is triggered after the event’s information has been modified and after the eventDragStop callback has been triggered.

function (info) { }

info is an object with the following properties:

event

The associated Event object

oldEvent

An Event object that holds information about the event before the drop

oldResource

If the resource has changed, this is the Resource object the event came from. If the resource has not changed, this will be undefined

newResource

If the resource has changed, this is the Resource object the event went to. If the resource has not changed, this will be undefined

delta

A Duration object that represents the amount of time the event was moved by

revert

A function that, if called, reverts the event’s start/end date to the values before the drag

jsEvent

view

The current View object

eventDurationEditable

  • Type boolean
  • Default true
  • Requires Interaction plugin

Determines whether calendar events can be resized.

eventLongPressDelay

  • Type integer
  • Default undefined
  • Requires Interaction plugin

For touch devices, the amount of time (in milliseconds) the user must hold down a tap before the event becomes draggable/resizable.

If not specified, it falls back to longPressDelay.

eventMouseEnter

  • Type function
  • Default undefined

Callback function that is triggered when the user hovers over an event with the cursor (mouse pointer).

function (info) { }

info is an object with the following properties:

el

event

The associated Event object

jsEvent

view

The current View object

eventMouseLeave

  • Type function
  • Default undefined

Callback function that is triggered when the cursor (mouse pointer) is moved out of an event.

function (info) { }

info is an object with the following properties:

el

event

The associated Event object

jsEvent

view

The current View object

eventResize

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when resizing stops, and the duration of the event has changed.

It is triggered after the event’s information has been modified and after the eventResizeStop callback has been triggered.

function (info) { }

info is an object with the following properties:

event

The associated Event object

oldEvent

An Event object that holds information about the event before the resize

endDelta

A Duration object that represents the amount of time the event’s end date was moved by

revert

A function that, if called, reverts the event’s end date to the values before the resize

jsEvent

view

The current View object

eventResizeStart

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when the event resizing begins.

function (info) { }

info is an object with the following properties:

event

The associated Event object

jsEvent

view

The current View object

eventResizeStop

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when the event resizing stops.

It is triggered before the event’s information has been modified (if duration is changed) and before the eventResize callback is triggered.

function (info) { }

info is an object with the following properties:

event

The associated Event object

jsEvent

view

The current View object

eventSources

  • Type EventSource[]
  • Default []

Array of EventSource objects that will provide the Event Calendar with data about events.

This option is used instead of the events option.

EventSource should be an object with one of the following sets of properties:

1. Fetch events from a URL

url

A URL that the calendar will fetch Event objects from. HTTP requests with the following parameters will be sent to this URL whenever the calendar needs new event data

start

end

method

HTTP request method. Default 'GET'

extraParams

Other GET/POST data you want to send to the server. Can be a plain object or a function that returns an object. Default {}

2. Execute custom function

events

A custom function that is executed whenever the Event Calendar needs new event data.

function(fetchInfo, successCallback, failureCallback) { }

fetchInfo is an object with the following properties:

start

end

startStr

endStr

The successCallback function must be called by the custom function with an array of parsable Event objects.

If there is any failure (e.g., if an AJAX request fails), then call the failureCallback instead. It accepts an argument with information about the failure.

Instead of calling successCallback and failureCallback, you may return the resulting array of events or return a Promise (or thenable) object instead.

eventStartEditable

  • Type boolean
  • Default true
  • Requires Interaction plugin

Determines whether the events on the calendar can be dragged.

eventTimeFormat

  • Type object or function
  • Default {hour: 'numeric', minute: '2-digit'}

Defines the time-text that is displayed on each event.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (start, end) {
    // return Content with the formatted time string
}

start

end

eventTextColor

  • Type string
  • Default undefined

Sets the default text color for events on the calendar.

You can use any of the CSS color formats such '#f00', '#ff0000', 'rgb(255,0,0)', or 'red'.

filterResourcesWithEvents

  • Type boolean
  • Default false

Determines whether resources with no events for the current range should be hidden in the resource view.

firstDay

  • Type integer
  • Default 0

The day that each week begins at, where Sunday is 0, Monday is 1, etc. Saturday is 6.

flexibleSlotTimeLimits

  • Type boolean or object
  • Default false

Determines whether slotMinTime and slotMaxTime should automatically expand when an event goes out of bounds.

