Lily Design System™

Date Time Now Input

DateTimeNowInput is a headless component that wraps a native <input type="date">, <input type="time">, and a <button type="button"> inside a <div>. The "Now" button sets both inputs to the current local date and time when clicked.

This component is useful for event logging, timestamping, incident reporting, and any scenario where users need to quickly capture the current date and time or manually enter a specific date and time.

Example

Show demo markup 
<div class="date-time-now-input" role="group" aria-label="Appointment date and time"><label for="demo-dtn-date">Date</label><input id="demo-dtn-date" type="date" /><label for="demo-dtn-time">Time</label><input id="demo-dtn-time" type="time" /><button type="button">Now</button></div>
Usage example 
<script lang="ts">
    import DateTimeNowInput from "./DateTimeNowInput.svelte";
    let dateValue = $state("");
    let timeValue = $state("");
</script>

<DateTimeNowInput label="Event time" bind:dateValue bind:timeValue />
Show Svelte source 
// In your Svelte component:
import DateTimeNowInput from "lily-design-system-svelte-headless/components/DateTimeNowInput/DateTimeNowInput.svelte";

<DateTimeNowInput label="Label" />

Usage

Clinical observation timestamp with "Now" button:

<DateTimeNowInput label="Observation recorded" dateValue={obsDate} timeValue={obsTime} nowLabel="Record now" required />

Incident reporting with default labels:

<DateTimeNowInput label="Incident occurred" dateValue={incidentDate} timeValue={incidentTime} />

Locked timestamp that has already been recorded:

<DateTimeNowInput label="Administered at" dateValue={adminDate} timeValue={adminTime} disabled={true} />

Props

  • label: string (required) -- accessible name for the wrapper group via aria-label
  • dateLabel: string (default: "Date") -- accessible name for the date input via aria-label
  • timeLabel: string (default: "Time") -- accessible name for the time input via aria-label
  • nowLabel: string (default: "Now") -- accessible label and text for the "Now" button
  • dateValue: string (default: "") -- bindable date string (format: YYYY-MM-DD)
  • timeValue: string (default: "") -- bindable time string (format: HH:mm)
  • required: boolean (default: false) -- whether the inputs are required for form submission
  • disabled: boolean (default: false) -- whether the inputs and button are disabled
  • ...restProps: unknown -- additional attributes spread onto the wrapper <div>

Keyboard Interactions

  • Tab: Moves focus between the date input, time input, and "Now" button
  • Enter/Space on the "Now" button: Sets both inputs to the current date and time
  • Arrow keys: Navigate within the date and time picker fields (native browser behavior)

ARIA

  • aria-label={label} -- provides an accessible name for the wrapper group
  • aria-label={dateLabel} -- provides an accessible name for the date input
  • aria-label={timeLabel} -- provides an accessible name for the time input
  • aria-label={nowLabel} -- provides an accessible name for the "Now" button

When to Use

  • Use when users need to enter a date and time with a "Now" button that auto-fills the current date and time.
  • Use in clinical recording where timestamps matter, such as observation times or medication administration.
  • Use for event logging, incident reporting, timestamping, or time tracking interfaces.
  • Use when the user frequently needs to record the current moment quickly.
  • Use for audit trails and activity logs that require precise date-time capture.

When Not to Use

  • Do not use when only a date is needed -- use DateInput instead.
  • Do not use when only a time is needed -- use TimeInput instead.
  • Do not use when a single combined field is preferred and no "Now" button is needed -- use DateTimeLocalInput instead.

Headless

This headless component provides a <div> wrapping a native <input type="date">, <input type="time">, and <button type="button"> with accessible labeling via aria-label on each element, two-way value binding for date and time, and a "Now" button that sets both to the current local date and time. The consumer provides all visual styling, layout, and any custom validation feedback.

Styles

The consumer provides all CSS styling. The component renders with a .date-time-now-input class for targeting. No default styles are included -- this is a fully headless component.

Testing

  • Verify the component renders a wrapper <div> with class date-time-now-input
  • Verify it contains an <input type="date"> with aria-label
  • Verify it contains an <input type="time"> with aria-label
  • Verify it contains a <button type="button"> with aria-label
  • Verify clicking the "Now" button sets date and time to current values
  • Verify disabled and required attributes propagate correctly
  • Verify pass-through attributes are applied to the wrapper <div>

Advice

  • Designers: Place the "Now" button adjacent to the inputs so users can easily discover it. Consider adding a clock icon to the button for visual clarity.
  • Developers: The "Now" button uses new Date() to get the current local date and time. The date format is YYYY-MM-DD and time format is HH:mm to match native input requirements.

Implementation Notes

  • Renders a wrapper <div> containing a date input, a time input, and a "Now" button
  • The date input is <input type="date"> for selecting a date
  • The time input is <input type="time"> for selecting a time
  • The "Now" button sets both date and time inputs to the current local date and time
  • Uses aria-label for accessible naming on each input and the button
  • Supports two-way binding on the dateValue and timeValue props
  • Spreads restProps onto the wrapper <div> for consumer extensibility

Related components

  • text-input — a single-line text input field <input type="text">

References

  • MDN date input: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date
  • MDN time input: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/time

Canonical contract

Generated from this component's canonical metadata — the machine-checked source the implementations are held to.

Metadata

  • Component: date-time-now-input
  • PascalCase: DateTimeNowInput
  • Description: an input for entering a date and time and "now" button <input type="date"><input type="time"><button type="button">
  • Status: beta — implemented and unit-tested in all seven frameworks with an axe-clean demo page; not yet exercised in composed flows
  • HTML tag: <div>
  • CSS class: .date-time-now-input
  • Interactive: yes

ARIA

  • aria-label={dateLabel} -- provides an accessible name for the date input
  • aria-label={timeLabel} -- provides an accessible name for the time input
  • aria-label={nowLabel} -- provides an accessible name for the "Now" button

Keyboard

  • Tab: Moves focus between the date input, time input, and "Now" button
  • Enter/Space on the "Now" button: Sets both inputs to the current date and time
  • Arrow keys: Navigate within the date and time picker fields (native browser behavior)

Props

  • label: string (required) -- accessible name for the wrapper group via aria-label
  • dateLabel: string (default: "Date") -- accessible name for the date input via aria-label
  • timeLabel: string (default: "Time") -- accessible name for the time input via aria-label
  • nowLabel: string (default: "Now") -- accessible label and text for the "Now" button
  • dateValue: string (default: "") -- bindable date string (format: YYYY-MM-DD)
  • timeValue: string (default: "") -- bindable time string (format: HH:mm)
  • required: boolean (default: false) -- whether the inputs are required for form submission
  • disabled: boolean (default: false) -- whether the inputs and button are disabled
  • ...restProps: unknown -- additional attributes spread onto the wrapper <div>