<pdf-viewer> is a custom HTML element that displays PDFs, much like an <img> tag.

<pdf-viewer> is a drop-in PDF viewer. It works in plain HTML documents, and in frameworks with declararive templating like React, Vue, Angular, Lit, or Svelte.

<pdf-viewer> is built with PDF.js, which renders PDFs with JavaScript. PDF.js is maintained by Mozilla and powers Firefox's built-in PDF viewer.

npm i pdf-viewer-element

<script type="module" src="node_modules/pdf-viewer-element/pdf-viewer.js"></script>

<!-- ... -->

<pdf-viewer-element src="./my-doc.pdf"></pdf-viewer-element>

<script type="module" src="https://unpkg.com/pdf-viewer-element?module"></script>

<!-- ... -->

<pdf-viewer-element src="./my-doc.pdf"></pdf-viewer-element>

• Simple drop-in PDF viewer with no configuration required
• No build steps required
• Works from a CDN
• Optional configuration for power-users:
  • Exposes most useful pdf.js options
  • Customization via DOM: CSS variables, slots, parts, etc.
• Adapt pdf.js to the DOM: ie, pipe events back through elements

Why make this?

• Learn pdf.js
• Create a useful framework-agnostic element for the web ecosystem
• Gain experience with tricky module, worker, and asynchronous timing issues within web component wrappers
• Convince pdf.js to distribute modules and web components directly?

• Controls replaceable via <slot>s
• Tests
• Pipe events from pdf.js event-bus into DOM elements
• Options: rotation, auto-size
• Use ResizeObserver for auto-size
• Use IntersectionObserver for laziness