DateComboBox

Combo box that lets the user type a date or pick one from a popup calendar
Demo: Demo

Overview

DateComboBox is a type of ComboBox. To its text input area, DateComboBox adds international locale-sensitive support for parsing and formatting dates. To help users select a date from a calendar, DateComboBox uses a CalendarMonthNavigator as the combo box's popup content.

Like all Elix calendar components, DateComboBox attempts to provide full international support.

Inferring a year from a typed date

If the user types a date but omits the year, DateComboBox infers a year. By default, this will be the current year.

However, in most cases, you will know ahead of time whether a DateComboBox will typically be used to enter dates in the future (for something the user wants to happen) or in the past (to record an event that has already happened). You can set the timeBias property to "future" or "past" to indicate this.

Example: the current date is July 1, the locale is "en-US", and the supplied value is "9/1" (September 1 in the U.S.), then if timeBias is not set, the parsed date will be September 1 of the present year. If timeBias is set to "past", the date is taken to be a past date, so the parsed date will be September 1 of the previous year.

timeBias = null, inferred year is current year

timeBias = "future", inferred year is in the future

timeBias = "past", inferred year is in the past

Demo: DateComboBox with different time bias settings

Usage

import DateComboBox from 'elix/define/DateComboBox.js';

Use DateComboBox in situations where you have limited screen real estate, or when you want to downplay the importance of selecting a date. In other situations, consider using an inline CalendarMonthNavigator.

See also

API

Ancestry: DateComboBox → ComboBoxPopupSourceReactiveElement → HTMLElement

Built with mixins AriaRoleMixin, AriaRoleMixin, AttributeMarshallingMixin, CalendarElementMixin, DelegateFocusMixin, DisabledMixin, FocusVisibleMixin, FormElementMixin, KeyboardMixin, KeyboardMixin, OpenCloseMixin, ReactiveMixin, and ShadowTemplateMixin.

The element defines the following shadow parts:

  • backdrop: the backdrop behind the overlay, default type is Hidden
  • calendar: the calendar showing dates to choose from, default type is CalendarMonthNavigator
  • day: any of the day elements in the month grid
  • day-names-header: the column header showing the names of the days
  • down-icon: the icon shown in the toggle button if the popup will open or close in the down direction
  • frame: the frame around the overlay, default type is OverlayFrame
  • input: the text input element, default type is AutoCompleteInput
  • month-days: the grid of days for the month
  • month-hear-header: the calendar header showing the month and/or year
  • popup: the popup element, default type is Popup
  • source: the element used as the reference point for positioning the popup, generally the element that invokes the popup, default type is div element
  • today-button: the button that will navigate to today in the calendar, default type is SeamlessButton
  • toggle-button: the button that toggles the popup, default type is SeamlessButton
  • up-icon: the icon shown in the toggle button if the popup will open or close in the up direction

arrowButtonPartType property

The class, tag, or template used to create the arrow-button parts - the left and right arrow buttons that navigate the calendar.

Type: (component class constructor)|HTMLTemplateElement|string

Default: ArrowDirectionButton

backdropPartType property

The class, tag, or template used for the backdrop part - the optional element shown behind the popup.

This can help focus the user's attention on the overlay content. Additionally, a backdrop can be used to absorb clicks on background page elements. For example, Dialog uses ModalBackdrop as an overlay backdrop in such a way.

Type: (component class constructor)|HTMLTemplateElement|string

Default: Backdrop

Defined by PopupSource

calendarPartType property

The class, tag, or template used to create the calendar part - the element showing a calendar with selectable days.

Type: (component class constructor)|HTMLTemplateElement|string

Default: CalendarMonthNavigator

close(closeResult) method

Close the component (if not already closed).

Some components like AlertDialog want to indicate why or how they were closed. To support such scenarios, you can supply a value to the optional closeResult parameter. This closeResult will be made available in the whenClosed promise and the state.closeResult member.

Parameters:

  • closeResult: objectan indication of how or why the element closed

Defined by OpenCloseMixin

closed property

True if the element is currently closed.

Type: boolean

Defined by OpenCloseMixin

closed event

Raised when the component closes.

Defined by OpenCloseMixin

closeFinished property

True if the element has completely closed.

For components not using asynchronous open/close effects, this property returns the same value as the closed property. For elements that have a true value of state.openCloseEffects (e.g., elements using TransitionEffectMixin), this property returns true only if state.effect is "close" and state.effectPhase is "after".

