React_Client_App_Access/node_modules/react-pdf/README.md

[![npm](https://img.shields.io/npm/v/react-pdf.svg)](https://www.npmjs.com/package/react-pdf) ![downloads](https://img.shields.io/npm/dt/react-pdf.svg) ![build](https://travis-ci.com/wojtekmaj/react-pdf.svg?branch=master) ![dependencies](https://img.shields.io/david/wojtekmaj/react-pdf.svg) ![dev dependencies](https://img.shields.io/david/dev/wojtekmaj/react-pdf.svg) [![tested with jest](https://img.shields.io/badge/tested_with-jest-99424f.svg)](https://github.com/facebook/jest)

# React-PDF

Display PDFs in your React app as easily as if they were images.

## tl;dr
* Install by executing `npm install react-pdf` or `yarn add react-pdf`.
* Import by adding `import { Document } from 'react-pdf'`.
* Use by adding `<Document file="..." />`. `file` can be a URL, base64 content, Uint8Array, and more.
* Put `<Page />` components inside `<Document />` to render pages.

## Demo

A minimal demo page can be found in `sample` directory.

[Online demo](http://projects.wojtekmaj.pl/react-pdf/) is also available!

## Before you continue

React-PDF is under constant development. This documentation is written for React-PDF 4.x branch. If you want to see documentation for other versions of React-PDF, use dropdown on top of GitHub page to switch to an appropriate tag. Here are quick links to the newest docs from each branch:

* [v3.x](https://github.com/wojtekmaj/react-pdf/blob/v3.x/README.md)
* [v2.x](https://github.com/wojtekmaj/react-pdf/blob/v2.x/README.md)
* [v1.x](https://github.com/wojtekmaj/react-pdf/blob/v1.8.3/README.md)

## Getting started

### Compatibility

To use the latest version of React-PDF, your project needs to use React 16.3 or later.

If you use an older version of React, please refer to the table below to a find suitable React-PDF version. Don't worry - as long as you're running React 15.5 or later, you won't be missing out a lot!

| React version | Newest compatible React-PDF version |
|-------|--------|
| ≥16.3 | 4.x    |
| ≥15.5 | 3.x    |
| ≥0.13 | 0.0.10 |
| ≥0.11 | 0.0.4  |

### Installation

Add React-PDF to your project by executing `npm install react-pdf` or `yarn add react-pdf`.

### Usage

Here's an example of basic usage:

```js
import React, { useState } from 'react';
import { Document, Page } from 'react-pdf';

function MyApp() {
  const [numPages, setNumPages] = useState(null);
  const [pageNumber, setPageNumber] = useState(1);

  function onDocumentLoadSuccess({ numPages }) {
    setNumPages(numPages);
  }

  return (
    <div>
      <Document
        file="somefile.pdf"
        onLoadSuccess={onDocumentLoadSuccess}
      >
        <Page pageNumber={pageNumber} />
      </Document>
      <p>Page {pageNumber} of {numPages}</p>
    </div>
  );
}
```

Check the [sample directory](https://github.com/wojtekmaj/react-pdf/tree/master/sample) in this repository for a full working example. For more examples and more advanced use cases, check [Recipes](https://github.com/wojtekmaj/react-pdf/wiki/Recipes) in React-PDF Wiki.

### Enable PDF.js worker

It is crucial for performance to use PDF.js worker whenever possible. This ensures that PDF files will be rendered in a separate thread without affecting page performance. To make things a little easier, we've prepared several entry points you can use.

#### Webpack

Instead of directly importing/requiring `'react-pdf'`, import it like so:

```js
import { Document } from 'react-pdf/dist/entry.webpack';
```

#### Parcel

Instead of directly importing/requiring `'react-pdf'`, import it like so:

```js
import { Document } from 'react-pdf/dist/entry.parcel';
```

#### Create React App

Create React App uses Webpack under the hood, but instructions for Webpack will not work. [Standard instructions](#standard-browserify-and-others) apply.

#### Standard (Browserify and others)

If you use Browserify or other bundling tools, you will have to make sure on your own that `pdf.worker.js` file from `pdfjs-dist/build` is copied to your project's output folder.