If set to true, then the decision on whether to expand the limits will be made based on the analysis of currently displayed events, but excluding background events.

If you want background events not to be ignored, then instead of true you can pass an object with the following properties:

eventFilter

A function to determine whether a given event should be taken into account or not.

function(event) {
    // return true or false
}

event

Event object to be analyzed.

The function must return true to have this event counted, or false to ignore it

headerToolbar

  • Type object
  • Default {start: 'title', center: '', end: 'today prev,next'}

Defines the buttons and title at the top of the calendar.

An object can be supplied with properties start,center,end. These properties contain strings with comma/space separated values. Values separated by a comma will be displayed adjacently. Values separated by a space will be displayed with a small gap in between. Strings can contain any of the following values:

title

prev

next

today

a view name like dayGridMonth

height

  • Type string
  • Default undefined

Defines the height of the entire calendar.

This should be a valid CSS value like '100%' or '600px'.

hiddenDays

  • Type Array
  • Default []

Exclude certain days-of-the-week from being displayed, where Sunday is 0, Monday is 1, etc. Saturday is 6.

highlightedDates

  • Type Array
  • Default []

Array of dates that need to be highlighted in the calendar.

Each date can be either an ISO8601 date string like '2022-12-31', or a JavaScript Date object.

lazyFetching

  • Type boolean
  • Default true

Determines when event fetching should occur.

When set to true (the default), the calendar will only fetch events when it absolutely needs to, minimizing HTTP requests. For example, say your calendar starts out in month view, in February. The Event Calendar will fetch events for the entire month of February and store them in its internal storage. Then, say the user switches to week view and begins browsing the weeks in February. The calendar will avoid fetching events because it already has this information stored.

When set to false, the calendar will fetch events any time the view is switched, or any time the current date changes (for example, as a result of the user clicking prev/next).

listDayFormat

  • Type object or function
  • Default {weekday: 'long'}

Defines the text on the left side of the day headings in list view.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (date) {
  // return Content with the formatted date string
}

date

listDaySideFormat

  • Type object or function
  • Default {year: 'numeric', month: 'long', day: 'numeric'}

Defines the text on the right side of the day headings in list view.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (date) {
  // return Content with the formatted date string
}

date

loading

  • Type function
  • Default undefined

Callback function that is triggered when event fetching starts/stops.

function (isLoading) { }

isLoading

true when the calendar begins fetching events, false when it’s done.

locale

  • Type string
  • Default undefined

Defines the locales parameter for the native JavaScript Intl.DateTimeFormat object that the Event Calendar uses to format date and time strings in options such as dayHeaderFormat, eventTimeFormat, etc.

longPressDelay

  • Type integer
  • Default 1000

For touch devices, the amount of time (in milliseconds) the user must hold down a tap before the event becomes draggable/resizable or the date becomes selectable.

For a more granular configuration, see eventLongPressDelay and selectLongPressDelay.

moreLinkContent

  • Type Content or function
  • Default undefined

Defines the text that is displayed instead of the default +2 more created by the dayMaxEvents option.

This value can be either a Content or a function that returns content:

function (arg) {
  // return Content
}

arg is an object with the following properties:

num

text

The default text like +2 more

noEventsClick

  • Type function
  • Default undefined

Callback function that is triggered when the user clicks No events area in list view.

function (info) { }

info is an object with the following properties:

jsEvent

view

The current View object

noEventsContent

  • Type Content or function
  • Default 'No events'

Defines the text that is displayed in list view when there are no events to display.

