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First Public Working Drafts published by the CSS WG and TAG

June 7th, 2016

The Cascading Style Sheets (CSS) Working Group and Technical Architecture Group (TAG) have published four Working Drafts:

  • CSS Typed OM Level 1: Converting CSSOM value strings into meaningfully typed JavaScript representations and back can incur a significant performance overhead. This specification exposes CSS values as typed JavaScript objects to facilitate their performant manipulation.
  • CSS Properties and Values API Level 1: This CSS module defines an API for registering new CSS properties. Properties registered using this API are provided with a parse syntax that defines a type, inheritance behaviour, and an initial value.
  • CSS Painting API Level 1: The paint stage of CSS is responsible for painting the background, content and highlight of a box based on that box’s geometry (as generated by the layout stage) and computed style. This specification describes an API which allows developers to paint a part of a box in response to geometry/computed style changes with an additional function.
  • Worklets Level 1: This specification defines an API for running scripts in stages of the rendering pipeline independent of the main javascript execution environment.