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About the developer

intbot
173 Stars 81 Forks 210 Commits 49 Opened issues

Description

An angular 8 component for PDFJS and ViewerJS (Supports angular 2/4/5/6/7)

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Contributors list

Angular PDFJS viewer with Mozilla's ViewerJS. Supports Angular 2+

downloads npm version

🎉 Thanks a ton to the community - We are talking Downloads in millions now!!!

This project is currently maintained by a single developer on his spare time. Inviting contributors and pull requests to pick-up momentum, and handle the expansive userbase and feature requests.

This is a super simple angular component for displaying pdfs inline(embedded) OR in a new tab along with a feature rich viewer. It uses mozilla's pdfjs viewer(v2.2.171) behind the scenes and supports angular version above 2.0. Extremely lightweight, easiest to integrate and use, most reliable, this library has only one dependancy (@angular/core).

What is new?

  1. Direct access to underlying viewer - Exposed PDFViewerApplication and PDFViewerApplicationOptions objects opens a whole world of customizable PDFJS and ViewerJS properties and methods, allowing to change them programmatically; thus producing a unique viewer experience.
  2. Dynamic page number - Getter/Setter added for page number. Change page number after document loaded, or access current page in parent component.
  3. Support for events - You may now register several events such as document load, page change, before print, after print etc. Please make sure to provide
    viewerId
    for events to work properly.

Tutorials, Demos & Examples

Hosted Demo app showing unique use cases: https://ng2-pdfjs-viewer.azurewebsites.net
Minimalistic angular sample app: https://github.com/intbot/ng2-pdfjs-viewer/tree/master/SampleApp
Source code for the demo here : https://github.com/intbot/ng2-pdfjs-viewer/tree/master/Demo

Features

Some of below features are unique to this component, which is unavailable in native viewer or other implementations.
✔️ Open pdf in new window 🌐 - Opens pdf viewer in new window. Also, you may set all allowable external window options.
✔️ Direct access to underlying viewer 👨‍💻👩‍💻- Exposed PDFViewerApplication and PDFViewerApplicationOptions objects opens a whole world of customizable PDFJS and ViewerJS properties and methods, allowing to change them programmatically; thus producing a unique viewer experience.
✔️ Embed pdf 🗎 - Embeds viewer and pdf inside your web page/component.
✔️ Blob and byte arrays 🔟 - Have pdf as a byte array? Still works.
✔️ Events ⚡ - Catch events such as document loaded, page change, before/after print etc.Please make sure to provide

viewerId
for events to work properly.
✔️ Print preview 🖨️ - You can set the pdf to open in a new tab or another browser window and provide an immediate print preview, A use case will be a 'Print' button opening pdf in new window with print dialog.
✔️ Defaults - There are a ton of built in functionality Mozilla's viewer supports; such as print, download, bookmark, fullscreen, open file, zoom, search, pan, spread, navigate, attachments etc which is also available as-is in this viewer. Not mentioning them individually.
✔️ Auto download 💾 - This option allows you to download the pdf file to user device automatically without manually invoking the download.
✔️ Auto rotate 🔄 - Rotate the document clockwise or anti-clockwise 90° (+/- 90°) just before displaying. Useful if the document is misaligned.
✔️ Language 🌍 - Set the language of your choice to the viewer controls.
✔️ Custom error ❌ - Hate the defaults pdfjs errors, use this feature to override or append to it.
✔️ Side bar 📎 - Open and show the sidebar with relevant information. E.g. Show attachments.
✔️ Smart device friendly zoom 📱 - A better zooming experience on small devices.
✔️ Progress spinner ⏳ - An optional spinner which displays before document renders.
✔️ Show/Hide controls 👻 - Do not want users to see specific controls (E.g. download button). Use relevant features to remove controls from viewer.
✔️ Navigate ⏩ - Navigate the document using page number, section, or even directly jump to last page if you are expecting a signature from user.
✔️ Zoom 🔍 - Several zoom methods, auto, percentage (E.g. 150%), page-with/height, fit page etc. with ability to set offset.
✔️ Cursor 👆 - Love the age old hand cursor 👆 on your pdf? You got it.
✔️ Change file name - You may set the file name of download to a different one, if user chooses to download.
✔️ Scroll 📜 - Changes the scroll to your choice. Even wrapped scrolling is supported.
✔️ Spread - Allows you to change spread to odd or even.

