You can even open Chrome DevTools to inspect the test environment.
puppeteer-core is intended to be a lightweight version of Puppeteer for launching an existing browser installation or for connecting to a remote one. npm i puppeteer-core or 'yarn add puppeteer-core'. Puppeteer shines when it comes to debugging: flip the headless bit to false, add slowMo, and you’ll see what the browser is doing. Since version 1.7.0 we publish the puppeteer-core package, a version of Puppeteer that doesn't download any browser by default. When installed, it downloads a version of Chrome, which it then drives using puppeteer-core. Puppeteer v1.5.0 also exposes browser contexts, making it possible to efficiently parallelize test execution. Puppeteer is a headless Node library that provides a high level API for controlling Chromium or.
Generally the home directory is well-defined (even on Windows), but occasionally the home directory may not be available. Read more about using puppeteer on App Engine by following the official tutorial. To use puppeteer, simply list the module as a dependency in your package.json and deploy to Google App Engine. To download files with Puppteer we can either the browser's fetch feature - which will download the file into a javascript variable - or find and click the download button which will download the file to the browser's save directory: // start puppeteerĬonst browser = await puppeteer.launch() Īwait page._nd('Page. puppeteer is a product for browser automation. Starting from v19.0.0, Puppeteer will download browsers into /.cache/puppeteer using os.homedir for better caching between Puppeteer upgrades. The Node.js runtime of the App Engine standard environment comes with all system packages needed to run Headless Chrome.
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