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The D3 JavaScript Library and Accessible Data Visualization

The D3 JavaScript Library and Accessible Data Visualization. Presented By: Brian P. McNeilly. CSUN 2018 Assistive Technology Conference March 21, 2018. What is D3?. D3 & Accessible Data Visualization. Data Driven Documents JavaScript library

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The D3 JavaScript Library and Accessible Data Visualization

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  1. The D3 JavaScript Library and Accessible Data Visualization Presented By: Brian P. McNeilly CSUN 2018 AssistiveTechnology Conference March 21, 2018

  2. What is D3? D3 & Accessible Data Visualization • Data Driven Documents • JavaScript library • Designed for rendering complex data visualization • Extremely customizable • Applications to other frameworks • D3plus & Chart.js levelaccess.com |(800) 899-9659 | info@levelaccess.com

  3. SVG vs HTML D3 & Accessible Data Visualization • SVG • Pros • Built for Graphics • Stable presentation • Cons • Less ARIA support • HTML • Pros • Wider ARIA support • More well known • Cons • Rendering inconsistencies levelaccess.com |(800) 899-9659 | info@levelaccess.com

  4. Examples

  5. Bar Chart

  6. Making Accessible Bar Charts D3 & Accessible Data Visualization • Thinking About Bar Charts • Axes • Bars • Color • Interaction • D3 Challenges levelaccess.com |(800) 899-9659 | info@levelaccess.com

  7. Sample Bar Chart: 2017 UK Elections D3 & Accessible Data Visualization levelaccess.com |(800) 899-9659 | info@levelaccess.com

  8. Line Graph

  9. Making Accessible Line Graphs D3 & Accessible Data Visualization • Thinking About Line Graphs • The Line • Axes • The “pip” • D3 Challenges levelaccess.com |(800) 899-9659 | info@levelaccess.com

  10. Sample Line Graph: Bitcoin Price in USD D3 & Accessible Data Visualization levelaccess.com |(800) 899-9659 | info@levelaccess.com

  11. Stacked Chart

  12. Making Accessible Stacked Charts D3 & Accessible Data Visualization • Thinking About Stacked Charts • “Bars” • Group Identification • Ownership • D3 Challenges • D3, Ownership, and d3.stack() levelaccess.com |(800) 899-9659 | info@levelaccess.com

  13. Sample Stacked Chart: DPRK Launches D3 & Accessible Data Visualization levelaccess.com |(800) 899-9659 | info@levelaccess.com

  14. Flare / Sunburst

  15. Making Accessible Flares / Sunbursts D3 & Accessible Data Visualization • Thinking About Flares / Sunbursts • Group identification • Ownership & levels • Interaction & content updates • D3 Challenges • Tackling ownership within d3.hierarchy() • Data & aria-owns levelaccess.com |(800) 899-9659 | info@levelaccess.com

  16. Sample Flare: Sign Language Families D3 & Accessible Data Visualization levelaccess.com |(800) 899-9659 | info@levelaccess.com

  17. Looking Forward

  18. Where Do We Go From Here? D3 & Accessible Data Visualization • Making accessible charts seamless • D3plus or Chart.js • SVG-AAM & SVG2 • SVG support for browser high contrast mode! levelaccess.com |(800) 899-9659 | info@levelaccess.com

  19. Any Questions?

  20. Thank You/Resources D3 & Accessible Data Visualization Contact Us Brian McNeillybrian.mcneilly@levelaccess.com Follow Us @LevelAccessA11y Level-Access Level Access Level Access Blog Slide Deck Available for Download at: https://www.levelaccess.com/csun18/ levelaccess.com |(800) 899-9659 | info@levelaccess.com

  21. Additional Resources & image citations D3 & Accessible Data Visualization • Chart / Graph / Diagram Links • 2017 UK Parliamentary Election Results Bar Chart • Bitcoin Price In US Dollars Line Graph • 2017 North Korean Test Launches Stacked Chart • Sign Languages By Linguistic Family Flare/Sunburst Diagram • Image Citations • D3 Logo via Wikipedia • All other images are screenshots from the above links levelaccess.com |(800) 899-9659 | info@levelaccess.com

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