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If(req.resourceType() = 'stylesheet' || req.resourceType() = 'font' || req.Versions Compatible and additional computed target framework versions. We’ll dive into the code and make the basic crawler that will launch a new headless browser instance, open a new page (tab) and navigate to the URL provided in the command-line argument const puppeteer = require('puppeteer') īrowser = await puppeteer.launch() Now that we have set and configured everything let’s get started. This might take a while as Puppeteer needs to download and install Chromium in the background. Next, we’ll have to run the command to install puppeteer in the project root directory: npm install puppeteer -save This will create a file called package.json inside the directory. Go into the directory and run the command: npm init Now that we have node.js installed, let’s create a directory called disable_test and open the command prompt or terminal. To install node.js in Windows or Mac, download the package for your OS from Nodes JS’s website Once that’s done, install node.js by running, sudo apt install nodejs.Open a terminal run – sudo apt install curl in case it’s not installed.Here are the steps to install node.js in Ubuntu 16.04: Head over to and choose the distribution you want. Puppeteer requires at least Node v7.6.0 or greater but for this tutorial, we will go with Node v9.0.0. You need to first install node.js and write the code to disable images and CSS in JavaScript. If you already know how to install Puppeteer, skip to the next section. Make sure you check that the content of the site loads without CSS before scraping. In such a case, the content itself will not load if the CSS is disabled. Note: There are some websites which have content that is dependent on CSS. With images and CSS disabled, the page fully loaded in 6.5 seconds. When we loaded the page with images and CSS enabled, it took 15 seconds to load completely. Before each test, the browser and cache were cleared to make sure the results were accurate. To find the differences, we opened with images and CSS both enabled and disabled and tracked the total page loading time. The average page size is more than 2MB which is three times more than it was, just three years ago. Browsers take time to load embedded code as well as images, especially the big ones.

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