You'll learn: - Best practices based on Salesforce UX case study - How to craft a powerful design system with CSS - How to evaluate solutions to product problems

1. Designing an Enterprise
CSS Framework
​Stephanie Rewis
​Salesforce UX

2. Stephanie Rewis
@stefsull
Principal UX Engineer
Design Systems, Salesforce UX Engineering

3. Forward-Looking Statements
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5. ​How do I get my app
to look like this?

6. ​Can I use the CSS in my
app?

8. We'd like our prototypers to iterate
more rapidly.

9. We learned our style guide
was too static.

10. Lightning Design System
The next generation of living style guides

11. Lightning
Experience

12. Design System Components
CSS Framework + UI Library

13. Objects/Components
Lightweight
Modular
Reusable
Utilities
Non-semantic
Single Purpose
Dependencies
Tokens

16. clarity
Eliminate ambiguity. Enable people to see,
understand, and act with confidence.

17. Clarity and understandability
in class names

18. BEM Naming
Block
Element
Modifier

19. Let's build a house!
.house { block or component name }
.house__door { element or component part }
.house--red { modifier or component variation }
.house__door--white { variation of a component part }

20. We love documentation!

23. efficiency
Streamline and optimize workflows. Intelligently
anticipate needs to help people work better, smarter,
and faster.

24. Design audit and inventory of all
components in designer's comps

25. We broke the components down to
their smallest patterns and objects.

27. Applications have
some unique traits.

28. Lists are used for their semantics.

29. Enterprise applications demand
content and data-rich interfaces.
They lack vertical rhythm.

30. Heading levels may vary and our
components should be agnostic.

31. You can opt back in to the default
element style using utility classes
or a single wrapper.
<h2 class="slds-text-heading--medium slds-m-right--small">
Medium heading with a small margin on the right.
</h2>

33. Accessibility for all people and
devices is very important.

34. We baked accessibility in:
Semantics matter
ARIA roles
REM unit sizing
We’ve documented what needs to happen when JS is added

35. consistency
Create familiarity and strengthen intuition by
applying the same solution to the same problem.

36. Design Tokens
The basic atoms of the Design System

37. Types of Design Tokens
• Fonts
• Font Sizes
• Font Weights
• Line Heights
• Background Colors
• Text Colors
• Border Colors
• Shadows
• Spacing
• Sizing
• Animation Durations
• Media Queries
• Z-indexes

40. We play well with others.
.button
.slds-button

41. beauty
Demonstrate respect for people’s time and attention
through thoughtful and elegant craftsmanship.

42. SVG icons for beauty at every size

43. Components should render
beautifully at any width.

44. Get the Design System
https://www.lightningdesignsystem.com/
https://github.com/salesforce-ux/design-system/
https://github.com/salesforce-ux/design-system-starter-kit

45. Thank you