Type: boolean

Defined by OpenCloseMixin

date property

The date that should be shown by the element. For elements that show a range of dates (a month, a week, etc.), the referenced date will be included in the range.

This property can be set as a string, which will be parsed and converted to a JavaScript Date.

If not specified, the default date value is the current date.

Type: Date|string

Defined by CalendarElementMixin

date-changed event

Raised when the date property changes.

Defined by CalendarElementMixin

dayPartType property

The class, tag, or template used to create the day parts – the set of days shown in the calendar grid.

Type: (component class constructor)|HTMLTemplateElement|string

Default: CalendarDay

daysOfWeekFormat property

The format used to render the day names in the week days header.

The allowable formats are the same as the weekday formats in Intl.DateTimeFormat.

Type: 'long'|'narrow'|'short'

Default: 'short'

disabled property

True if the component is disabled, false (the default) if not.

The value of this property will be reflected to the disabled attribute so that it can be referenced in CSS. Note that this non-native implementation of the disabled attribute will not trigger the :disabled CSS pseudo-class, so your style rules will have to reference the presence or absence of the disabled attribute. That is, instead of writing

my-component:disabled { ... }

write this instead

my-component[disabled] { ... }

Like the native disabled attribute, this attribute is boolean. That means that it's existence in markup sets the attribute, even if set to an empty string or a string like "false".

Type: boolean

Default: false

Defined by DisabledMixin

form property

The ID of the form element with which this element is associated, or null if the element is not associated with any form. This is provided for consistency with the native HTML form property.

Type: string

Defined by FormElementMixin

framePartType property

The class, tag, or template used to create the frame part – the popup's primary content.

The frame element can be used to provide a border around the popup content, and to provide visual effects such as a drop-shadow to help distinguish popup content from background page elements.

Type: (component class constructor)|HTMLTemplateElement|string

Default: OverlayFrame

Defined by PopupSource

horizontalAlign property

The alignment of the popup with respect to the source button.

  • start: popup and source are aligned on the leading edge according to the text direction
  • end: popup and source are aligned on the trailing edge according to the text direction
  • left: popup and source are left-aligned
  • right: popup and source are right-aligned
  • `stretch: both left and right edges are aligned

Type: 'start'|'end'|'left'|'right'|'stretch'

Default: 'start'

Defined by PopupSource

input property

The combo box's input element.

Type: Element|null

Defined by ComboBox

inputPartType property

The class, tag, or template used to create the input part into which the user can enter text.

Type: (component class constructor)|HTMLTemplateElement|string

Default: 'input'

Defined by ComboBox

[internal.defaultState] property

The default state for the component. This can be extended by mixins and classes to provide additional default state.

Type: State

Defined by ReactiveMixin

[internal.delegatesFocus] property

Returns true if the component is delegating its focus.

A component using DelegateFocusMixin will always have this property be true unless a class takes measures to override it.

Type: boolean

Default: true

Defined by DelegateFocusMixin

[internal.ids] property

A convenient shortcut for looking up an element by ID in the component's Shadow DOM subtree.

Example: if component's template contains a shadow element <button id="foo">, you can use the reference this[internal.ids].foo to obtain the corresponding button in the component instance's shadow tree. The ids property is simply a shorthand for getElementById, so this[internal.ids].foo is the same as this.shadowRoot.getElementById('foo').

Type: object

Defined by ShadowTemplateMixin

[internal.keydown]() method

See the symbols documentation for details.

Defined by KeyboardMixin

[internal.render](changed) method

Render the indicated changes in state to the DOM.

The default implementation of this method does nothing. Override this method in your component to update your component's host element and any shadow elements to reflect the component's new state. See the rendering example.

Be sure to call super in your method implementation so that your component's base classes and mixins have a chance to perform their own render work.

Parameters:

  • changed: objectdictionary of flags indicating which state members have changed since the last render

Defined by ReactiveMixin

[internal.renderChanges]() method

Render any pending component changes to the DOM.

This method does nothing if the state has not changed since the last render call.

ReactiveMixin will invoke this method following a setState call; you should not need to invoke this method yourself.

This method invokes all internal render methods, then invokes componentDidMount (for first render) or componentDidUpdate (for subsequent renders).

Defined by ReactiveMixin

[internal.setState](changes) method

Update the component's state by merging the specified changes on top of the existing state. If the component is connected to the document, and the new state has changed, this returns a promise to asynchronously render the component. Otherwise, this returns a resolved promise.

