DevTools and Headless Chrome - The Automation Power-Couple

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DEVTOOLS & HEADLESS CHROME: THE AUTOMATION POWER-COUPLE

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Yonatan Mevorach @cowchimp

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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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Headless Browsers cbnd flic.kr/p/qnSPdN

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Chrome

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headless Chrome

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[ ] { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": { "time": // ... "09:00", "10:30", "10:30", "10:30", "10:30", "10:30", "10:30", "10:30", "11:30", "11:30", "11:30", "11:30", "11:30", "11:30", "11:30", "12:50", "12:50", "12:50", "12:50", "12:50", "12:50", "12:50", "13:50", "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "title": "Hacking the World with Digital Biology" }, "Building Mixed Reality Apps" }, "12-Factor, Cloud Native Enterprise Java Applications" }, "Building Evolutionary Architectures" }, "What's New in CSS?" }, "Building Performant Backends with Elixir" }, "ASP.NET Core in Production: Lessons Learned" }, "Stop Building Useless Software" }, "GDPR Compliance for Your Datastore" }, "Having Your Cake and Eating It Too — GraphQL in Reason" }, "The New Paradigm For Leading Teams in the Digital Age" }, "Dissecting the stdlib" }, "Reality is Becoming Virtual" }, "Functional Patterns for the Object Oriented" }, "Designing Distributed Systems with TLA+" }, "TDD on Android: Why and how?" }, "Practice Safe Networking" }, "Crafting Faster in the Dark" }, "Behind the Scenes at Gapminder: A Story about Data and Visualizations" }, "The Future of QA in the Age of AI" }, "Blazor, a New .NET Single Page Application Framework" }, "How to Be a High Performing Distributed Agile Team" }, "Java with a Clojure Mindset" },

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headless Chrome

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headless Firefox

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Chrome DevTools

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protocol Chrome DevTools

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DevTools Embedding Frontendapp WebSockets ChromeAPI Headless Adapted from content by © Sami Kyöstilä, Google goo.gl/yQi9kZ

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

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

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