@granatum/react-pdf
v5.5.1-7-legacy
Published
Simple React component to wrap up PDF.js. The easiest way to render PDFs in your React app.
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Readme
react-pdf-js
react-pdf-js
provides a component for rendering PDF documents using PDF.js.
Demo
https://pdf.netlify.com
Usage
Install with yarn add @mikecousins/react-pdf
or npm install @mikecousins/react-pdf
usePdf
hook
Use the hook in your app (showing some basic pagination as well):
import React, { useState, useRef } from 'react';
import { usePdf } from '@mikecousins/react-pdf';
const MyPdfViewer = () => {
const [page, setPage] = useState(1);
const canvasRef = useRef(null);
const { pdfDocument, pdfPage } = usePdf({
file: 'test.pdf',
page,
canvasRef,
});
return (
<div>
{!pdfDocument && <span>Loading...</span>}
<canvas ref={canvasRef} />
{Boolean(pdfDocument && pdfDocument.numPages) && (
<nav>
<ul className="pager">
<li className="previous">
<button disabled={page === 1} onClick={() => setPage(page - 1)}>
Previous
</button>
</li>
<li className="next">
<button
disabled={page === pdfDocument.numPages}
onClick={() => setPage(page + 1)}
>
Next
</button>
</li>
</ul>
</nav>
)}
</div>
);
};
Props
When you call usePdf you'll want to pass in a subset of these props, like this:
const { pdfDocument, pdfPage } = usePdf({ canvasRef, file: 'https://example.com/test.pdf', page });
canvasRef
A reference to the canvas element. Create with:
const canvasRef = useRef(null);
and then render it like:
<canvas ref={canvasRef} />
and then pass it into usePdf.
file
URL of the PDF file.
onDocumentLoadSuccess
Allows you to specify a callback that is called when the PDF document data will be fully loaded. Callback is called with PDFDocumentProxy as an only argument.
onDocumentLoadFail
Allows you to specify a callback that is called after an error occurred during PDF document data loading.
onPageLoadSuccess
Allows you to specify a callback that is called when the PDF page data will be fully loaded. Callback is called with PDFPageProxy as an only argument.
onPageLoadFail
Allows you to specify a callback that is called after an error occurred during PDF page data loading.
onPageRenderSuccess
Allows you to specify a callback that is called when the PDF page will be fully rendered into the DOM. Callback is called with PDFPageProxy as an only argument.
onPageRenderFail
Allows you to specify a callback that is called after an error occurred during PDF page rendering.
page
Specify the page that you want to display. Default = 1,
scale
Allows you to scale the PDF. Default = 1.
rotate
Allows you to rotate the PDF. Number is in degrees. Default = 0.
cMapUrl
Allows you to specify a cmap url. Default = '../node_modules/pdfjs-dist/cmaps/'.
cMapPacked
Allows you to specify whether the cmaps are packed or not. Default = false.
workerSrc
Allows you to specify a custom pdf worker url. Default = '//cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjs.version}/pdf.worker.js'.
withCredentials
Allows you to add the withCredentials flag. Default = false.
Returned values
pdfDocument
pdfjs
's PDFDocumentProxy
object.
This can be undefined if document has not been loaded yet.
pdfPage
pdfjs
's PDFPageProxy
object
This can be undefined if page has not been loaded yet.
Pdf
component
You can also use the Pdf
component (which uses usePdf
hook internally):
import React, { useState } from 'react';
import Pdf from '@mikecousins/react-pdf';
const MyPdfViewer = () => {
const [page, setPage] = useState(1);
return <Pdf file="basic.33e35a62.pdf" page={page} />;
};
Or if you want to use pdf's data (e.g. to render pagination):
import React, { useState } from 'react';
import Pdf from '@mikecousins/react-pdf';
const MyPdfViewer = () => {
const [page, setPage] = useState(1);
return (
<Pdf file="basic.33e35a62.pdf" page={page}>
{({ pdfDocument, pdfPage, canvas }) => (
<>
{!pdfDocument && <span>Loading...</span>}
{canvas}
{Boolean(pdfDocument && pdfDocument.numPages) && (
<nav>
<ul className="pager">
<li className="previous">
<button
disabled={page === 1}
onClick={() => setPage(page - 1)}
>
Previous
</button>
</li>
<li className="next">
<button
disabled={page === pdfDocument.numPages}
onClick={() => setPage(page + 1)}
>
Next
</button>
</li>
</ul>
</nav>
)}
</>
)}
</Pdf>
);
};
Notice that in the second example, you are responsible for rendering the canvas element into the DOM.
Props
Pdf
component accepts all the props that usePdf
hook do, with exception of canvasRef
(the component renders it by itself).
Additionaly, the component accepts:
children
A function that receives data returned by usePdf
hook with addition of canvas element. You are responsible for rendering that element into the DOM if you choose to pass children prop.
License
MIT © mikecousins