v4.0.0

New Features (and Examples)

Interactivity

• interactive legend

• selection support for lookup transform (example: index chart)

• selection support for bin extent (example: smooth histogram zooming)

Transforms

• regression and loess.

• density

• quantile

• pivot transform

Visual Encodings

• responsive width and height (Example) -- Thanks @donghaoren

• add gradient support for colors

• add image mark

• support for multiline text and subtitle (examples: Weekly Weather, Comparative Likert Scale Rating)

• support conditional axis + add examples (#5253)
  • Examples: Line Chart with Conditional Grid Dash, Lasagna Plot (Dense Time-Series Heatmap), Comparative Likert Scale Ratings

• support per-corner radius for bar marks (example) -- Thanks @donghaoren

• add "fit-x" and "fit-y" for autosize (#5224) -- Thanks @willium

• add band property for position field def (#5206) (b4dd9ac)

• make timeUnit for bar/rect behaves more like bin (#5096)

• support axis/legend labelExpr

Syntax Improvement

Visual Encodings & Configs

• make view width / height support {step: number}, replacing scale rangeStep

  • BREAKING CHANGE: deprecate scale rangeStep
  • BREAKING CHANGE: config.scale.rangeStep replaced with config.view.step
  • BREAKING CHANGE: config.scale.textRangeStep removed

• supporting channel name string for sorting by another encoding (e.g., sort: "x", sort: "-x")

• Move layout properties ( align, bounds, center, spacing, columns) to encoding's facet field definition (#5150)

  • BREAKING CHANGE: * deprecate (align, center, spacing, columns) from FacetedUnitSpec's schema

• other BREAKING CHANGES in config:

  • replace config.invalidValues with mark.invalid for mark definition and config (#5084)

  • remove config.stack, which is unnecessary

  • remove config.scale.bar/rectBandPaddingOuter, which are unnecessary

Style Change

• Improve time unit formats - Thanks @haldenl

  • BREAKING CHANGE: remove support for shortTimeLabel in axis/legend as we now use short format by default

• change default 1D bar size without scale to 18 (#5082)

• Make axes appear below marks by default

• Make geoshape with graticule data source unfilled (stroked) by default

More details: v3.4.0...v4.0.0