Alternatively, you could use `pdf.worker.js` from an external CDN:

```js
import { pdfjs } from 'react-pdf';
pdfjs.GlobalWorkerOptions.workerSrc = `//cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjs.version}/pdf.worker.js`;
```

### Support for annotations

If you want to use annotations (e.g. links) in PDFs rendered by React-PDF, then you would need to include stylesheet necessary for annotations to be correctly displayed like so:

```js
import 'react-pdf/dist/Page/AnnotationLayer.css';
```

### Support for non-latin characters

If you want to ensure that PDFs with non-latin characters will render perfectly, or you have encountered the following warning:

```
Warning: The CMap "baseUrl" parameter must be specified, ensure that the "cMapUrl" and "cMapPacked" API parameters are provided.
```

then you would also need to include cMaps in your build and tell React-PDF where they are.

#### Copying cMaps

First, you need to copy cMaps from `pdfjs-dist` (React-PDF's dependency - it should be in your `node_modules` if you have React-PDF installed). cMaps are located in `pdfjs-dist/cmaps`.

##### Webpack

Add `copy-webpack-plugin` to your project if you haven't already:

```
npm install copy-webpack-plugin --save-dev
```

Now, in your Webpack config, import the plugin:

```js
import CopyWebpackPlugin from 'copy-webpack-plugin';
```

and in `plugins` section of your config, add the following:

```js
new CopyWebpackPlugin([
  {
    from: 'node_modules/pdfjs-dist/cmaps/',
    to: 'cmaps/'
  },
]),
```

##### Parcel, Browserify and others

If you use Parcel, Browserify or other bundling tools, you will have to make sure on your own that cMaps are copied to your project's output folder.

#### Setting up React-PDF

Now that you have cMaps in your build, pass required options to Document component by using `options` prop, like so:

```js
<Document
  options={{
    cMapUrl: 'cmaps/',
    cMapPacked: true,
  }}
/>
```

Alternatively, you could use cMaps from external CDN:

```js
import { pdfjs } from 'react-pdf';

<Document
  options={{
    cMapUrl: `//cdn.jsdelivr.net/npm/pdfjs-dist@${pdfjs.version}/cmaps/`,
    cMapPacked: true,
  }}
/>
```

## User guide

### Document

Loads a document passed using `file` prop.

#### Props

|Prop name|Description|Default value|Example values|
|----|----|----|----|
|className|Class name(s) that will be added to rendered element along with the default `react-pdf__Document`.|n/a|<ul><li>String:<br />`"custom-class-name-1 custom-class-name-2"`</li><li>Array of strings:<br />`["custom-class-name-1", "custom-class-name-2"]`</li></ul>|
|error|What the component should display in case of an error.|`"Failed to load PDF file."`|<ul><li>String:<br />`"An error occurred!"`</li><li>React element:<br />`<div>An error occurred!</div>`</li><li>Function:<br />`this.renderError`</li></ul>|
|externalLinkTarget|Link target for external links rendered in annotations.|unset, which means that default behavior will be used|One of valid [values for `target` attribute](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a#Attributes).<ul><li>`"_self"`</li><li>`"_blank"`</li><li>`"_parent"`</li><li>`"_top"`</li></ul>
|file|What PDF should be displayed.<br />Its value can be an URL, a file (imported using `import ... from ...` or from file input form element), or an object with parameters (`url` - URL; `data` - data, preferably Uint8Array; `range` - PDFDataRangeTransport; `httpHeaders` - custom request headers, e.g. for authorization), `withCredentials` - a boolean to indicate whether or not to include cookies in the request (defaults to `false`).<br />**Warning**: Since equality check (`===`) is used to determine if `file` object has changed, it must be memoized by setting it in component's state, `useMemo` or other similar technique.|n/a|<ul><li>URL:<br />`"http://example.com/sample.pdf"`</li><li>File:<br />`import sample from '../static/sample.pdf'` and then<br />`sample`</li><li>Parameter object:<br />`{ url: 'http://example.com/sample.pdf', httpHeaders: { 'X-CustomHeader': '40359820958024350238508234' }, withCredentials: true }`</ul>|
|inputRef|A function that behaves like ref, but it's passed to main `<div>` rendered by `<Document>` component.|n/a|`(ref) => { this.myDocument = ref; }`|
|loading|What the component should display while loading.|`"Loading PDF…"`|<ul><li>String:<br />`"Please wait!"`</li><li>React element:<br />`<div>Please wait!</div>`</li><li>Function:<br />`this.renderLoader`</li></ul>|
|noData|What the component should display in case of no data.|`"No PDF file specified."`|<ul><li>String:<br />`"Please select a file."`</li><li>React element:<br />`<div>Please select a file.</div>`</li><li>Function:<br />`this.renderNoData`</li></ul>|
|onItemClick|Function called when an outline item has been clicked. Usually, you would like to use this callback to move the user wherever they requested to.|n/a|`({ pageNumber }) => alert('Clicked an item from page ' + pageNumber + '!')`|
|onLoadError|Function called in case of an error while loading a document.|n/a|`(error) => alert('Error while loading document! ' + error.message)`|
|onLoadSuccess|Function called when the document is successfully loaded.|n/a|`(pdf) => alert('Loaded a file with ' + pdf.numPages + ' pages!')`|
|onPassword|Function called when a password-protected PDF is loaded.|A function that prompts the user for password|`(callback) => callback('s3cr3t_p4ssw0rd')`|
|onSourceError|Function called in case of an error while retrieving document source from `file` prop.|n/a|`(error) => alert('Error while retrieving document source! ' + error.message)`|
|onSourceSuccess|Function called when document source is successfully retrieved from `file` prop.|n/a|`() => alert('Document source retrieved!')`|
|options|An object in which additional parameters to be passed to PDF.js can be defined. For a full list of possible parameters, check [PDF.js documentation on DocumentInitParameters](https://mozilla.github.io/pdf.js/api/draft/module-pdfjsLib.html#~DocumentInitParameters).|n/a|`{ cMapUrl: 'cmaps/', cMapPacked: true }`|
|renderMode|Rendering mode of the document. Can be `"canvas"`, `"svg"` or `"none"`.|`"canvas"`|`"svg"`|
|rotate|Rotation of the document in degrees. If provided, will change rotation globally, even for the pages which were given `rotate` prop of their own. `90` = rotated to the right, `180` = upside down, `270` = rotated to the left.|n/a|`90`|

