The server returns JavaScript files or scripts injected into an HTML response, and the browser processes it. ![]() In other words, nowadays JavaScript rules the web, including almost everything you interact with on websites.įor our purposes, JavaScript is a client-side language. Now there are much more interactive web apps with beautiful UIs, which are often built with frameworks such as Angular or React. The last few years have seen the web evolve from simplistic websites built with bare HTML and CSS. What Is a Headless Browser and Why Is It Needed? puppeteerrc.cjs (or this article, we’ll see how easy it is to perform web scraping (web automation) with the somewhat non-traditional method of using a headless browser. Puppeteer uses several defaults that can be customized through configurationįor example, to change the default cache directory Puppeteer uses to installīrowsers, you can add a. Include $HOME/.cache into the project's deployment.įor a version of Puppeteer without the browser installation, see Your project folder (see an example below) because not all hosting providers Heroku, you might need to reconfigure the location of the cache to be within If you deploy a project using Puppeteer to a hosting provider, such as Render or The browser is downloaded to the $HOME/.cache/puppeteer folderīy default (starting with Puppeteer v19.0.0). When you install Puppeteer, it automatically downloads a recent version ofĬhrome for Testing (~170MB macOS, ~282MB Linux, ~280MB Windows) that is guaranteed to
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