FrontendLab: SEO methods in single page applications - Вячеслав Потравный
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FrontendLab: SEO methods in single page applications - Вячеслав Потравный
- 1. SEO methods in SinglePage Applications Or how to make your app Google bot friendly
- 2. Вячеслав Потравный Vyatcheslav Potravnyy Front-End Team Lead at
- 4. What is a problem?
- 5. How SPA works for user? 1. User opens http://blog.ru/index.html#/articles/1 2. Emtpy index.html loading with links on JS 3. User loads an App (all JavaScript code) 4. Router starting - here we know about #/articles/1 5. Models starting and downloads JSON’s 6. Views starting and renders templates 7. PROFIT! User see the content
- 6. How SPA works for Google bot? 1. Bot opens http://blog.ru/index.html#/articles/1 2. Emtpy index.html loading with links on JS
- 7. What is the solution?
- 8. What does Google advice? 1. Bot see URL .../index.html#!/articles/1 2. Bot knows it’s AJAX site, and does not use this URL. It uses .../index.html?_escaped_fragment_=/articles/1 3. We handle this on server, and send rendered HTML 4. Bot associates this page with original URL 5. PROFFIT!
- 9. But if we have no hashbang? 1. Bot downloads page .../index.html 2. Bot sees <meta name="fragment" content="!"> 3. Bot downloads .../index.html?_escaped_fragment_= 4. Server rendering
- 10. How to render App?
- 11. 1. Write all on server framework As webapps used to be written years ago.
- 12. 2. Write content parts on server framework (like Twitter) + Native solution - Rewrite a lot + User gets content fast - Duplicate code - Complexity grows - Only main content indexed - No longer a frontend app
- 13. 3. Run in browser and save HTML + Not a lot of work + Architecture independed + Bot gets the same page - Slow and hard for server
- 14. Manually?! No. Headless browser ❏ HtmlUnit ❏ crawljax ❏ watij ❏ Phantom JS
- 15. How does this work? 1. Bot request .../index.html?_escaped_fragment_=/page 2. We filter this request to another route 3. We run headless browser with original URL 4. Let all requests be finished 5. Get final HTML from headless browser 6. Remove <scripts> from HTML 7. Response to Google bot 8. PROFIT!
- 18. What can be improved? 1. Rendering delay a. Make on CRON and save on disk b. Cache with nginx or Varnish 2. Loading detection a. Wait for all requests b. Flag on body c. App event, handled on Node.js side
- 19. What about future? Full-stack (aka Isomorphic)
- 20. Benefits 1. Both server & client written in one language - JS 2. You can reuse generic code on server & clients 3. Server-side rendering for SEO & performance? 4. Simply create two-way API’s
- 21. Derby.js
- 22. 1. SEO from the box 2. Huge localization abilities 3. Device adaptiveness abilities 4. Production-ready 5. Based on YUI
- 23. 1. Almost Backbone 2. Very light and flexible 3. SEO from the box 4. Its framework, not a plug-in library 5. Too simple for huge apps
- 24. Meteor.js 1. Access to data from everywhere 2. 2-way API with Latency Compensation 3. Simple dive-in 4. Biggest community 5. Own packages instead of NPM 6. SEO through phantom.js
- 25. Atma.js 1. SEO from the box 2. Component ideology 3. Complex solution - lot of tools 4. No community yet 5. No documentation yet
- 26. Derby.js 1. SEO from the box 2. User gets HTML at very start 3. 2-way API and Realtime Collaboration 4. Most “smart” 5. Built on other open-source components 6. Hard to dive-in 7. Deps Redis & MongoDB
- 27. Questions? Sources: Google Specification Backbone Tutorials The Digital Self Year of Moo Derby.js Vyatcheslav Potravnyy Happy New Front-end! by Geeks Lab (January 18, 2014)