Parameters:

  • changes: objectthe changes to apply to the element's state

Returns: Promise - resolves when the new state has been rendered

Defined by ReactiveMixin

[internal.state] property

The component's current state.

The returned state object is immutable. To update it, invoke internal.setState.

It's extremely useful to be able to inspect component state while debugging. If you append ?elixdebug=true to a page's URL, then ReactiveMixin will conditionally expose a public state property that returns the component's state. You can then access the state in your browser's debug console.

Type: State

Defined by ReactiveMixin

locale property

A string that identifies a language and a region using a BCP 47 language tag. This is the same format used by to identify a locale in the standard Intl internationalization API. See the locales argument documentation for details.

Calendar elements are region-sensitive, so language alone is insufficient. Accordingly, the locale should identify at least a language and a region. Examples: "en-US" identifies US English, while "en-GB" identifies English in Great Britain. The use of "en" on its own would be insufficient.

Type: string

Defined by CalendarElementMixin

monthFormat property

The format used to render the month name.

The allowable formats are the same as the month formats in Intl.DateTimeFormat.

Type: 'numeric'|'2-digit'|'long'|'short'|'narrow'

Default: 'long'

name property

The name of the form field that will be filled with this element's value. This is an analogue of the standard HTML name property.

Type: string

Defined by FormElementMixin

open() method

Open the element (if not already opened).

Defined by OpenCloseMixin

opened property

True if the element is currently opened.

Type: boolean

Defined by OpenCloseMixin

opened event

Raised when the component opens.

Defined by OpenCloseMixin

opened-changed event

Raised when the opened/closed state of the component changes.

Defined by OpenCloseMixin

placeholder property

The prompt text shown in the input if it is empty.

Type: string

Defined by ComboBox

popupPartType property

The class, tag, or template used to create the popup part – the element responsible for displaying the popup and handling overlay behavior.

Type: (component class constructor)|HTMLTemplateElement|string

Default: Popup

Defined by PopupSource

popupPosition property

The preferred direction for the popup.

  • above: popup should appear above the source
  • below: popup should appear below the source

Type: 'above'|'below'

Default: 'below'

Defined by PopupSource

sourcePartType property

The class, tag, or template used to create the source part - the button (or other element) the user can tap/click to invoke the popup.

Type: (component class constructor)|HTMLTemplateElement|string

Default: 'button'

Defined by PopupSource

suppressFocusVisibility() method

Temporarily suppress visibility of the keyboard focus until the next keydown event.

This can be useful in components like Menu that actively manage where the focus is in response to mouse hover activity. If the user uses the keyboard to invoke a menu, then changes to using the mouse, it can be distracting to see the focus indicator moving as well. In such situations, the component can invoke this method (e.g., in response to mousemove) to temporarily suppress focus visibility.

Defined by FocusVisibleMixin

timeBias property

If set, this indicates whether a date containing only a month and day should infer a year such that the time is in the future or in the past.

Example: the current date is July 1, the locale is "en-US", and the supplied value is "9/1" (September 1 in the U.S.), then if timeBias is not set, the inferred year is the present year. If timeBias is set to "past", the date is taken to be a past date, so the inferred year will be the previous year.

Type: 'future'|'past'|null

Default: null

todayButtonPartType property

The class, tag, or template used to create the today-button part – the button that takes the user back to the current date.

Type: (component class constructor)|HTMLTemplateElement|string

Default: SeamlessButton

toggle(opened) method

Toggle the open/close state of the element.

Parameters:

  • opened: booleantrue if the element should be opened, false if closed.

Defined by OpenCloseMixin

toggleButtonPartType property

The class, tag, or template used to create the toggle-button part – the button that toggles the popup.

Type: (component class constructor)|HTMLTemplateElement|string

Default: SeamlessButton

Defined by ComboBox

type property

The "type" of the form field, provided for consistency with the native HTML type property. The value of this property will be the same as the HTML tag name registered for the custom element.

Type: string

Defined by FormElementMixin

whenClosed() method

This method can be used as an alternative to listening to the "opened-changed" event, particularly in situations where you want to only handle the next time the component is closed.

Returns: Promise A promise that resolves when the element has completely closed, including the completion of any asynchronous opening effect.

Defined by OpenCloseMixin

yearFormat property

The format used to render the year.

The allowable formats are the same as the year formats in Intl.DateTimeFormat.

Type: 'numeric'|'2-digit'

Default: 'numeric'