This value can be either a Content or a function that returns content:

function () {
  // return Content
}

nowIndicator

  • Type boolean
  • Default false

Enables a marker indicating the current time in timeGrid/resourceTimeGrid views.

pointer

  • Type boolean
  • Default false
  • Requires Interaction plugin

Enables mouse cursor pointer in timeGrid/resourceTimeGrid views.

resources

  • Type Array
  • Default []

Array of plain objects that will be parsed into Resource objects for displaying in the resource view.

resourceLabelContent

  • Type string, objector function
  • Default undefined

Defines the content that is rendered inside an element with a resource title.

This value can be either a Content or a function that returns content:

function (info) {
    // return Content
}

info is an object with the following properties:

resource

The associated Resource object

date

resourceLabelDidMount

  • Type function
  • Default undefined

Callback function that is triggered right after the element has been added to the DOM. If the resource data changes, this is not called again.

function (info) { }

info is an object with the following properties:

el

resource

The associated Resource object

date

select

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when a date/time selection is made.

function (info) { }

info is an object with the following properties:

start

end

startStr

endStr

allDay

true or false. Determines if the selection has occurred in the all-day slot

jsEvent

view

The current View object

resource

If the current view is a resource view, the Resource object that was selected

selectable

  • Type boolean
  • Default false
  • Requires Interaction plugin

Determines whether the user is allowed to highlight multiple days or time slots by clicking and moving the pointer.

selectBackgroundColor

  • Type string
  • Default undefined
  • Requires Interaction plugin

Sets the background color for the event indicating the current selection. See selectable.

You can use any of the CSS color formats such '#f00', '#ff0000', 'rgb(255,0,0)', or 'red'.

selectLongPressDelay

  • Type integer
  • Default undefined
  • Requires Interaction plugin

For touch devices, the amount of time (in milliseconds) the user must hold down a tap before the date becomes selectable.

If not specified, it falls back to longPressDelay.

selectMinDistance

  • Type integer
  • Default 5
  • Requires Interaction plugin

Defines how many pixels the user’s mouse must move before the selection begins.

scrollTime

  • Type string, integer or object
  • Default '06:00:00'

Determines how far forward the scroll pane is initially scrolled.

This should be a value that can be parsed into a Duration object.

slotDuration

  • Type string, integer or object
  • Default '00:30:00'

Defines the frequency for displaying time slots.

This should be a value that can be parsed into a Duration object.

slotEventOverlap

  • Type boolean
  • Default true

Determines whether events in the timeGrid/resourceTimeGrid views should visually overlap when they intersect in time.

If set to false, then intersecting events will be placed next to each other.

slotHeight

  • Type integer
  • Default 24

Defines the time slot height in pixels. When changing the setting, you must additionally override the following CSS styles:

.ec-time, .ec-line {
  height: 24px;  /* override this value */
}

slotLabelFormat

  • Type object or function
  • Default {hour: 'numeric', minute: '2-digit'}

Defines the text that will be displayed within a time slot.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (time) {
  // return Content with the formatted time string
}

time

slotMaxTime

  • Type string, integer or object
  • Default '24:00:00'

Defines the last time slot that will be displayed for each day.

This should be a value that can be parsed into a Duration object.

slotMinTime

  • Type string, integer or object
  • Default '00:00:00'

Defines the first time slot that will be displayed for each day.

This should be a value that can be parsed into a Duration object.

theme

  • Type object or function
  • Default {active: 'ec-active', allDay: 'ec-all-day', bgEvent: 'ec-bg-event', bgEvents: 'ec-bg-events', body: 'ec-body', button: 'ec-button', buttonGroup: 'ec-button-group', calendar: 'ec', compact: 'ec-compact', content: 'ec-content', day: 'ec-day', dayFoot: 'ec-day-foot', dayHead: 'ec-day-head', daySide: 'ec-day-side', days: 'ec-days', draggable: 'ec-draggable', dragging: 'ec-dragging', event: 'ec-event', eventBody: 'ec-event-body', eventTag: 'ec-event-tag', eventTime: 'ec-event-time', eventTitle: 'ec-event-title', events: 'ec-events', extra: 'ec-extra', ghost: 'ec-ghost', handle: 'ec-handle', header: 'ec-header', hiddenScroll: 'ec-hidden-scroll', highlight: 'ec-highlight', icon: 'ec-icon', line: 'ec-line', lines: 'ec-lines', noEvents: 'ec-no-events', nowIndicator: 'ec-now-indicator', otherMonth: 'ec-other-month', pointer: 'ec-pointer', popup: 'ec-popup', preview: 'ec-preview', resizer: 'ec-resizer', resizingX: 'ec-resizing-x', resizingY: 'ec-resizing-y', resource: 'ec-resource', resourceTitle: 'ec-resource-title', selecting: 'ec-selecting', sidebar: 'ec-sidebar', sidebarTitle: 'ec-sidebar-title', time: 'ec-time', title: 'ec-title', today: 'ec-today', toolbar: 'ec-toolbar', uniform: 'ec-uniform', view: '', weekdays: ['ec-sun', 'ec-mon', 'ec-tue', 'ec-wed', 'ec-thu', 'ec-fri', 'ec-sat'], withScroll: 'ec-with-scroll'}

