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Presenter View (experimental, Presentation API)

An experimental, opt-in alternative to the classic presenter plugin, built on the W3C Presentation API instead of window.open(). The presenter (controller) asks the browser to render the deck on a secondary attached display or Cast device, and the two views stay in sync by exchanging messages over a PresentationConnection.

It shares all of its presenter UI (speaker notes, next-slide preview, future delayed items, timing help) with the classic plugin, and is intended to eventually replace it.

Why use it

  • Picks the secondary display through the browser's own picker — no dragging a popup across screens, no popup blockers.
  • Can target Cast / AirPlay-style remote displays, not just attached monitors.
  • Auto-reconnects when the presenter view is reloaded, with no picker and no extra keypress, by reattaching to the still-open audience view.

Enabling

Add the experimental-presentation-api class to <body>:

<body class="experimental-presentation-api">

This disables the classic presenter plugin for that deck, so the two never run together. Without the class, the classic window.open presenter loads as before — that's the fallback wherever the Presentation API isn't available.

Autoload

Like the classic plugin, this autoloads when speaker notes (<details class="notes">) are found in any slide and the experimental-presentation-api class is present on <body>.

Usage

Enter presenter mode by pressing Ctrl + P, then pick the display to present on. This window becomes the Presenter view; the audience view is rendered on the chosen display. Slide and item navigation (including .delayed items) is synced across the two views.

If you reload the presenter view, it reconnects to the audience view automatically. To exit, close/stop the presentation from the browser.

Requirements & limitations

  • Needs a browser that supports the Presentation API (Chromium-based) and a secure context (HTTPS or localhost). On unsupported browsers, remove the experimental-presentation-api class to fall back to the classic presenter.
  • Only slide/item navigation is synced, not keyboard or mouse events — interact with the presenter view to drive navigation; play videos / open links / run live demos on the audience display directly.