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DEVTOOLS & HEADLESS CHROME: THE AUTOMATION POWER-COUPLE

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@cowchimp {{company}} Yonatan Mevorach

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”I can’t automate this” -- no one ever (after watching this talk)

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Web Automation youtu.be/fsF7enQY8uI

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flic.kr/p/qnSPdN cbnd Headless Browsers

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Chrome

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Chrome headless

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shlomi-noach has 208 followers!

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headless Chrome

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Firefox headless

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Chrome DevTools

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Chrome DevTools protocol

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Headless API Embedding app Chrome DevTools Frontend Adapted from content by © Sami Kyöstilä, Google goo.gl/yQi9kZ WebSockets

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Headless API Embedding app Chrome DevTools Frontend { id: 1, method: "Runtime.evaluate", params: { expression: "1 + 1" } } Adapted from content by © Sami Kyöstilä, Google goo.gl/yQi9kZ

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Headless API Embedding app Chrome DevTools Frontend { id: 1, result: { result: { type: "number", value: 2, description: "2" }, wasThrown: false } } { id: 1, method: "Runtime.evaluate", params: { expression: "1 + 1" } } Adapted from content by © Sami Kyöstilä, Google goo.gl/yQi9kZ

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Accessibility Console Device orientation Emulation Animation CSS DOM Heap profiler Application cache Database DOM debugger IndexedDB Cache storage Debugger DOM storage Input Inspector IO Layer tree Memory Network Page Profiler Rendering Runtime Security Service worker Tracing Worker Adapted from content by © Sami Kyöstilä, Google goo.gl/yQi9kZ

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Headless API Embedding app DevTools target DevTools client Adapted from content by © Sami Kyöstilä, Google goo.gl/yQi9kZ

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node --inspect index.js

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headless protocol

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chrome --headless --disable-gpu --remote-debugging-port=9222 http://summit2017.reversim.com

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chrome --headless --disable-gpu --remote-debugging-port=9222 http://summit2017.reversim.com

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chrome --headless --disable-gpu --remote-debugging-port=9222 http://summit2017.reversim.com

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chrome --headless --disable-gpu --remote-debugging-port=9222 http://summit2017.reversim.com

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chrome --headless --disable-gpu --remote-debugging-port=9222 http://summit2017.reversim.com

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chrome --headless --disable-gpu --remote-debugging-port=9222 http://summit2017.reversim.com

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Puppeteer Selenium DevTools Protocol

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pixabay.com/photo-175605 o

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pixabay.com/photo-175605 o

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goo.gl/j41BaC q Recap!

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blog.cowchimp.com @cowchimp tinyurl.com/ headless-talk