The latest articles on DEV Community by Kumaran KM (@kumarankm). https://dev.to/kumarankm https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F492942%2F35fb1a41-60aa-4a1d-b96f-9357567aa7ed.jpg https://dev.to/kumarankm en Kumaran KM Sun, 07 Feb 2021 17:24:24 +0000 https://dev.to/kumarankm/merging-a-pdf-using-javascript-527i https://dev.to/kumarankm/merging-a-pdf-using-javascript-527i <h2> Before merging</h2> <p><a href="https://res.cloudinary.com/practicaldev/image/fetch/s--ACDgHoVi--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://dev-to-uploads.s3.amazonaws.com/i/0ggq58qzl8bvdcsmzd4k.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--ACDgHoVi--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://dev-to-uploads.s3.amazonaws.com/i/0ggq58qzl8bvdcsmzd4k.png" alt="Alt Text"></a></p> <p>Have you heard about pdflib library, you didn't so here is the documentation page for you.</p> <h2>Pdflib package</h2> <p><a href="https://www.npmjs.com/package/pdf-lib">Pdflib Package</a></p> <p>So here what I have done, First I have installed the package and Add this package to json file as usual. Then I have imported that package on code, Then I have used catch syntax to check for errors.</p> <p>Then we need to load the pdf that we need to merge with the help of the load method inside the asynchronous function. If you want to get pdf as a user input then you can try multer package, but for now, I don't need it. I will provide a documentation link for multer package below.</p> <p><a href="https://www.npmjs.com/package/multer">Multer package</a></p> <p>Then, then with create() method, I have created a new empty document. And then I have added the first pdf file into that document with the help of copyPages() method. Once I have copied the first pdf, then I will concatenate the second pdf with the same copypage method. Then the pdf will get merged into that new document, and now it's time for naming a file. With the help of writeFileSync() I have synced the file and named it with .pdf extension. So here what the output looks like.</p> <h2> After merging </h2> <p><a href="https://res.cloudinary.com/practicaldev/image/fetch/s--hs1GoX_z--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://dev-to-uploads.s3.amazonaws.com/i/5u30460cv79gdmeyb6ki.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--hs1GoX_z--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://dev-to-uploads.s3.amazonaws.com/i/5u30460cv79gdmeyb6ki.png" alt="Alt Text"></a></p> <p>Thanks for taking the time to read my blog.<br> Happy coding :)</p> javascript codequality webdev