treasurezuloo.blogg.se - Nodejs print

#Nodejs print how to#
#Nodejs print pdf#
#Nodejs print install#
#Nodejs print free#

You can use Puppeteer on the backend and frontend to generate PDFs.

Generating pre-rendered content for Single Page Applications (SPAs).

Perform automated UI tests while keeping the test environment up-to-date.

Generate PDFs and screenshots of web pages.

To name a few use cases where Puppeteer provides the perfect functionalities for web developers, Puppeteer’s powerful browser-capabilities make it a perfect candidate for web app testing and web scraping. Due to the lack of a GUI, the interactions with a headless browser take place over a command line.Įven though Puppeteer is mainly a headless browser, you can configure and use it as non-headless Chrome or Chromium.

#Nodejs print how to#

In that sense, a headless browser is simply just another browser that understands how to render HTML web pages and process JavaScript. If you are unfamiliar with the term headless browsers, it’s simply a browser without a GUI. Is, “A Node library which provides a high-level API to control headless Chrome or Chromium over the DevTools Protocol”. What is Puppeteer, and why is it awesome? Let’s start the work with a quick introduction to what Puppeteer is.

#Nodejs print pdf#

In this tutorial, we will see how to convert web pages into PDF with Puppeteer and Node.js. No matter your reason, Puppeteer, Google’s Node API for headless Chrome and Chromium, makes the task quite simple for you. Otherwise, you might gloss over the fact that you cannot run the latest Puppeteer version and you also need to disable shm usage, using a flag: const browser = await puppeteer.As a web developer, you may have wanted to generate a PDF file of a web page to share with your clients, use it in presentations, or add it as a new feature in your web app.

#Nodejs print install#

If you install Puppeteer on the Alpine image, make sure you scroll down a bit to this part of the page. The official docs have a Troubleshooting section, where at the time of writing you can find all the necessary information on installing puppeteer with Docker. The official documentation states that “getting headless Chrome up and running in Docker can be tricky”. I think this is the trickiest part of the implementation – so let me save you a couple of hours of Googling. That was it! If you click on the save button, the PDF will be saved by the browser. Npm install html2canvas jspdf import html2canvas from 'html2canvas'Ĭonst domElement = document.getElementById('your-id') Html2canvas, to make a screenshot from the DOM This method is plain and simple: create a screenshot from the page, and put it in a PDF file. If you don’t have special needs, like selectable or searchable text in the PDF, it is a good and simple way to generate one. Option 1: Make a Screenshot from the DOMĪt first sight, this solution seemed to be the simplest, and it turned out to be true, but it has its own limitations. However, it probably makes more sense to let the backend handle it, as you don’t want to use up all the resources the user’s browser can offer.Įven so, I’ll still show solutions for both methods. It is possible to generate a PDF file both on the client-side and on the server-side.

Final option 3: Puppeteer, headless Chrome with Node.jsĬlient side or Server side PDF generation?.

Option 1: Making a Screenshot from the DOM.

Client side or Backend side PDF generation?.

This blogpost will walk you through on these possibilities and the final implementations.Ī personal comment before we get started: it’s quite a hassle, so buckle up! Table of Contents: So the PDF should have different styling and additions compared to the original React page.Īs the assignment was a bit more complex than what could have been solved with simple CSS rules, we first explored possible implementations. Furthermore, there were some special requests to manipulate the layout and make some rearrangements of the HTML elements.

That page is basically a report/result for patients with data visualization, containing a lot of SVGs.

#Nodejs print free#

Node.js is free of locks, so there's no chance to dead-lock any process., headless Chrome & Docker.īackground: A few months ago one of the clients of RisingStack asked us to develop a feature where the user would be able to request a React page in PDF format. In this article I’m going to show how you can generate a Puppeteer PDF document from a heavily styled React web page using Node.js Node.js is an asynchronous event-driven JavaScript runtime and is the most effective when building scalable network applications.