Views override the default value as follows:

  • dayGridMonth theme => ({...theme, view: 'ec-day-grid ec-month-view'})
  • listDay theme => ({...theme, view: 'ec-list ec-day-view'})
  • listMonth theme => ({...theme, view: 'ec-list ec-month-view'})
  • listWeek theme => ({...theme, view: 'ec-list ec-week-view'})
  • listYear theme => ({...theme, view: 'ec-list ec-year-view'})
  • resourceTimeGridDay theme => ({...theme, view: 'ec-time-grid ec-resource-day-view'})
  • resourceTimeGridWeek theme => ({...theme, view: 'ec-time-grid ec-resource-week-view'})
  • timeGridDay theme => ({...theme, view: 'ec-time-grid ec-day-view'})
  • timeGridWeek theme => ({...theme, view: 'ec-time-grid ec-week-view'})

Defines the CSS classes that the Event Calendar uses to generate HTML markup.

This value can be either a plain object with all necessary properties, or a callback function that receives default theme object and should return a new one:

function (theme) {
  // return actual theme object
}

theme

titleFormat

  • Type object or function
  • Default {year: 'numeric', month: 'short', day: 'numeric'}

Views override the default value as follows:

  • dayGridMonth {year: 'numeric', month: 'long'}
  • timeGridDay {year: 'numeric', month: 'long', day: 'numeric'}

Defines the text that is displayed in the header toolbar’s title.

This value can be either an object with options for the native JavaScript Intl.DateTimeFormat object, or a callback function that returns a Content with the formatted string:

function (start, end) {
  // return Content with the formatted date string
}

start

end

unselect

  • Type function
  • Default undefined
  • Requires Interaction plugin

Callback function that is triggered when the current selection is cleared.

A selection can be cleared for a number of reasons:

  • The user clicks away from the current selection (this does not happen when unselectAuto is false).
  • The user makes a new selection. The unselect callback will be fired before the new selection occurs.
  • The user navigates forward or backward in the current view, or switches to a new view.
  • The unselect method is called via the API.
function (info) { }

info is an object with the following properties:

jsEvent

JavaScript native event object with low-level information such as click coordinates.

If unselect has been triggered via the unselect method, jsEvent will be undefined

view

The current View object

unselectAuto

  • Type boolean
  • Default true
  • Requires Interaction plugin

Determines whether clicking elsewhere on the page will clear the current selection. See selectable.

unselectCancel

  • Type string
  • Default ''
  • Requires Interaction plugin

A CSS selector that specifies elements that will ignore the unselectAuto option.

Clicking on elements that match this CSS selector will prevent the current selection from being cleared (because of the unselectAuto option).

view

  • Type string
  • Default 'resourceTimeGridWeek'

The view that is displayed in the calendar. Can be 'dayGridMonth', 'listDay', 'listWeek', 'listMonth', 'listYear', 'resourceTimeGridDay', 'resourceTimeGridWeek', 'timeGridDay' or 'timeGridWeek'.

viewDidMount

  • Type function
  • Default undefined

Callback function that is triggered right after the view has been added to the DOM.

function (info) { }

info is an object with the following properties:

view

The mounted View object

views

  • Type object
  • Default {}

You can specify options that apply only to specific views. To do so provide separate options objects within the views option, keyed by the name of the view.

