`<qr-code>`

A no-framework, no-dependencies, customizable, animate-able, SVG-based <qr-code> HTML element. It's just a single, self-contained Web Component.

https://user-images.githubusercontent.com/904007/221692053-1f4ab516-0f63-40e4-b1da-1922ba906963.mp4

Announcement post – usage guidance and background information
Interactive demo – try the above demo in your browser

Usage

Import <qr-code> using your build system or framework (e.g. npm install @bitjson/qr-code), or use the standalone script in your HTML <head> element:

html
<script src="https://unpkg.com/@bitjson/qr-code@1.0.2/dist/qr-code.js"></script>

Then use the component anywhere in your HTML <body> element:

html
<qr-code contents="https://bitjson.com"></qr-code>

Full Example

Here's an example in pure HTML using most features:

html
<qr-code
  id="qr1"
  contents="https://bitjson.com/"
  module-color="#1c7d43"
  position-ring-color="#13532d"
  position-center-color="#70c559"
  mask-x-to-y-ratio="1.2"
  style="
    width: 200px;
    height: 200px;
    margin: 2em auto;
    background-color: #fff;
  "
>
  <img src="assets/1.2-x-to-y-ratio-icon.svg" slot="icon" />
</qr-code>

<script>
  document.getElementById('qr1').addEventListener('codeRendered', () => {
    document.getElementById('qr1').animateQRCode('MaterializeIn');
  });
</script>

Animations

Animate in, animate on user interactions like URL hits or detected payments, and/or animate out when the QR code interaction is complete.

Several preset animations are available, simply run them with the element's animateQRCode method:

js
document.getElementById('qr1').animateQRCode('RadialRipple');

Available built-in presets:

FadeInTopDown
FadeInCenterOut
MaterializeIn
RadialRipple
RadialRippleIn

You can also design your own custom animations! Just pass a function to the qr-code's animateQRCode method, e.g.:

js
document
  .getElementById('qr1')
  .animateQRCode((targets, _x, _y, _count, entity) => ({
    targets,
    from: entity === 'module' ? Math.random() * 200 : 200,
    duration: 500,
    easing: 'cubic-bezier(.5,0,1,1)',
    web: { opacity: [1, 0], scale: [1, 1.1, 0.5] },
  }));

The built-in presets use this API internally, so review those for guidance and inspiration. Pull request for new presets are welcome!

Animation Previewer

The animation previewer makes fine-tuning animations much easier: try it by cloning this repo and running the live-reloading package script:

git clone https://github.com/bitjson/qr-code.git
cd qr-code
npm ci
npm start

Then work on your animation in src/index.html using the animation previewer (at the bottom right of the window) to test the last-run animation at various speeds, scrub through it manually, or play it in reverse.