playback-controller

A webcomponent that displays playback controls (or media controls) for web animations.

Demo: https://cnoelle.github.io/playback-controls/ Demo with suspension: https://cnoelle.github.io/playback-controls/index2.html

Contents

• Basic usage
• Configuration
  • Attributes and properties
  • CSS variables
• Implementation
• Development
  • Prerequisites
  • Build
  • Dev server

Basic usage

Install: npm install playback-controls

Html:

<playback-controls></playback-controls>

Javascript:

import { PlaybackControls } from "playback-controls";

PlaybackControls.register();
const ctrl = document.querySelector("playback-controls");
ctrl.setAnimationListener({move: (state) => {
    // TODO: show animation state at specified completion fraction
    console.log("Fraction completed:", state.fraction);
}});

A complete example can be found in https://github.com/cnoelle/playback-controls/blob/main/index.html.

Configuration

Configuration is achieved partly via attributes and properties, and partly via CSS variables.

Attributes and properties

• Animation duration: specify the attribute animation-duration or Javascript property animationDuration, in ms. Default: 10000 (10 seconds). Example: <playback-controls animation-duration="5000"></playback-controls>
• Remove titles: by default, the controls come with a title attribute, implying that a tooltip is displayed when the user hovers the controls. This can be removed by setting the no-titles attribute or by setting the property noTitles to true. Example: <playback-controls no-titles></playback-controls>.

CSS variables

• playback-controls-color-active/playback-controls-color-inactive: adapt the color of the control icons. Default: black/gray. Example:

  playback-controls {
      --playback-controls-color-active: darkblue;
      --playback-controls-color-inactive: lightblue;
  }

• playback-controls-font-size: Control icon font size. Default: 2em.
• playback-controls-progress-width: Progress indicator width. Default: 8em.

Implementation

• Uses Unicode symbols for the control icons: https://en.wikipedia.org/wiki/Media_control_symbols#cite_note-5
• Modern Javacsript: written in Typescript as an ES module
• No external dependencies

Development

Prerequisites

Requires a recent version of NodeJS. Install dev dependencies: run

npm install

in the base folder of the repository.

Build

Run

npm run build

Dev server

The repository contains an index.html file in the base folder that shows a basic usage of the component. It imports the module from the dist folder, therefore it is required to build once before changes in the source code are applied. To run a dev server:

npx http-server

Then open http://localhost:8080 in the browser.