Methods

Methods allow you to manipulate the Event Calendar after initialization. They are accessible from the calendar instance.

In Svelte, methods are available from a component instance:

<script>
    import Calendar from '@event-calendar/core';
    import TimeGrid from '@event-calendar/time-grid';

    let ec;
    let plugins = [TimeGrid];
    let options = {
        view: 'timeGridWeek',
        eventSources: [{events: function() {
            console.log('fetching...');
            return [];
        }}]
    };

    function invokeMethod() {
        ec.refetchEvents();
    }
</script>

<button on:click={invokeMethod}>Refetch events</button>
<Calendar bind:this={ec} {plugins} {options} />

getOption( name )

  • Parameters
    • name string The option name
  • Return value mixed or undefined

This method allows you to get the current value of any calendar option.

// E.g. Get current date
let date = ec.getOption('date');

setOption( name, value )

  • Parameters
    • name string The option name
    • value mixed The new option value
  • Return value EventCalendar The calendar instance for chaining

This method allows you to set new value to any calendar option.

// E.g. Change the current date
ec.setOption('date', new Date());

getEvents()

  • Return value Event[] Array of Event objects

Returns an array of events that the calendar has in memory.

getEventById( id )

  • Parameters
    • id string|integer The ID of the event
  • Return value Event object or null

Returns a single event with the matching id.

removeEventById( id )

  • Parameters
    • id string|integer The ID of the event
  • Return value EventCalendar The calendar instance for chaining

Removes a single event with the matching id.

addEvent( event )

  • Parameters
    • event object A plain object that will be parsed into an Event object
  • Return value Event object or null

Adds a new event to the calendar.

updateEvent( event )

  • Parameters
    • event object A plain object or Event object
  • Return value EventCalendar The calendar instance for chaining

Updates a single event with the matching event.id.

refetchEvents()

  • Return value EventCalendar The calendar instance for chaining

Refetches events from all sources.

dateFromPoint( x, y )

  • Return value object or null

Returns an info object with data as if the dateClick event had fired for that point.

info object contains the following properties:

date

allDay

true or false. Determines if the point is in the all-day slot. Month and list views are also considered as all-day slots

dayEl

resource

If the current view is a resource view, the Resource object that owns this date

Using this method, you can, for example, find out on which day a click occurred inside a multi-day event. To do this, inside eventClick, pass the jsEvent.clientX and jsEvent.clientY coordinates to dateFromPoint and get the desired date.

destroy()

  • Return value undefined

Destroys the calendar, removing all DOM elements, event handlers, and internal data.

getView()

  • Return value View

Returns the View object for the current view.

unselect()

  • Return value EventCalendar The calendar instance for chaining

Clears the current selection. See selectable.

Content

The content value can be presented in the following forms:

  • a string containing text 'some text'
  • an object containing the HTML string {html: '<p>some HTML</p>'}
  • an object containing an array of DOM nodes {domNodes: [node1, node2, ...]}

Event object

This is a JavaScript object that the Event Calendar uses to store information about a calendar event.

Here are all properties that exist in Event object:

id

resourceIds

allDay

true or false. Determines if the event is shown in the all-day slot

start

end

title

Content The text appearing on the event. See Content

editable

true, false or undefined. The value overriding the editable setting for this specific event

startEditable

true, false or undefined. The value overriding the eventStartEditable setting for this specific event

durationEditable

true, false or undefined. The value overriding the eventDurationEditable setting for this specific event

display

The rendering type of the event. Can be 'auto' or 'background'

In addition, in your callback functions, you may get the 'ghost', 'preview' and 'pointer' for this property, which are internal values and are used, for example, to display events during drag-and-drop operations

backgroundColor

The eventBackgroundColor override for this specific event

textColor

The eventTextColor override for this specific event

extendedProps

A plain object holding miscellaneous properties specified during parsing in the explicitly given extendedProps field

Parsing event from a plain object

When Event Calendar receives an array of plain event’s objects either from the events option or as a result of an HTTP request to a URL of an event source, it parses the input objects into proper Event objects.

