kandi X-RAY | pdf-lib Summary
kandi X-RAY | pdf-lib Summary
Top functions reviewed by kandi - BETA
pdf-lib Key Features
pdf-lib Examples and Code Snippets
Trending Discussions on pdf-lib
i was looking for a solution to digitally sign a pdf with a self-signed certificat and came across a video in youtube explaining the process using pdf-lib and node-signpdf libraries. However, after following the instructions it didnt work as intended and encountered a problem:
- i executed the command ( npm i ) and (npm start ) as shown in the github repo of the project.
Demo ( 8 mins video ) : https://www.youtube.com/watch?v=OFZK5lc70OI&list=PLXUfmx2SIgyICZP-rA84Sle_ghq30W89N&index=4&t=1s...
ANSWERAnswered 2022-Mar-27 at 19:41
it appears that the problem is OS related. In fact , the code works fine under linux OS but have some issues with Windows OS related to import command. For windows OS replacing "import" commands with "require" commands solves the problem.
Im loading a PDF document I have to modify on the fly with PDF-lib....
ANSWERAnswered 2021-Dec-14 at 18:20
Per the documentation,
PDFDocument.load() accepts a string which is the contents of the pdf file, not the name.
I have one pdf file and one image file which is the signature of the client. I need to place the client signature image on the top right corner of every page of pdf. This whole process is in node js so I have used the pdf-lib npm package to attach image on pdf. The current issue I'm unable to place the image on the top-right corner.
Below is the logic which I used to set an image on the top-right corner of the pdf but this logic is not true for every case in some cases when the width of the image or pdf changes then it's not worked as expected. Sometimes images are getting too much small or sometimes too much large.Just because I set fix height and width. As I don't know how to calculate it dynamically
ANSWERAnswered 2021-Dec-21 at 09:39
I got the solution to get dynamic x and y values to set an image on the top-right corner of the pdf
What color format is pdf-lib using? Writing
rgb(156, 132, 678) or
cmyk(157, 145, 124, 135) throws an error where all number values must be between 0 and 1.
How do I convert standard rgb, ie. 0-255 to whatever format this is?
The docs give me the TypeScript definitions of the function but no explanations....
ANSWERAnswered 2021-Nov-04 at 15:15
Documentation gives an example like this
color: rgb(0.95, 0.1, 0.1). Dividing by 255 is likely the solution.
pdf-lib(JS library) in my React project. I am doing heavy work with the library with
async/await and would like to update progress bar by updating state. Even though I call
setTimeout, the state is updated after the heavy work ends. So the progress bar shows only 0% and 100%. Could you kindly figure it out? I can't share my code, but if you want, I will show a little.
ANSWERAnswered 2021-Oct-13 at 03:20
Remember that "asynchronous" does not mean it runs "in parallel". It just means that code gets to run "out of order" in a controlled fashion.
Your page thread is just a single thread, so if you have a long-running function, you can mark that function as
async or run it with
setTimeout as much as you like but while your function code runs, nothing else gets to run (although in the case of
async: only until the code hits an
await, which I'm assuming pdf-kit does not use).
If you need to do heavy lifting, use a service worker, which is a special API for exactly this thing, running heavy workloads in a separate thread so that you don't block the main page thread.
I have tried to create a custom email receipt template with SendGrid using commercejs webhooks, by following this tutorial. I have uploaded this github repository to
this test Netlify site. The main code is
/functions/email.js I am pretty sure my
.env variables are correct, still no receipt emails are received and probably send. When checking the Netlify function email log says:
ANSWERAnswered 2021-Oct-03 at 23:57
Twilio SendGrid developer evangelist here.
You have installed node-fetch to the project, but the tutorial did not include requiring the library into the function to use it. So you need to require
The tutorial also fails to require the SendGrid library and set the API key. You should set your SendGrid API key in the environment in Netlify, called something like
SENDGRID_API_KEY. Then add the following to the top of your function:
this is my first time testing out Next.js API, I am also quite new to the whole Next.js/React world so bear with me.
The goal for this API route is to trigger an automatic download of a PDF with a custom watermark generated from API URL query parameters like this:
In order to create the watermark I am using pdf-lib and I am using a modified version of this code to watermark my PDF. To generate a modified and downloadable version of the original PDF
pdfDoc I have tried to create a blob using the
pdfBytes after the watermarking. After the blob is created I thought I could add it to an anchor attached to the DOM.
When commenting out the
anchor code, two errors occur:
- ReferenceError: Blob is not defined
- ReferenceError: document is not defined (possibility because there is no DOM to attach the anchor link)
At this point I am only able to print the
pdfBytes as json, I am not able to create and download the actual watermarked PDF file.
Is there a way to auto download the
pdfBytes as a PDF file when the API is called?
Working code below after changing
modifyPDF to return a buffer:
ANSWERAnswered 2021-Sep-25 at 09:01
modifyPDF to return a buffer
pdflib and it works perfectly for me. But I can't get it to write a message on all the pages of the PDF.
How can I make it so that, if I upload a 7 pages PDF, the message appears on all 7 pages. And if I upload a 5 pages PDF, it appears on all 5 pages.
And I tried using
if but I didn't get it in the end.
ANSWERAnswered 2021-Apr-01 at 13:44
Not sure if it is the "diagonal message" that you are trying to write on all pages but if so, instead of only getting the first page with
const firstPage = pages you should iterate on all
pages to use
drawText() on each page.
My environment is node v12.16.1 with typescript added.
I am using
pdf-lib v1.16.0 (https://www.npmjs.com/package/pdf-lib) in order to fill the form for given PDF file. Library source code can be found here https://github.com/Hopding/pdf-lib and more on docs here https://pdf-lib.js.org/.
pdf-lib has a set of called
StandardFonts which is provided inside the lib.
ANSWERAnswered 2021-Feb-07 at 18:18
pdf-lib relies on a sister module to support embedding custom fonts: @pdf-lib/fontkit. You must add the @pdf-lib/fontkit module to your project and register it using pdfDoc.registerFontkit(...) before embedding custom fonts.
We have to
npm i --save @pdf-lib/fontkit and we have to have source from where which we will read the font. In my case I have added
.otf file in project and loaded font. Files are structured like on the image:
I'm trying to quickly write a simple tool in NodeJS using pdf-lib. pdf-lib appears to be designed to use promises and async/await, but I don't want the extra code complexity of async/await for such a simple tool.
How can I use functions that return a promise without the extra bother of async/await?...
ANSWERAnswered 2021-Jan-27 at 05:07
Since the library primarily uses Promises, you will have to learn how to use Promises regardless, if you want to be able to use the library.
If you think
await will be too difficult, you can construct
.then chains instead. When you start with a Promise or have a Promise inside a
.then, make another
.then, whose callback will run when the Promise resolves. For example, this:
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