v3.1.0

Added

• Add property zerolinelayer to cartesian axes to allow drawing zeroline above traces [#7269]
• Add pattern.path attribute as an alternative to the preset pattern.shape values, so you can use any SVG path string as a pattern fill. [#7280]
• Allow configuration of horizontal legend max height [#7359]
• Add modebardisable attribute to cartesian axes, to allow fine control over which buttons affect which axes [#7358]
• Add support for ticklabelposition "inside"/"outside" for category axes with tickson set to "boundaries" [#7420],
  with thanks to @my-tien for the contribution!
• Add unifiedhovertitle.text to format unified hover titles [#7439]
• Add layout.hoverlabel.showarrow (and trace.hoverlabel.showarrow) attribute to allow hiding the triangular caret that appears on the hover label box [#7451]
• Add minorloglabels to cartesian axes [#7468]
• Make modebar keyboard-accessible via tabbing [#7492], with thanks to @davidangarita1 for the contribution!

Changed

• Switch to United Nations (coastlines, countries, land, ocean) + Natural Earth (lakes, rivers, subunits) geodata for building topojson used in geo plot [#7393]
• Make 'png' all caps [#7400]
• Refactor files related to UN topojson [#7481]
• Update default topojsonURL to point to new UN topojson [#7514]
• Add breaking change warning for country names locationmode option in choropleth, scattergeo plots [#7514]

Fixed

• Fix performance warning in scattergl traces, [#7390], with thanks to @MzyzzG for the contribution!
• Move css-loader and other dependencies into devDependencies section [#7407]
• Fix hidden ticklabels taking up plot space [#7417]
• Fix editable shapes (regression introduced in 2.34.0) [#7470], with thanks to @my-tien for the contribution!
• Update legend maxheight calculation logic [#7483]
• Fix hover event not triggered on consecutive empty bins (count=0) with hovermode:'x' for histogram [#7503], with thanks to @Lexachoc for the contribution!
• Remove form-data nested dependency associated with CVE-2025-7783 [#7514], with thanks to @KyleBoyer for the contribution!