A Custom Element for <input type="duration">.

References:

• Browser support
  • Stable: https://wpt.fyi/results/custom-elements/HTMLElement-attachInternals.html?label=master&label=stable&aligned&view=subtest
  • Experimental: https://wpt.fyi/results/custom-elements/HTMLElement-attachInternals.html
  • https://webkit.org/blog/13703/release-notes-for-safari-technology-preview-162/
• Web standards
  • whatwg/html#5488
  • https://github.com/tc39/proposal-intl-duration-format

<!-- Include `InputDurationElement` -->
<script src="https://unpkg.com/[email protected]" type="module"></script>

<!-- Render `<input-duration>` -->
<label for="duration">Duration</label>
<input-duration id="duration" name="duration"></input-duration>

• max (number): Max value of duration in seconds.
• name (string): Input name.
• value (number): Default value of duration in seconds.

• ::part(divider): Divider (:).

• hour: Default to :.
• minute: Default to :.
• second: Default to empty.

• inputDuration.value = number sets duration value to number in seconds.
• inputDuration.value gets duration value to number in seconds.

• change fires when duration value changes.

• Support min
• Validation
• Figure out maxLength, max, size.