pdf.js | PDF Reader in JavaScript | Document Editor library
kandi X-RAY | pdf.js Summary
kandi X-RAY | pdf.js Summary
PDF.js is a Portable Document Format (PDF) viewer that is built with HTML5. PDF.js is community-driven and supported by Mozilla. Our goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.
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pdf.js Key Features
pdf.js Examples and Code Snippets
Community Discussions
Trending Discussions on pdf.js
QUESTION
I found this code which, you select a pdf file in an input, and it returns the number of pages it has. It turns out that with this way of reading pdfs is the only one I have found that reads absolutely all pdfs correctly.
What I am trying to do is to isolate the code that reads the pdf file, so that I can pass it the path to the file instead of using the input. It is to then read all the files in a folder and display the total number of pages.
But I can't figure out where exactly I would have to pass the path to the pdf file.
...ANSWER
Answered 2022-Apr-14 at 20:32You can't.
Browsers don't let you access local paths on a user's computer for security reasons.
The browser doesn't get to know that the pdf is at /home/USERNAME/confidentialdocs/file.pdf
, it just gets a data blob with a given filename.
QUESTION
The goal is to render pages of a pdf to an offsrceen canvas to that I can copy portions of the page to a visible canvas. As a first step, the code below is intended to render the entire first page of a pdf. It renders to an offscreen canvas, then copies from offscreen to the visible canvas. Or that was my intention. Nothing appears.
...ANSWER
Answered 2022-Mar-23 at 19:45The code below does what was intended. I am still uncertain why the original code fails to work. My best guess is that it's due to something being done asynchronously.There's very little that's different about the two implemenations aside from that.
QUESTION
I’m using a select dropdown to load pdf files from a folder in my ASP.Net MVC project which works without a hitch. What I’m trying to achieve now is to load a pdf file when a user clicks on a file from the dropdown and load it. I’m able to retrieve some of the needed data but am unsure on how to proceed to make it work using ajax. Any guidance would be much appreciated. Below is what I have done so far.
...ANSWER
Answered 2022-Mar-11 at 03:10For rendering the updated html when ajax postback, you can use .html()
in success
function by default. You can see a simple example here. But in your scenario you use embed
element, it can only be updated with src
but cannot display the updated pdf by ajax. So I suggest use window.location.replace
which can send a new request to backend and update the pdf.
QUESTION
I am using A-Frame and pdf.js to create an application to view PDF files in VR. The application works as expected on desktop, including advancing to the next page of the PDF document and re-rendering to a canvas.
When running in a browser in VR (tested with Quest 2), the first attempt renders as expected. However, when rendering a second document page to the canvas, the new image fails to appear unless exiting VR mode, at which point the new texture appears as expected.
I have tried setting the associated material map.needsUpdate
repeatedly (in an A-Frame component tick loop) to no effect. While experimenting, I also noticed that if you try to render a new PDF page a second time and then another page a third time (advancing by two pages while in VR mode), when exiting VR mode, only the texture from the second time appears; the data from the third render appears to be lost - I wonder if this is related to the primary issue.
Code for a minimal example is below, and a live version is available at http://stemkoski.net/test/quest-pdf-min.html . When viewing the example in desktop mode, you can advance to the next page by opening the browser JavaScript console and entering testBook.nextPage();
and see that the image changes as expected. You can test in VR mode with a Quest headset; pressing the A button should advance to the next page.
The question is: how can I render pages of a PDF document to the same canvas, multiple times, while in VR mode in A-Frame?
...ANSWER
Answered 2022-Mar-05 at 14:51Found an answer here:
requestAnimationFrame doesn't fire when WebXR is engaged
Its quite relevant because pdf.js
uses requestAnimationFrame
by default when rendering the image onto the canvas.
It can be toggled though - the pages render function has an option intent
, which is later on used to determine whether to use requestAnimationFrame.
