How Cloudinary eases Responsive Web Design, and more

https://talks.nicolas-hoizey.com/QQdc6Y/how-cloudinary-eases-responsive-web-design-and-more

Thoughts on Responsive Images, the Cloudinary plugin for Jekyll, and more!

From the registration page: "Please join us for a fabulous networking dinner and drinks! You will also get a chance to hear from Nicolas Hoizey web facilitator extraordinaire, Amit Sharon VP Customer Success and a shared use case from one of our very own Cloudinary customers!"

Transcript

1. How Cloudinary eases Responsive Web Design …and more Nicolas Hoizey London, October 18th
2. Hello, I’m Nicolas Hoizey Co-founder and CTO of France (6 Agencies) Canada Switzerland Hong Kong Singapore a full-service agency covering the entire digital production chain
3. Hello, I’m Nicolas Hoizey Co-founder and CTO of Clever Age Web projects facilitator RWD and WPO expert Amateur photographer
4. Let’s talk about Responsive Images
5. Responsive Images are fluid…
6. The HTML: <img src="image.jpg"> The CSS: img { max-width: 100%; height: auto; } !
7. The HTML: <img src="really-huge-image.jpg"> The CSS: img { max-width: 100%; height: auto; } "
9. You must send different images to each device
10. Most of the time, you only need several sizes of the same image
11. Here comes the new responsive images standard!
12. Beau Soleil Banner Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Menu Menu Menu Menu Menu Beau Soleil Banner Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Menu Menu Menu Menu Menu BS Banner Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. For a full width banner
13. The HTML: <img src="fallback.jpg" srcset="small.jpg 320w, medium.jpg 800w, large.jpg 1200w, extra-large.jpg 1600w">
14. Viewport width: 360px Screen density: 3 Ideal image width = viewport * density = 360 * 3 = 1080px Available images: 320, 800, 1200, 1600 !
15. Viewport width: 2560px Screen density: 2 Ideal width = 2560 * 2 = 5120px "
16. Viewport width: 1200px Screen density: 2 Ideal width = 1200 * 2 = 2400px #
17. Beau Soleil Banner Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Menu Menu Menu Menu Menu Beau Soleil Banner Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Menu Menu Menu Menu Menu BS Banner Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. For a variable width thumbnail 480px 800px full width one half one third
18. The HTML: <img src="fallback.jpg" srcset="small.jpg 320w, medium.jpg 800w, large.jpg 1200w" sizes="(max-width: 480px) 100vw, (max-width: 800px) 50vw, 33vw">
19. Viewport = 1200px CSS size = 33vw ≈ 400px Viewport width: 1200px Screen density: 2 Beau Soleil Banner Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Menu Menu Menu Menu Menu Beau Soleil Banner Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Lorem ipsum dolor sit amet, consectet adipiscing elit. Menu Menu Menu Menu Menu BS Banner Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
20. Ideal image width = CSS size * density = 400 * 2 = 800px Available images: 320, 800, 1200 ! Viewport width: 1200px Screen density: 2
21. Most of the time, it will be enough!
22. But how do we get all these images on the server?
23. Option #1: Do it yourself
24. You upload the master on your server
25. Server computes and stores all sizes Master 320 800 1200
26. Browsers ask the server for specific sizes of the image 320 1200
27. You need: - the master image - an image processor - computing power - storage capacity - bandwidth
28. Option #2:
29. Upload the master on Cloudinary
30. Or just ask Cloudinary to fetch it
31. Cloudinary creates on the fly the sizes the browsers ask for 320 1200
32. Your image name: master.jpg The final image URL: /<transformations>/master.jpg = Cloudinary URL API access point = https://res.cloudinary.com/<account>/image/upload/
33. Your image name: master.jpg The final image URL: /w_320/master.jpg creates a 320px wide image, keeping the aspect ratio
34. The new HTML: <img src=" /w_600/master.jpg” sizes="…" srcset=" /w_320/master.jpg 320w, /w_800/master.jpg 800w, /w_1200/master.jpg 1200w"> $
35. You need: - the master image - a Cloudinary account - no local image processing - less computing power - less storage capacity - less bandwidth
