Slide Deck

Slide deck

A hand-rolled HTML slide engine (a customized fork of Google's old html5slides template) served by Vite. Every slide is one <article>. Layouts are automatic: CSS :has() selectors in slides/styles.css look at what's inside each article and choose the layout. You almost never add a layout class — you just put the right elements in the article and it lays itself out.

Where things live (all under slides/)

Run it

cd slides
npm start          # Vite dev server on http://localhost:6969
npm run build      # builds to docs/

Note: vite.config.js sets base (e.g. /AI-and-JavaScript/) for GitHub Pages — that's per-talk, update it when you start a new deck. So is <title> in index.html and name in package.json.

Navigating (from slides.js)

• Advance: → / space / enter / PgDn. Back: ← / backspace / PgUp.
• Click the left/right 150px edge of the screen to go back/forward; swipe on touch.
• URL hash is the 1-based slide number (#3) — deep-linkable and survives reload.
• onslideenter / onslideleave attributes run on an article; slideenter / slideleave DOM events also fire. Use these to trigger demos.
• <iframe>s are lazy: their src is swapped to about:blank while off-screen.

The layout cookbook

Pick the snippet whose elements match what you want. The CSS detects it automatically — no layout class needed unless noted. Rule locations are in styles.css.

Big statement — heading only

A lone heading is centered and scaled up to ~200px. (styles.css ~278–283)

<article>
  <h1>A big statement</h1>
</article>

Heading + body — title with supporting text/list

Heading followed by p/ul/ol/blockquote/pre → centered with a gap. (styles.css ~265–270)

<article>
  <h2>Heading</h2>
  <p>Supporting sentence.</p>
</article>

Full-bleed media — image or video only

An article whose only child is an <img> or <video> fills the whole slide, object-fit: contain, padding removed. (styles.css ~214–223)

<article>
  <img src="./images/your-image.png" alt="" />
</article>

Title + media

A heading (or .title) followed by a single image/video → title row on top, media fills the rest. (styles.css ~231–246)

<article>
  <h2>Pose Detection</h2>
  <video src="/videos/reps.mp4" autoplay muted loop></video>
</article>

Side by side

Two columns. Add even for a strict 1fr/1fr split; if a column has a heading the grid auto-narrows the first column. Text is right-aligned by default. (styles.css ~295–332)

<article>
  <div class="side-by-side even">
    <div>
      <p class="center">CPU — 7008ms</p>
      <img src="./images/caption-cpu.png" alt="" class="wide" />
    </div>
    <div>
      <p class="center">WebGPU — 576ms</p>
      <img src="./images/caption-webgpu.png" alt="" class="wide" />
    </div>
  </div>
</article>

Columns

Flex row, vertically centered, big gap. Good for "X + Y" comparisons. (styles.css ~285–289)

<article>
  <div class="columns">
    <div><h2>Web<br/>Dev<br/>Courses</h2></div>
    <div>+</div>
    <div><img src="..." /></div>
  </div>
</article>

Grid

Auto-fit grid of items; headings span the full row. (styles.css ~188–207)

<article class="grid">
  <h2>Logos</h2>
  <img src="..." /> <img src="..." /> <img src="..." />
</article>

Jumble — categorized lists

Two-column grid of grouped lists; each <strong> renders as a green chip. (styles.css ~375–400)

<article>
  <p>Lots of things, grouped.</p>
  <ul class="jumble">
    <li><strong>Category</strong>
      <ul><li>Item</li><li>Item</li></ul>
    </li>
  </ul>
</article>

Conventions & helper classes

• img.fit — width/height: 100%, object-fit: contain. Use on images that should fill their cell. img.wide — width: 100%, auto height.
• .center — centers text (often on a caption <p> above an image).
• mark — green highlight on inline text. em — emphasis, used inside headings.
• Section marker: <p class="reason">Reason #1</p> then an <h1> — the recurring "Reason #N" divider. .reason is plain <p> styling, just a semantic hook.
• <p class="sub"> — subtitle line. Plain <p> styling, semantic only.
• Builds (progressive reveal) — put class="build" on a container (usually a <ul>). On load slides.js (makeBuildLists) hides each child with to-build; each advance reveals one more (buildNextItem) before moving to the next slide. Non-obvious but very useful for revealing bullet points one at a time.

  <ul class="build">
    <li>First reveal</li>
    <li>Second reveal</li>
  </ul>
  

• style="--display: block" on an <article> overrides the default display: grid (used on the title slide so the title/subtitle stack normally).
• Inline style="font-size: 15rem" / style="height: 900px" is normal here. One-off sizing per slide is the accepted pattern — don't refactor it into classes.

Video pattern

<video src="/videos/x.mp4" autoplay muted loop></video>

autoplay.ts observes every <video> and plays + resets it to currentTime = 0 when it scrolls into view, pausing it when it leaves. Keep all four attributes and put the file in videos/ (referenced from the site root with a leading /).

Theme notes

• Engine rules, fonts, theme tokens, typography, media helpers, auto-layouts, and slide components all live in styles.css.
• The deck uses local NDK fonts from slides/fonts/ndk/.
• The current theme is dark editorial paper: --paper/--paper-2 are dark, and --ink/--ink-soft are light foreground colors.
• The texture overlay is retired for this theme; .overlay is intentionally hidden.

Add a new slide (recipe)

1. Copy the scaffold <article> closest to what you want from index.html.
2. Drop in your content and let CSS pick the layout — match the element shape from the cookbook.
3. Only add a class (fit, wide, side-by-side, build, …) or an inline style when the automatic layout isn't doing what you want.
4. For media, use images/ or videos/; videos need autoplay muted loop and a /videos/... src.
5. npm start and arrow through to check it.