Open in a new tab/ external window

angular pdfjs viewer in new window

Embed pdf into any angular component/page

angular pdfjs viewer embedded

Installation

Step 1: Install
ng2-pdfjs-viewer

$ npm install ng2-pdfjs-viewer --save

And then configure it in your Angular

AppModule
:
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { PdfJsViewerModule } from 'ng2-pdfjs-viewer'; //

Step 2: Copy task for pdfjs

For several advanced options to work, you need a copy of pdfjs from this npm package. Edit your project's

angular.json
file and use
ng build
as described here https://angular.io/guide/workspace-config#project-asset-configuration
json
"assets": [
  { "glob": "**/*", "input": "node_modules/ng2-pdfjs-viewer/pdfjs", "output": "/assets/pdfjs" },
]

Please note, you may manually Copy `nodemodules\ng2-pdfjs-viewer\pdfjs

to your
public
or
asset
folder or use any copy script as part of your build process. Another method could be to use
TransferWebpackPlugin
if you are using webpack(https://github.com/dkokorev90/transfer-webpack-plugin)._  
TransferWebpackPlugin
Sample code  
typescript
var TransferWebpackPlugin = require('transfer-webpack-plugin');
...
plugins: [
  new TransferWebpackPlugin([
    { from: 'node_modules\ng2-pdfjs-viewer\pdfjs', to: path.join(__dirname, 'assets') }
  ])
]
`

Please note if you decide to put

pdfjs
folder anywhere else other than the
assets
folder, make sure you also set
[viewerFolder]
property to help locate the folder.

Options

| Attribute | Description | Type | Default Value | --- | --- | --- | --- | |

[pdfSrc]
| Fully qualified path to pdf file. (For remote pdf urls over http/https, CORS should be enabled) |
string
| | |
PDFViewerApplication
| This public property exposes underlying PDFViewerApplication object. Make sure to access it after document is loaded. Opens up the whole world of underlying PDFJS properties and methods. Use it to customize the viewer and document experience. |
object
| | |
PDFViewerApplicationOptions
| This public property exposes underlying PDFViewerApplicationOptions object. Make sure to access it after document is loaded. Opens up the whole world of underlying PDFJS options. Use it to customize the viewer and document experience. |
object
| | |
[viewerFolder]
| Set path to pdfjs's
web
and
build
folders. |
string
|
assets
folder path | |
[externalWindow]
| Open in new tab. Set to
true
to open document in a new tab |
boolean
|
false
| |
externalWindowOptions
| External window options. For allowed comma separated values, refer to https://developer.mozilla.org/en-US/docs/Web/API/Window/open |
string
| | |
(onDocumentLoad)
| Event to be invoked once document is fully loaded(Must provide
viewerId
). Also returns number of pages in the
$event
parameter. E.g.
(onDocumentLoad)="testPagesLoaded($event)""
|
Function
| | |
(onPageChange)
| Event to be invoked when user scrolls through pages(Must provide
viewerId
). Also returns current page number user is at in the
$event
parameter. E.g.
(onPageChange)="testPageChange($event)""
|
Function
| | |
(onBeforePrint)
| Event to be invoked before document gets printed(Must provide
viewerId
). E.g.
(onBeforePrint)="testBeforePrint()"
|
Function
| | |
(onAfterPrint)
| Event to be invoked after document gets printed(Must provide
viewerId
). E.g.
(onAfterPrint)="testAfterPrint()"
|
Function
| | |
downloadFileName
| Sets/Changes the name of document to be downloaded. If the file name does not ends in
.pdf
, the component will automatically add it for you. |
string
| Actual name of the document | |
[page]
| Show specific page. E.g page=3. You may also get/set the page number from your component using '.' notation explicitly, after document is loaded. E.g.
myPdfViewer.page = 3;
|
number
|
1
| |
[lastPage]
| Show last page of the document once it is loaded(If set to
true
). If you use this option along with
page
option, undesired effects might occur |
boolean
|
false
| |
nameddest
| Go to a named destination. E.g. To go to section 5.1 use like nameddest=5.1. Do not mix this option with
page
and
lastPage
options |
string
| | |
zoom
| Set zoom level of document. Applicable values are
auto
,
page-width
,
page-height
,
page-fit
,
200
(As a zoom percentage),
left offset
(As in "auto,18,827"),
top offset
(As in "auto,18,127") |
string
|
auto
| |
[print]
| Show/hide print button. Set
false
to hide |
boolean
|
true
| |
[startPrint]
| Start print preview of document. This combined with
externalWindow
could mimic a print preview functionality just like the one in gmail. |
boolean
| | |
[download]
| Show/hide download button. Set
false
to hide | boolean |
true
| |
[find]
| Show/hide search button. Set
false
to hide | boolean |
true
| |
[startDownload]
| Download document as soon as it opens. You may put this to good use. |
boolean
| | |
[rotatecw]
| Rotate document clock wise 90° |
boolean
| | |
[rotateccw]
| Rotate document anti-clock wise 90° |
boolean
| | |
cursor
| Type of cursor. Available options are
HAND
/
H
,
SELECT
/
S
,
ZOOM
/
Z
. Case is irrelevant. |
SELECT
/
S
| | |
scroll
| Sets scroll. Available options are
VERTICAL
/
V
,
HORIZONTAL
/
H
,
WRAPPED
/
W
. Case is irrelevant. |
VERTICAL
/
V
| | |
spread
| Sets Odd or Even spread. Available options are
ODD
/
O
,
EVEN
/
E
,
NONE
/
N
. Case is irrelevant. |
NONE
/
N
| | |
[fullScreen]
| Show/hide presentation(full screen) button. Set
false
to hide |
boolean
|
true
| |
cursor
| Type of cursor. Available options are
HAND
/
H
,
SELECT
/
S
,
ZOOM
/
Z
. Case is irrelevant. |
SELECT
/
S
| | |
pagemode
| State of sidebar. Available options are
none
,
thumbs
,
bookmarks
,
attachments
. E.g.
pagemode=attachments
. |
none
| | |
[openFile]
| Show/hide open file button. Set
false
to hide | boolean |
true
| |
[viewBookmark]
| Show/hide bookmark button. Set
false
to hide | boolean |
true
| |
[showSpinner]
| Show a simple css based spinner/progress before the document loads | boolean |
true
| |
locale
| Set locale(language) of toolbar/buttons and other viewer elements. E.g. 'de-AT', 'en-GB' etc | string | browser's default language if present, otherwise
en-US
| |
[useOnlyCssZoom]
| Instructs the viewer to use css based zoom. This will produce better zoom effect on mobile devices and tablets. | boolean |
false
| |
errorMessage
| Custom error message | string | | |
[errorAppend]
| Appends custom error message to the end of other pdfjs error messages |
true
| |
[errorOverride]
| Overrides all pdfjs error messages and shows only user's custom error message | boolean |
false
| |
[diagnosticLogs]
| Turns on all diagnostic logs to the console | boolean |
true
|

