Examples

The dialog

A part several examples share, shown once, running elsewhere.

The photo viewer needs one <dialog> on its page. It isn’t part of what that example demonstrates, so it lives in assets/examples/dialog/ and runs bare there, with frame="false". This page only shows its files, with run="false":

example.html

<dialog class="box" aria-label="Photo viewer">
  <div data-dlb-viewport></div>
  <div class="box-bar">
    <span class="box-count"><span data-dlb-counter></span> / <span data-dlb-total></span></span>
    <button type="button" data-dlb-zoom>Zoom</button>
    <button type="button" data-dlb-close>Close</button>
  </div>
  <button class="box-side" type="button" data-dlb-prev aria-label="Previous">←</button>
  <button class="box-side" type="button" data-dlb-next aria-label="Next">→</button>
  <p class="box-caption"></p>
  <template data-dlb-overlay="video">
    <div class="box-video">
      <button type="button" data-dlb-play aria-label="Play"></button>
      <button type="button" data-dlb-mute aria-label="Sound off"></button>
      <button type="button" data-dlb-fullscreen>Fullscreen</button>
    </div>
    <span data-dlb-progress></span>
  </template>
</dialog>

style.css

/* Transparent, so the photo sits on the backdrop, which fades in with --dlb-opacity */
.box {
  background: transparent;
  color: #fff;
  font:
    0.8rem / 1 ui-monospace,
    Menlo,
    Consolas,
    monospace;
}

.box::backdrop {
  background: rgb(10 10 12 / calc(var(--dlb-opacity) * 0.94));
}

/* Room above for the bar and below for the caption */
.box [data-dlb-viewport] {
  padding: 3rem 0;
}

.box button {
  padding: 0.45rem 0.7rem;
  border: 1px solid rgb(255 255 255 / 0.3);
  border-radius: 0.25rem;
  background: rgb(10 10 12 / 0.4);
  color: inherit;
  font: inherit;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.box button:hover {
  border-color: #fff;
}

.box button:disabled {
  opacity: 0.3;
  cursor: default;
}

.box-bar {
  position: absolute;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
}

/* "3 / 16" pushes the buttons to the right */
.box-count {
  margin-right: auto;
}

.box-side {
  position: absolute;
  top: 50%;
  translate: 0 -50%;
}

.box [data-dlb-prev] {
  left: 1rem;
}

.box [data-dlb-next] {
  right: 1rem;
}

.box-caption {
  position: absolute;
  inset: auto 1rem 0.9rem;
  margin: 0;
  text-align: center;
  line-height: 1.4;
}

/* The video overlay: copied over each video, so it moves with it */
.box [data-dlb-overlay] {
  pointer-events: none;
}

.box-video {
  position: absolute;
  inset: 0.5rem 0.5rem auto;
  display: flex;
  gap: 0.4rem;
}

.box-video button {
  pointer-events: auto;
}

.box [data-dlb-play]::after {
  content: "Pause";
}

.box[data-dlb-paused] [data-dlb-play]::after,
.box [data-dlb-slide]:not([data-dlb-current]) [data-dlb-play]::after {
  content: "Play";
}

.box [data-dlb-mute]::after {
  content: "Sound off";
}

.box[data-dlb-muted] [data-dlb-mute]::after {
  content: "Sound on";
}

.box [data-dlb-fullscreen] {
  margin-left: auto;
}

.box [data-dlb-progress] {
  position: absolute;
  inset: auto 0 0;
  height: 3px;
  background:
    linear-gradient(#fff, #fff) left / calc(var(--dlb-progress, 0) * 100%) 100% no-repeat,
    rgb(255 255 255 / 0.25);
}

/* Zoom only on photos; a tap on a photo hides the controls */
.box[data-dlb-type="video"] [data-dlb-zoom] {
  display: none;
}

.box[data-dlb-ui-hidden] :is(.box-bar, .box-side, .box-caption) {
  opacity: 0;
  pointer-events: none;
}

/* On touch screens people swipe */
@media (pointer: coarse) {
  .box-side {
    display: none;
  }
}