Removed

• Drop support for passing a string to the title attribute, and drop support for deprecated attributes titlefont, titleposition, titleside, and titleoffset (use title.text, title.font, title.side, title.offset instead)[#7212]
• Drop deprecated pointcloud and heatmapgl traces and gl2d subplots [#7213]
  Drop support for deprecated bardir attribute (use orientation instead) [#7214]
• Drop support for deprecated annotation.ref attribute (use annotation.xref and annotation.yref instead) [#7215]
• Drop support for deprecated error bar opacity attribute (use alpha channel of error bar color attribute instead) [#7214]
• Drop support for deprecated attribute gl3d.cameraposition (use gl3d.camera instead) [#7217]
• Drop deprecated plot3dPixelRatio from config [#7231]
• Drop deprecated zauto, zmin and zmax from the surface trace [#7234]
• Drop deprecated autotick attributes from cartesian axes [#7236]
• Drop transforms from the API [#7240, #7254]
• Drop jQuery events support [#7224]
• Drop the AMD support from the bundle header [#7229]

Changed

• Switch from webpack to esbuild for fast builds & testing as well as allowing modern JavaScript beyond es5 [#6909]
• Make offsetgroup work with barmode "stacked" and "relative" for bar traces [#7009]
• Node v18 required for development [#7116]
• Cleanup remaining code that was there to support the Internet Explorer [#7251]
• Deprecate mapbox traces and provide links to migration docs for plotly.js and plotly.py users [#7260]

Fixed

• Remove inline styles that break plots in strict CSP setups [#7109],
  with thanks to @martian111 for the contribution!
• Allow null or broken selection objects without throwing an error [#7164]
• Render scatterternary traces correctly if they have the ids attribute [#7164]
• Do not convert url-sourced layout images to data URI unless we're in staticPlot mode, to improve interactivity when images are changed with zoom/pan [#7199]
• Fix source map of the mablibre dependency [#7204]
• Fix years in license [#7205]
• Maintain layout images element identity based on coordinates,
  for smoother updates when you add or remove images early in the list. [#7277]
• Fix handling of new domain values given in the Plotly.react function to
  prevent loss of new domain values. [#7283]