How to add watermark to every page pdf file in javascript? - javascript

I have pdf file. I want to add watermark in every page. I want to do it using javascript, or using library. How i do that?
i know one of managing pdf file, its called jsPDF. But i dont know how to use it to import existing pdf file, and add watermark.
So, the result is a new pdf file with watermark in every page.
Example add watermark online in this link.
Edit :
That is not answer my question, because i need to import existing pdf file. How?

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Update and Add a clickable link in the PDF generated using simple-headless-chrome npm

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how to split/show indivisual file in multiple file input tag in html and associate input with each file

I am working on a project, in which I am giving a website platform for users to upload their files on server and server will print those files using hardware printer.For instance if a user is uploading a file for printing then he will need to select
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I want something like this,
This way i want
here each time i select file a new field should generate with those two inputs and when i click submit all files should be processed using php with respective copies and colourscheme for indivisual file. I seen many plugins like uploadify, jQuery File Upload, Plupload, Krajee Bootstrap File Input Demo etc.
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How can I access a local file by giving the local file path using HTML/JS/Jquery?

Let's say I've csv file in my C:/test/tes.csv and I've a text box in html file and paste the above path in text box. I've "Load Data" button near by the textbox. when I click on the button I want to alert the content of the file. Insted of default file picker in HTML/JS, there is anyway to load the data? I want to use it in my application.
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You should try and use the FileReader API, which allows you to read the contents of files (or raw data buffers) stored on the user's computer.
Eric Bidelman wrote this awesome article that can help you get started.

Generating image preview of a doc or pdf file

Hey guys I have searched a lot but didnt get any working solution for this problem.
I am working on a site using jsp and on this we have to upload forms in doc / docx/ pdf format. I want to generate the preview of the first page of the form. So that user can checkout whats in the form before downloading it.
Hope someone will come up with some solution for this.
Thanks
Not sure what OS platform you are on for your jsp, but my recommendation would be to have a virtual printer driver that can "print" the document at hand to an image file (or as HTML). Then you can manipulate the output of the printer driver anyway you want. Extends itself nicely to other file formats as well.
Another version of this technique would be to programatically open the document with Microsoft Word (using ole automation), then do a screen capture after the document opens. Word can load PDF files as well. You'll have to find a creative way to get the document into a Windows desktop process from your server. But it could work.
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or
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Make sure you set the appropriate contentType of your forms doc/pdf/jsp using response.contentType("image/jpg");
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response.contentType("application/doc");

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