The sources You use are slightly different (older?), but if you search for creating the InternalRenderTask
in the render
function of the ProxyPDFPage
- it's all there:
QUESTION
Configuration:
- Web browser and its version: Chrome 97.0.4692.99
- Operating system and its version: MacOS 10.15.5
- PDF.js version: 2.12.313
- Is a browser extension: no
- I use the range request to render pdf
- I get more chunks with this line of code
await this.pdfManager.requestRange(ex.begin, ex.end);
; - These chunks are unnecessary when rendering first page;
- The program also seems to run fine when I comment this line of code, and I can get less chunks to make the first page faster;
- So what does this part of the code do?
- Is it possible not to execute it or not to use await?
ANSWER
Answered 2022-Feb-21 at 02:38In v2.12.313, PDFJS will check that the last page can be sucessfully loaded during document initialization, to ensure that numPages
is correct, and fallback to walking the entire /Pages-tree. #14570
QUESTION
I have used pdf-viewer-reactjs into my Next.js
project. But getting following error.
ANSWER
Answered 2022-Jan-31 at 14:17I was able to run the following code successfully, however it requires additional steps
- Install the babel runtime -
yarn add @babel/runtime
- courtesy this post. - Material UI icon gives an error, so similarly add the material UI dependencies
Assuming this is what you want:
Stackblitz - https://stackblitz.com/edit/nextjs-utkd32?file=pages%2Findex.js
QUESTION
I'm trying to redirect to another page with passing data after submitting form in using react-router-dom v6. When I will click on submit, data will be submited and the application will take me to the "Download PDF" page, also the form data will pass registration page to the "Download PDF" page.
Example Code:
ConfirmRegistration.js
...ANSWER
Answered 2022-Jan-25 at 11:53You can use useNavigate instead of using Navigate
QUESTION
I have a pipeline that does an npm install
followed by angular build and recently I added a caching task to relieve installation which was working splendidly until the developer added a new private dependency of "runtime-config-loader": "^3.0.0"
.
This may require npm re-install again, however, for some reason the caching task doesn't think it requires a re-install, and so it skips over the npm install
and then fails at the angular build, most likely because npm did not re-install on the agent.
I disabled the caching task and removed the custom condition eq(variables['CACHE_RESTORED'],False)
from the npm install
task, and the build is succeeding just fine.
Why is the cache not recognizing the need to re-install dependencies again? and how do I delete the cache so that npm installs again? As a reminder, when I disable the cache task and npm re-installs again on the agent, the build succeeds - so this is certainly a caching problem.
Here is the build YAML:
...ANSWER
Answered 2021-Dec-11 at 12:12It doesn't work because the new dependency is obviously not in the cache. Also the npm install
doesn't run. So that dependency is missing during build.
To fix it, you need to always run the npm install
, because you never know if there is a new dependency. Also, after install, if there were new dependencies installed, you should update the cache.
QUESTION
I am trying to follow the documentation for pdfjs found here https://www.pdftron.com/documentation/core/guides/features/manipulation/remove/ in an attempt to remove a page from a PDF I have uploaded to my html page. Here is my html code:
...ANSWER
Answered 2021-Dec-16 at 02:56Mozilla led pdf.js is primarily a browser plugin pdf viewer, without editor functions.
The function your calling doc.pageRemove(doc
is for use with PDFTron webview / edit SDK and thus specific to that commercial JavaScript library.
QUESTION
i want to rewrite all URLs with trailing ".pdf" to open the pdf-files in the mozilla.pdf.js and have successfully testet following RewriteRule and RewriteCond on my HTTP virtual host (I use apache2 on ubuntu server btw):
example URL to rewrite:
...ANSWER
Answered 2021-Dec-06 at 12:30example target URL after rewrite:
http://example.com/libs/mozilla.pdf.js/web/viewer.html?file=/downloads/dir2/file5/test.pdf
However, your directive does not currently do this. It redirects (not "rewrites") to http://example.com/libs/mozilla.pdf.js/web/viewer.html?file=downloads/dir2/file5/test
- note the missing slash at the start of the file
URL parameter value and the missing file extension.
This might be working on one server and not the other if MultiViews is enabled on the former. (This effectively enables extensionless URLs to "work".)
To correct the RewriteRule
directive:
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