Issues

• Review release candidate v6.3.1

  vega/altair#4161 · Filter by author github-actions opened on Oct 1, 2026

• Error message names the wrong class or parameter in some unions and channels

  vega/altair#4155 · Filter by author mattijn opened on Sep 28, 2026

• Report both length and item-type errors for sequence values

  vega/altair#4112 · Filter by author dk3yyyy opened on Sep 3, 2026
  1

• Wrap raw dicts passed to bind= in Binding classes so validation errors use a live object's schema

  vega/altair#4111 · Filter by author dk3yyyy opened on Sep 3, 2026

• Interval example from tutorial not working on concat charts

  bugneeds-triage
  vega/altair#4104 · Filter by author liquidcarbon opened on Aug 19, 2026
  1

• Use Sequence type hints in .transform_...() methods of TopLevelMixin

  bugneeds-triage
  vega/altair#4087 · Filter by author Antyos opened on Jul 28, 2026

• [feat]: Union channels field with the | operator

  enhancement
  vega/altair#4084 · Filter by author Antyos opened on Jul 17, 2026
  14

• User set names are overridden by automatic

  bugneeds-triage
  vega/altair#4070 · Filter by author joelostblom opened on Jun 15, 2026
  2

• vega-lite 6.4.1 has broken tooltips

  bugneeds-triage
  vega/altair#4014 · Filter by author StephenJamesCashen opened on Apr 21, 2026
  5

• Support calculations inline in encodings

  enhancement
  vega/altair#3992 · Filter by author joelostblom opened on Apr 5, 2026

• Can we reduce the number of false-positives of the user warning: automatically deduplicated selection parameter

  bugneeds-triage
  vega/altair#3916 · Filter by author mattijn opened on Nov 12, 2025
  2

• inline marimo WASM notebooks for interactive examples

  enhancement
  vega/altair#3915 · Filter by author koaning opened on Nov 12, 2025
  49

• improve tests for python 3.14

  enhancement
  vega/altair#3906 · Filter by author mattijn opened on Nov 6, 2025
  12

• value of selection_interval should be list, not tuple

  bugneeds-triage
  vega/altair#3896 · Filter by author rambip opened on Oct 25, 2025
  2

• Bug: chart configure_axisBottom() has no effect if configure() is called later

  bug
  vega/altair#3841 · Filter by author connortann opened on May 20, 2025

• Use tools.versioning in more places

  maintenance
  vega/altair#3833 · Filter by author dangotbanned opened on Apr 25, 2025
  2

• Jupyterlab renderer does not correctly compute the extent for center stacked density plots

  bug
  vega/altair#3819 · Filter by author joelostblom opened on Mar 18, 2025
  1

• Inline SVG Rendering while removing external Dependencies

  enhancement
  vega/altair#3818 · Filter by author rekognizecode opened on Mar 14, 2025

• add new example to showcase a horizontal bar chart with negative values and labels

  enhancement
  vega/altair#3803 · Filter by author mattijn opened on Feb 13, 2025

• Add type when serialize x2 and y2 encodings as json

  bug
  vega/altair#3793 · Filter by author mauro-dribia opened on Feb 6, 2025

• Bar chart between two dates is not showing when using vegafusion

  bugneeds-triagevega: vegafusion
  vega/altair#3783 · Filter by author samesand opened on Jan 28, 2025
  1

• Dictionary for altair chart differs when the VegaFusion data transformer is used

  needs-user-responsequestionvega: vegafusion
  vega/altair#3782 · Filter by author firasm opened on Jan 26, 2025
  6

• Layering mark_rule and mark_text results in text duplication

  bugdocumentation
  vega/altair#3774 · Filter by author danhamill opened on Jan 17, 2025
  3

• Tracking: uv transition

  maintenance
  vega/altair#3773 · Filter by author dangotbanned opened on Jan 17, 2025

• Binding shift zoom does not work on second layered chart

  bugneeds-triage
  vega/altair#3767 · Filter by author mrkbutty opened on Jan 10, 2025