HTML Presentation Library

So you can write your decks in HTML and share them with the world

<script type="module" src="https://unpkg.com/slidem?module"></script>

<slidem-deck font="Open Sans Condensed" loading>
  <slidem-slide center in="slide" background="--primary">
    <h1 uppercase fit line-height="0.8" color="black">Slide'm</h1>
    <p uppercase fit color="black">HTML Presentation Library</p>
    <p uppercase fit color="white">
      So you can write your decks in HTML and share them with the world
    </p>
    <p uppercase center font-size="78px" line-height="1.8" color="black">
      <a href="https://github.com/ruphin/slidem">View on GitHub</a>
    </p>
    <p center font-size="78px" color="white">Right Arrow or Swipe Left to Begin!</p>
  </slidem-slide>

  <slidem-slide center in="slide" out="slide" background="black">
    <div center>
      <img src="/images/what.png" />
    </div>
    <p line-height="1.3" uppercase fit color="--primary">Wait what?</p>
  </slidem-slide>

  <slidem-slide center in="zoom" out="zoom" background="--primary">
    <div center>
      <img src="/images/codeSample.png">
    </div>
  </slidem-slide>
</slidem-deck>

Add the in and, out attributes to a <slidem-slide> to control its transitions. These attributes take one of three values: fade, slide, or zoom.

Add the reveal attribute to slide content to have those elements transition in one by one. Link to specific states with the #slide-${number}/step-${number} URL hash, e.g. to link to the 3rd slide's 4th step, use #slide-3/step-4.

Press p to enter presenter mode. You can add presenter notes to your slides by slotting them into the notes slot. While in presenter mode, press t to toggle the slide timer.

Slidem provides some HTML extensions to make it easy to quickly style your slides. You can of course use CSS to do the same.

Add fit to any content element (e.g. <p>, <h2> or <strong>) to have it grow to fill the slide width. Add uppercase to transform it to uppercase. Use the color attribute to change it's color. Add line-height to change an element's line height.

Use the background attribute on <slidem-slide> to set the background. it's value can be a CSS colour value, a CSS Custom Property name, or a URL to an image.

You can create your own custom slide types by extending from SlidemSlide. An easy way to add slots to your slide's shadow root is to append your custom template to the slide's existing #container element.

import {SlidemSlide} from '../slidem-slide.js';
const template = document.getElementById('speaker-slide-template');
const style = document.getElementById('speaker-slide-style')
                .content.querySelector('style');
const sheet = new CSSStyleSheet();
      sheet.replaceSync(style.textContent);

class SlidemSpeakerSlide extends SlidemSlide {
  static is = 'slidem-speaker-slide';
  constructor() {
    super();
    this.shadowRoot.getElementById('content').append(template.content.cloneNode(true));
    this.shadowRoot.adoptedStyleSheets = [...this.shadowRoot.adoptedStyleSheets, sheet];
  }
}

customElements.define(SlidemSpeakerSlide.id, SlidemSpeakerSlide);

Occasionally, when defining custom slide elements, you may with to override the default behaviour. One example would be when your slides' content is contained within their shadow roots, perhaps by way of Declarative Shadow DOM.

In that case, you can imperatively define your slide's steps using the defineSteps(nodelist) method:

class DeclarativeShadowSlide extends SlidemSlideBase {
  async connectedCallback() {
    super.connectedCallback();
    await polyfillDeclarativeShadowDOM(this);
    this.defineSteps(this.shadowRoot.querySelectorAll('[reveal]'));
  }
}

See index.html for a complete example.