htrefa.blogg.se - Puppeteer screenshot path

This can then be parsed using packages like Cheerio. It directly sends a get request to the web page and receives HTML content. The first method uses packages e.g., Axios. Generally, there are two methods of accessing and parsing web pages. There are a few methods to accessing and parsing web pages, but in this tutorial we will be covering how to do it with Google Puppeteer. const browser = await puppeteer.Web scraping and automation with JavaScript has evolved a lot in recent years. To change this, we can manually set the height and width of the viewport we prefer in options passed to puppeteer.launch(). Defining the browser viewportīy default, Puppeteer will use a 800px by 600px viewport size for the browser. To do that, I had to make a few modifications to the default example from above. Taking a screenshot for the embedįor my use case, I needed to take a screenshot of the embed and save it as binary data, to later be uploaded to Cloudinary (affiliate link). This will take a screenshot of the page,, and save a PNG file to the current directory with the name screenshot.png. Here is how that looks: const puppeteer = require('puppeteer') Ĭonst browser = await puppeteer.launch() Īwait page.screenshot() To take a screenshot using Puppeteer, we have to go through four steps:

Puppeteer brings the power of headless chrome to a simple node API, enabling us to use headless chrome almost anywhere. chrome -headless -disable-gpu -screenshot To take a screenshot, we can use the -screenshot flag instead. To get the DOM contents of a page, for example, we can use the -dump-dom flag. Since version 59, headless Chrome has been available via the chrome command (Note: you may need to add an alias to use the command).

In this article, I will cover the first part of this solution, which is using a headless browser to create a screenshot of the page.

Update the fallback code to include the screenshot.

Create an API to handle the image generation and upload the image to Cloudinary.

Generate a screenshot of the embed page.

In order to achieve this end result, I had to go through a few steps: I had been thinking about how to solve this problem for a while, and finally settled that the best solution would be to programmatically take a screenshot of the embed page using a headless browser and adding that to the fallback code. This is because, until the script generates the iframe, the embed code looks like this: ĭata on support for the css-grid feature across the major browsers from. If for whatever reason Javascript was disabled, or even if the network was slow, this is what would be displayed: One thing that always bothered me about it is that was dependent on Javascript to display any data. In case you are interested, I wrote about how I created the embed. What am I trying to achieve?Ī couple of years ago, I created an embed for caniuse data of any particular feature. Another great use of headless browsers is to take screenshots of web pages dynamically. Headless browsers are useful for automating tests of websites as it allows us to navigate to a page and perform actions without having to manually open up a browser and click around. It is a way to navigate the web via the command line. A headless browser is a browser without the graphical user interface.