36. But sometimes, you need Art Direction
37. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Art Direction BS Banner Landscape Lorem ipsum dolor sit amet, consectetur Lorem ipsum dolor Beau Soleil Banner Menu Menu Menu Menu Menu Landscape Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis odio dui, varius ac enim quis, accumsan porta nulla. Sed laoreet nibh sit amet lobortis porta. Donec sagittis est a tortor varius consectetur. Lorem ipsum dolor Beau Soleil Banner Menu Menu Menu Menu Menu Portrait Lorem ipsum dolor Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis odio dui, varius ac enim quis, accumsan porta nulla. Sed laoreet nibh sit amet lobortis porta. Donec sagittis est a tortor varius consectetur. Praesent sit amet sollicitudin mauris, non bibendum ante. Integer imperdiet in magna ac elementum. Sed arcu nibh, mattis ac tortor ultricies, consequat varius odio. Morbi at nunc at dolor auctor imperdiet in sit amet tortor.
38. The HTML: <picture> <source media="(min-width: 800px)" srcset=" /w_320/portrait.jpg 320w, /w_800/portrait.jpg 800w, /w_1200/portrait.jpg 1200w" sizes="…"> <img src=" /w_600/landscape.jpg" srcset=" /w_320/landscape.jpg 320w, /w_800/landscape.jpg 800w, /w_1200/landscape.jpg 1200w" sizes="…"> </picture>
39. You probably don’t want to upload two masters every time
40. Automate with Cloudinary /w_320/portrait.jpg /c_fill,w_320,h_450/…
41. Automate with Cloudinary % /w_320/portrait.jpg /c_fill,w_320,h_450/landscape.jpg
42. Much better, still with Cloudinary /w_320/portrait.jpg /c_fill,w_320,h_450,g_face/landscape.jpg
43. Much better, still with Cloudinary /w_320/portrait.jpg /c_fill,w_320,h_450,g_face/landscape.jpg $
44. You also want to optimize performance
45. Send the lighter image format image.JPEG : 96KB image.WebP : 27KB Firefox Chrome
46. The HTML: <picture> <source type="image/webp" srcset="small.webp 320w, medium.webp 800w, large.webp 1200w" sizes="…"> <img src="fallback.jpg" srcset="small.jpg 320w, medium.jpg 800w, large.jpg 1200w" sizes="…"> </picture>
47. The original JPEG image URL: /w_320/master.jpg The WebP image URL: /w_320,f_webp/master.jpg The image is now WebP
48. Or…
49. The original JPEG image URL: /w_320/master.jpg The better image URL: /w_320,f_auto/master.jpg The image is now in the best (lighter) format for the browser!
50. The HTML: <img src=" /w_600,f_auto/master.jpg" sizes="…" srcset=" /w_320,f_auto/master.jpg 320w, /w_800,f_auto/master.jpg 800w, /w_1200,f_auto/master.jpg 1200w"> $
51. Using Cloudinary with
52. Jekyll is one of the oldest and most popular static site generators. It takes content written in Markdown format, and uses Liquid templates to generate HTML pages.
53. Default way to add an image:  Generates standard image HTML: <img src="image.jpg" alt="alternative text">
54. https://nhoizey.github.io/jekyll-cloudinary/
55. An image with the jekyll-cloudinary plugin: {% cloudinary <preset> image.jpg alt="…" %} Generates responsive image HTML with <img> and srcset. You just have to define presets for: - The minimum and maximum widths - The number of sizes to generate - The layout with the sizes attribute
56. One last thing…
57. Cloudinary is not limited to responsive images It also allows multiple image manipulations. I use it to generate my opengraph images, for better sharing on social networks.
58. This post
59. Automatically gets this opengraph image
60. And here’s the post in Facebook
61. Here’s the URL: https://res.cloudinary.com/nho/image/fetch/e_blur:2000, c_crop,ar_1200:630,b_white/e_grayscale/w_1200/l_fetch:a HR0cHM6Ly9uaWNvbGFzLWhvaXpleS5jb20vYXNzZXRzL2xvZ29zL2Ns b3VkaW5hcnkucG5n,h_1.0,w_1.0,fl_relative,c_limit/b_rgb: 3d2e68,o_50/w_1120,c_fit,l_text:georgia_80:Cloudinary%2 0fait%20la%20promotion%20de%20mon%20plugin%20Jekyll,g_n orth_west,x_41,y_42,co_black,o_90/w_1120,c_fit,l_text:g eorgia_80:Cloudinary%20fait%20la%20promotion%20de%20mon %20plugin%20Jekyll,g_north_west,x_40,y_40,co_white/l_te xt:georgia_50:nicolas-hoizey.com,g_south_east,x_40,y_40 ,co_black/l_text:georgia_50:nicolas-hoizey.com,g_south_ east,x_41,y_41,co_white/https://nicolas-hoizey.com/asse ts/logos/cloudinary.png &
62. Thanks for your attention! nhoizey@clever-age.com @nhoizey ✉