Here are all admissible fields for the event’s input object:

id

string or integer A unique identifier of the event. Default auto-generated value

resourceId

string or integer An ID of a resource that the event is associated with. This field is not used if resourceIds is provided. Default undefined

resourceIds

Array An array of resource IDs that the event is associated with. This field is used instead of resourceId. Default []

allDay

boolean Determines if the event is shown in the all-day slot. Defaults to true if start and end are both passed without a time part, false otherwise

start

string or Date This should be either an ISO8601 datetime string like '2022-12-31 09:00:00', or a JavaScript Date object holding the event’s start time

end

string or Date This should be either an ISO8601 datetime string like '2022-12-31 13:00:00', or a JavaScript Date object holding the event’s end time

title

Content The text that will appear on the event. See Content. Default ''

editable

boolean Overrides the master editable option for this single event. Default undefined

startEditable

boolean Overrides the master eventStartEditable option for this single event. Default undefined

display

string The rendering type of the event. Can be 'auto' or 'background'. Default 'auto'

backgroundColor

string Sets the event’s background color just like the calendar-wide eventBackgroundColor option. Default undefined

textColor

string Sets the event’s text color just like the calendar-wide eventTextColor option. Default undefined

color

string This is currently an alias for the backgroundColor field. Default undefined

extendedProps

object A plain object with any miscellaneous properties. It will be directly transferred to the extendedProps property of the Event object. Default {}

Duration object

This is a JavaScript object that the Event Calendar uses to store information about a period of time, like 30 minutes or 1 day and 6 hours.

Here are all properties that exist in Duration object:

years

months

days

seconds

inWeeks

Parsing duration from input values

When Event Calendar receives a value for options like duration, scrollTime, slotDuration and others, it parses it into a proper Duration object.

The admissible input value can be specified in one of three formats:

  • an object with any of the following keys: year, years, month, months, day, days, minute, minutes, second, seconds
  • a string in the format hh:mm:ss or hh:mm. For example, '05:00' specifies 5 hours
  • an integer specifying the total number of seconds

Resource object

This is a JavaScript object that the Event Calendar uses to store information about a resource. Calendar events can be associated with resources and displayed separately using the resource view.

Here are all properties that exist in Resource object:

id

title

The title of the resource. See Content.

eventBackgroundColor

eventTextColor

Parsing resource from a plain object

When Event Calendar receives an array of plain resource’s objects for the resources option, it parses the input objects into proper Resource objects.

Here are all admissible fields for the resource’s input object:

id

integer or string Uniquely identifies the resource. Event objects with a corresponding resourceIds field will be linked to this resource. Will be coerced into a string

title

Content Text that will be displayed on the resource when it is rendered. See Content. Default ''

eventBackgroundColor

string Sets the default background color for this resource's events just like the calendar-wide eventBackgroundColor option. Default undefined

eventTextColor

string Sets the default text color for this resource's events just like the calendar-wide eventTextColor option. Default undefined

View object

A View object contains information about a calendar view, such as title and date range.

Here are all properties that exist in View object:

type

title

currentStart

currentEnd

activeStart

activeEnd

Theming

The library provides a built-in dark theme. You can activate it by adding the ec-dark CSS class to any parent element of the calendar, e.g. <body class="ec-dark">.

If you want the dark theme to be activated automatically based on the preferred color scheme, then use the ec-auto-dark CSS class instead.

Please note that the dark theme does not change the background and font color in the calendar. These are assumed to be set by the page styles, and the calendar inherits these styles.

If you do need to set the background or font color of the calendar, use local CSS variables for this:

.ec {
  --ec-bg-color: #22272e;
  --ec-text-color: #adbac7;
}

A list of all available CSS variables can be found here.

Browser support

The latest versions of Chrome, Firefox, Safari, and Edge are supported.

The library is compiled to support browsers that match the following browserslist configuration: defaults and supports fetch. You can see the resulting list here.