### Page

Displays a page. Should be placed inside `<Document />`. Alternatively, it can have `pdf` prop passed, which can be obtained from `<Document />`'s `onLoadSuccess` callback function, however some advanced functions like linking between pages inside a document may not be working correctly.

#### Props

|Prop name|Description|Default value|Example values|
|----|----|----|----|
|className|Class name(s) that will be added to rendered element along with the default `react-pdf__Page`.|n/a|<ul><li>String:<br />`"custom-class-name-1 custom-class-name-2"`</li><li>Array of strings:<br />`["custom-class-name-1", "custom-class-name-2"]`</li></ul>|
|customTextRenderer|A function that customizes how a text layer is rendered. Passes itext item and index for item.|n/a|`({ str, itemIndex }) => { return (<mark>{str}</mark>) }`|
|error|What the component should display in case of an error.|`"Failed to load the page."`|<ul><li>String:<br />`"An error occurred!"`</li><li>React element:<br />`<div>An error occurred!</div>`</li><li>Function:<br />`this.renderError`</li></ul>|
|height|Page height. If neither `height` nor `width` are defined, page will be rendered at the size defined in PDF. If you define `width` and `height` at the same time, `height` will be ignored. If you define `height` and `scale` at the same time, the height will be multiplied by a given factor.|Page's default height|`300`|
|inputRef|A function that behaves like ref, but it's passed to main `<div>` rendered by `<Page>` component.|n/a|`(ref) => { this.myPage = ref; }`|
|loading|What the component should display while loading.|`"Loading page…"`|<ul><li>String:<br />`"Please wait!"`</li><li>React element:<br />`<div>Please wait!</div>`</li><li>Function:<br />`this.renderLoader`</li></ul>|
|noData|What the component should display in case of no data.|`"No page specified."`|<ul><li>String:<br />`"Please select a page."`</li><li>React element:<br />`<div>Please select a page.</div>`</li><li>Function:<br />`this.renderNoData`</li></ul>|
|onLoadError|Function called in case of an error while loading the page.|n/a|`(error) => alert('Error while loading page! ' + error.message)`|
|onLoadProgress|Function called, potentially multiple times, as the loading progresses.|n/a|`({ loaded, total }) => alert('Loading a document: ' + (loaded / total) * 100 + '%');`|
|onLoadSuccess|Function called when the page is successfully loaded.|n/a|`(page) => alert('Now displaying a page number ' + page.pageNumber + '!')`|
|onRenderError|Function called in case of an error while rendering the page.|n/a|`(error) => alert('Error while loading page! ' + error.message)`|
|onRenderSuccess|Function called when the page is successfully rendered on the screen.|n/a|`() => alert('Rendered the page!')`|
|onGetAnnotationsSuccess|Function called when annotations are successfully loaded.|n/a|`(annotations) => alert('Now displaying ' + annotations.length + ' annotations!')`|
|onGetAnnotationsError|Function called in case of an error while loading annotations.|n/a|`(error) => alert('Error while loading annotations! ' + error.message)`|
|onGetTextSuccess|Function called when text layer items are successfully loaded.|n/a|`(items) => alert('Now displaying ' + items.length + ' text layer items!')`|
|onGetTextError|Function called in case of an error while loading text layer items.|n/a|`(error) => alert('Error while loading text layer items! ' + error.message)`|
|pageIndex|Which page from PDF file should be displayed, by page index.|`0`|`1`|
|pageNumber|Which page from PDF file should be displayed, by page number. If provided, `pageIndex` prop will be ignored.|`1`|`2`|
|renderAnnotationLayer|Whether annotations (e.g. links) should be rendered.|`true`|`false`|
|renderInteractiveForms|Whether interactive forms should be rendered. `renderAnnotationLayer` prop must be set to `true`.|`false`|`true`|
|renderMode|Rendering mode of the document. Can be `"canvas"`, `"svg"` or `"none"`.|`"canvas"`|`"svg"`|
|renderTextLayer|Whether a text layer should be rendered.|`true`|`false`|
|rotate|Rotation of the page in degrees. `90` = rotated to the right, `180` = upside down, `270` = rotated to the left.|Page's default setting, usually `0`|`90`|
|scale|Page scale.|`1.0`|`0.5`|
|width|Page width. If neither `height` nor `width` are defined, page will be rendered at the size defined in PDF. If you define `width` and `height` at the same time, `height` will be ignored. If you define `width` and `scale` at the same time, the width will be multiplied by a given factor.|Page's default width|`300`|