Please note, copy step is mandatory to enjoy all of the different options listed above. You may also avoid this step and could directly use https://github.com/mozilla/pdf.js/wiki/Setup-pdf.js-in-a-website if you wish to just use the default viewer

Usage

For your convenience a sample app using angular is available under this repository, if you would like to see it in action (Folder SampleApp). It shows many ways to configure this component for different needs.

Once your PdfJsViewerComponent is imported you can use it in your Angular application like this:

{{title}}

Here is a use case to download and open the pdf as byte array and open in new tab/window: Please note, pdfSrc can be a Blob or Uint8Array as well For [externalWindow]="true" to work, pop-ups needs to be enabled at browser level

Open Pdf

import { Component, ViewChild } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';
...

export class MyComponent implements OnInit { @ViewChild('pdfViewerOnDemand') pdfViewerOnDemand; @ViewChild('pdfViewerAutoLoad') pdfViewerAutoLoad; ...

constructor(private http: HttpClient) { let url = "api/document/getmypdf"; // Or your url this.downloadFile(url).subscribe( (res) => { this.pdfViewerAutoLoad.pdfSrc = res; // pdfSrc can be Blob or Uint8Array this.pdfViewerAutoLoad.refresh(); // Ask pdf viewer to load/refresh pdf } ); }

private downloadFile(url: string): any { return this.http.get(url, { responseType: 'blob' }) .pipe( map((result: any) => { return result; }) ); }

public openPdf() { let url = "url to fetch pdf as byte array"; // E.g. http://localhost:3000/api/GetMyPdf // url can be local url or remote http request to an api/pdf file. // E.g: let url = "assets/pdf-sample.pdf"; // E.g: https://github.com/intbot/ng2-pdfjs-viewer/tree/master/sampledoc/pdf-sample.pdf // E.g: http://localhost:3000/api/GetMyPdf // Please note, for remote urls to work, CORS should be enabled at the server. Read: https://enable-cors.org/server.html

this.downloadFile(url).subscribe(
(res) => {
    this.pdfViewerOnDemand.pdfSrc = res; // pdfSrc can be Blob or Uint8Array
    this.pdfViewerOnDemand.refresh(); // Ask pdf viewer to load/reresh pdf
  }
);

}

Additional Information

Given below are examples of writing server apis(In aspnetcore c#) which returns pdfs as byte array. You can choose any server side technology as long as pdf is returned as byte array

Use case 1. As a RDLC local report viewer ```c# [HttpGet] [Route("MyReport")] public IActionResult GetReport() { // var reportObjectList1 // var reportObjectList2 var reportViewer = new ReportViewer {ProcessingMode = ProcessingMode.Local}; reportViewer.LocalReport.ReportPath = "Reports/MyReport.rdlc";

reportViewer.LocalReport.DataSources.Add(new ReportDataSource("NameOfDataSource1", reportObjectList1)); reportViewer.LocalReport.DataSources.Add(new ReportDataSource("NameOfDataSource2", reportObjectList1));

Warning[] warnings; string[] streamids; string mimeType; string encoding; string extension;

var bytes = reportViewer.LocalReport.Render("application/pdf", null, out mimeType, out encoding, out extension, out streamids, out warnings); return File(bytes, "application/pdf") } ```

Use case 2. Return a physical pdf from server ```c# [HttpGet] [Route("GetMyPdf")] public IActionResult GetMyPdf() { var stream = await {{getstreamhere}} return File(stream, "application/pdf")); // FileStreamResult

// OR // var bytes = await {{getbyteshere}} // return File(bytes, "application/pdf") }

OR

[HttpGet] [Route("GetMyPdf")] public IActionResult GetMyPdf() { var pdfPath = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot/assets/pdfjs/web/greresearchvalidity_data.pdf"); byte[] bytes = System.IO.File.ReadAllBytes(pdfPath); return File(bytes, "application/pdf"); } ```

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License

MIT © Code Hippie

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