Added

• Add hovertemplate for candlestick and ohlc traces [#7619]
• Generate list of ISO codes for provided topojson maps, update info for some disputed territories [#7622]

Changed

• Turn off borders for plot container in CSS reset [#7617]

Fixed

• Fix KDE sampling precision in violin trace to eliminate floating-point drift and prevent density underrun/overrun [#7581], with thanks to @Koookadooo for the contribution!

Added

• Add hovertemplatefallback and texttemplatefallback attributes [#7577]

Fixed

• Fix wrong scrolling behavior for legend [#7067], with thanks to @Lexachoc for the contribution!
• Fix bug affecting use of customdata with typed arrays [#7608]

Full Changelog: v3.1.2...v3.2.0

Added

• Add "SI extended" formatting rule for tick exponents on axis labels, allowing values to be displayed with extended SI prefixes (e.g., femto, pico, atto) [#7249], with thanks to @dberardi99 for the contribution!

Fixed

• Fix editable title.text for ternary, polar, colorbar, and rangeslider (regression introduced in 3.0.0) [#7513], with thanks to @Lexachoc for the contribution!
• Fix layout.title.subtitle does not properly clear/remove from the chart when subtitle object is not in place, or subtitle.text set to null, empty string, or whitespace-only values [#7571], with thanks to @cminn10 for the contribution!
• Fix issue where visible property of one legend was affecting another [#7574]
• Resolve incorrect shape clipping for domain-referenced shapes on n*10th subplot [#7576]
• Update config diff check method to handle nested arrays [#7579]

Fixed

• Update plot with all config changes during call to Plotly.react [#7475]
• Fix wheel event handler Violation in Chromium by setting passive: true [#7517]
• Fix locationmode warning to be less aggressive: show warning only when locationmode is 'country names' [#7520]
• Refactor drawMainTitle to use context-specific selections for title and subtitle, avoiding conflicts when multiple plots are present on the same page [#7522], with thanks to @davibarbosa2 for the contribution!
• Fix broken styling of map attributions [#7526]
• Calculate colorscale properly for histogram when marker cmin/cmax/cmid values are undefined [#7534]
• Tidy up some stray characters in attribute descriptions [#7539], [#7540]
• Fix some typos (and a conditional check) [#7542], with thanks to @musvaage for the contribution!
• Fix cropping of subunits in USA topojson, clean up land and coastlines layers for all topojson [#7555]
• Fix issue causing empty ScatterGL plots when using text elements #7563

Full Changelog: v3.1.0...v3.1.1

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!

Added

• Add modebardisable attribute to cartesian axes, to allow fine control over which buttons affect which axes [#7358]
• 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

• Refactor files related to UN topojson [#7481]

Fixed

• 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!

Fixed

• Remove detailed description of font options [7348]

Fixed

• Fix installing dependencies in node v22 [#7381], with thanks to @chaigh-uk for the contribution!
• Fix Persian calendar leap year [#7456]
• Fix scroll wheel zoom for geo subplots in Safari [#7474]
• Add method to check for WebKit WebView user agent string [#7479]
• Fix edit colorbar title [7487]

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 support for ticklabelposition "inside"/"outside" for category axes with tickson set to "boundaries" [#7420],
  with thanks to @my-tien 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]

Fixed

• Fix installing dependencies in node v22 [#7381], with thanks to @chaigh-uk for the contribution!
• 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 Persian calendar leap year [#7456]

Changed

• Update color-rgba from 2.1.1 to 3.0.0 to fix hsl color conversion bug [#7325]

Fixed

• Fix click event handling for plots in shadow DOM elements [#7357]
• Fix hoverlabels and other text labels with null values templated in [#7360]
• Fix importing plotly.js via require on pages with AMD [#7367]
• Update Romanian locale [#7351]
• Update Italian locale [#4425]
• Update Turkish locale [#7352]