### Outline

Displays an outline (table of contents). Should be placed inside `<Document />`. Alternatively, it can have `pdf` prop passed, which can be obtained from `<Document />`'s `onLoadSuccess` callback function.

#### Props

|Prop name|Description|Default value|Example values|
|----|----|----|----|
|className|Class name(s) that will be added to rendered element along with the default `react-pdf__Outline`.|n/a|<ul><li>String:<br />`"custom-class-name-1 custom-class-name-2"`</li><li>Array of strings:<br />`["custom-class-name-1", "custom-class-name-2"]`</li></ul>|
|onItemClick|Function called when an outline item has been clicked. Usually, you would like to use this callback to move the user wherever they requested to.|n/a|`({ pageNumber }) => alert('Clicked an item from page ' + pageNumber + '!')`|
|onLoadError|Function called in case of an error while retrieving the outline.|n/a|`(error) => alert('Error while retrieving the outline! ' + error.message)`|
|onLoadSuccess|Function called when the outline is successfully retrieved.|n/a|`(outline) => alert('The outline has been successfully retrieved.')`|

## License

The MIT License.

## Author

<table>
  <tr>
    <td>
      <img src="https://github.com/wojtekmaj.png?s=100" width="100">
    </td>
    <td>
      Wojciech Maj<br />
      <a href="mailto:kontakt@wojtekmaj.pl">kontakt@wojtekmaj.pl</a><br />
      <a href="http://wojtekmaj.pl">http://wojtekmaj.pl</a>
    </td>
  </tr>
</table>

## Thank you

This project wouldn't be possible without awesome work of Niklas Närhinen <niklas@narhinen.net> who created its initial version and without Mozilla, author of [pdf.js](http://mozilla.github.io/pdf.js). Thank you!

### Sponsors

Thank you to all our sponsors! [Become a sponsor](https://opencollective.com/react-pdf-wojtekmaj#sponsor) and get your image on our README on GitHub.

<a href="https://opencollective.com/react-pdf-wojtekmaj#sponsors" target="_blank"><img src="https://opencollective.com/react-pdf-wojtekmaj/sponsors.svg?width=890"></a>

### Backers

Thank you to all our backers! [Become a backer](https://opencollective.com/react-pdf-wojtekmaj#backer) and get your image on our README on GitHub.

<a href="https://opencollective.com/react-pdf-wojtekmaj#backers" target="_blank"><img src="https://opencollective.com/react-pdf-wojtekmaj/backers.svg?width=890"></a>

### Top Contributors

Thank you to all our contributors that helped on this project!

![Top Contributors](https://opencollective.com/react-pdf/contributors.svg?width=890&button=false)