Slot Picker

Required plan: Emerging

The Slot Picker Element is an embeddable version of the Real Time Scheduling interface. It converts an Availability query into a list of bookable slots.

When a user confirms a slot, the Element passes that slot’s details into a callback function (provided when the Element is initialized).

Demo #

Example initialization #

<div id="cronofy-slot-picker"></div>
<script src="https://elements.cronofy.com/js/CronofyElements.v1.66.2.js"></script>
<script>
    CronofyElements.SlotPicker({
        element_token: "{ELEMENT_TOKEN}",
        target_id: "cronofy-slot-picker",
        availability_query: {
            participants: [
                {
                    required: "all",
                    members: [
                        { sub: "acc_5ba21743f408617d1269ea1e" },
                        { sub: "acc_64b17d868090ea21640c914c" }
                    ]
                }
            ],
            required_duration: { minutes: 30 },
            query_periods: [
                { start: "2025-10-28T09:00:00Z", end: "2025-10-28T17:00:00Z" },
                { start: "2025-10-29T09:00:00Z", end: "2025-10-29T17:00:00Z" }
            ]
        },
        styles: {
            prefix: "custom-name"
        },
        callback: notification => console.log("callback", notification)
    });
</script>

Element permissions #

availability is required when generating the Element Token.

Element options #

element_token required #

The Element Token the Slot Picker will use to communicate with Cronofy.

Not required if the Element is activated in demo mode.

target_id required #

The ID of the DOM node the Element will be loaded in to.

availability_query required #

Object that matches a valid Cronofy Availability request.

Using the Slot Picker with Bookable Events

It is possible to use the Slot Picker to display Bookable Events. To do so, use a Bookable Events availability query in place of a standard query.

You will also need to add a bookable_event_ids value when creating your Element Token.

Note that if the event IDs provided are not found, then the Slot Picker will load in an error state (showing the “There was an error loading the element” message to users). Event IDs may not be found either because the events do not exist or because the Slot Picker element token does not have the correct permissions to view the events.

Using response_format

The default behaviour will use response_format: "overlapping_slots" to allow slots to overlap. You may provide response_format: "slots" to prevent this. Other response_format options are invalid when using the Slot Picker Element.

callback required #

The function to be called when an action has occurred within the Element. Receives an object in the format:

{
    "notification": {
        "type": "notification_type"
    }
}

The object will always include a notification object with a type attribute to allow you to determine how to handle it. Your application should ignore notifications it does not understand as new ones may be added in the future.

slot_selected

Sent by the Element when in the confirm mode after the user has confirmed their selection, and straight away when the slot is selected in no_confirm mode.

{
    "notification": {
        "type": "slot_selected"
        "slot": {
            "start": "2025-10-28T09:00:00Z",
            "end": "2025-10-28T11:00:00Z",
            "participants": [
                { "sub": "acc_5ba21743f408617d1269ea1e" },
                { "sub": "acc_64b17d868090ea21640c914c" }
            ]
        }
    }
}

no_slots_found

Sent by the Element when the provided availability_query has returned no available slots.

{
    "notification": {
        "type": "no_slots_found"
    }
}

data_center optional #

Designates the Cronofy data center the Element will communicate with.

Default value is us.

config optional #

Use this object to add further configuration to the Element:

config.mode optional #

The Slot Picker Element has two “modes” it can operate in:

confirm (default)
no_confirm

When in confirm mode, clicking a slot displays a confirmation view that allows a user to confirm their selection or return to the list of slots. The callback function will be called with a slot_selected notification when a user confirms their selected slot.

When in no_confirm mode, the “confirmation” step is skipped. In this mode, the callback function will be passed a slot_selected notification when a user selects a slot, without any confirmation step.

config.logs optional #

Set the level of logging you want to appear in the console:

info: show verbose logging (recommended for development use only).
warn: (default) only log errors and warnings.
error: only log errors.
none: suppress all console output from the Element.

confirm optional #

Boolean that defines if an extra “confirmation” step is used after a user selects a slot from the list. Defaults to true.

styles optional #

An object that controls the pre-packaged element styles.

styles.prefix optional #

Customizable elements are given a prefixed class name using this value. For example, if the prefix was set as “Foo”, the class name on a slot element would be Foo__slot.

Defaults to SlotPicker.

styles.padding optional #

The size of the padding around the edge of the element. Defaults to 1em.

demo optional #

Boolean to activate demo-mode. Defaults to false. If demo is set to true the Element will return mock data (and not make any API calls).

locale optional #

The Slot Picker supports localization (e.g. locale: "fr" to load in French). Defaults to browser language setting.

Supported locales (languages) for the UI Elements are:

ar Arabic
cs Czech
cy Welsh
de German
en US English (default)
es Spanish
fr French
fr-CA Canadian French
he Hebrew
it Italian
ja Japanese
nl Dutch
pl Polish
pt-BR Brazilian Portuguese
ru Russian
sv Swedish
tr Turkish
zh-CN Simplified Chinese

translations optional #

To override either a locale or a particular string, pass in a translations object here. The Slot Picker uses the slot_picker translation “context”.

tzid optional #

The time zone that the Slot Picker will be rendered in. Must be a known time zone identifier from the IANA Time Zone Database. If an invalid tzid is provided, then the Element will use the system time zone from the user’s browser and trigger a warn notification.

Be aware, using the tzid option will cause the Slot Picker to render in a timezone that may not match the timezone of the user’s computer. Be sure to highlight this to the user.

Element classes #

PREFIX default is SlotPicker

Available classes:

{PREFIX}__slots-header
{PREFIX}__slots-heading
{PREFIX}__slot--empty
{PREFIX}__slots-list
{PREFIX}__slots-list--days
{PREFIX}__slots-list--times
{PREFIX}__slots-list--empty
{PREFIX}__slot
{PREFIX}__slot--unavailble
{PREFIX}__slots-icon
{PREFIX}__slots-icon--back
{PREFIX}__slots-icon--tickmark
{PREFIX}__slots-icon--remove
{PREFIX}__confirmation-wrapper
{PREFIX}__confirmation
{PREFIX}__confirmation-summary
{PREFIX}__confirmation-buttons
{PREFIX}__confirmation-button

Element methods #

refresh() #

From time to time you may wish to reload the SlotPicker UI Element on the page. You can do this with the SlotPicker.refresh() method:

// Load SlotPicker Element:
const SlotPicker = CronofyElements.SlotPicker(optionsObject);

// Refresh the SlotPicker Element:
SlotPicker.refresh();

Being able to refresh a UI Element is useful in cases where your availability may have changed behind the scenes. UI Elements gather their availability data when they are first loaded, so unless they are refreshed they will not be aware of any changes to availability.

update() #

Should you need to update the options for any Element, you can reload them with the .update() method (this requires you to have saved your Element instance to a variable beforehand):

// Load SlotPicker Element:
const SlotPicker = CronofyElements.SlotPicker(optionsObject);

// Update the SlotPicker Element with new options:
SlotPicker.update(newOptions);

When updating, you do not need to redeclare all the options; you just need to add the ones you want to update.

Note: the SlotPicker.update() method must be called with an options object, otherwise a warning-level log notification will be fired.