v1.39.2

Fixed

• Fix scattergl selection after resize relayouts [#2801]
• Fix scattergl layout replot edits [#2793]
• Fix cartesian axis range animations (bug introduced in 1.37.0) [#2788]
• Fix contour labels that require thousands suffixes [#2806]
• Fix 'legendonly' legend items link to array marker.symbol [#2816]
• Fix handling of duplicate points under line.simplify [#2814]
• Fix transform removal via Plotly.react [#2805]
• Fix out-of-subplot scroll zoom on some geo projection types [#2811]
• Fix hover label in RTL pages [#2790]
• Reduce minified bundle back to their 1.39.0 sizes [#2792]

v1.39.1

Fixed

• Fix mapbox subplots in our minified bundles (bug introduced in 1.39.0) [#2789]
• Fix box and violin traces inner parts removal (bug introduced in 1.37.0) [#2785]

v1.39.0

Added

• Add distributed npm packages for the main plotly.js bundle and all our partial
  bundles for easy installation and bundling [#2670]
• Add template machinery along with helpers methods Plotly.makeTemplate and
  Plotly.validateTemplate [#2764]
• Add 3D streamtube traces [#2658]
• Add support for on-graph text in scattergl traces [#2737, #2783]
• Add gridshape attribute to polar subplots with values 'circular' (the
  default) and 'linear' (to draw polygon grids) [#2739]
• Add 'range' and 'change' aggregate transform functions [#2764]
• Add visible attribute to rangeselector and updatemenu buttons, slider
  steps and mapbox layout layers as well as tickformatstops items [#2761]
• Add support for colorbar linked to marker.color values for splom,
  scatterpolar and scatterpolargl traces [#2681]
• Revamp icon settings in custom mode bar buttons, allowing users to specify
  their own dimensions and SVG transforms [#2762]
• Add plotlyServerURL config option [#2760]
• Added no-WebGL warnings for graphs with scattergl, scatterpolargl, splom
  and parcoords traces [#2697]

Changed

• plotly_afterplot is now emitted after all edit types [#2773]
• Trace uid is no longer mutated into user trace objects [#2681]
• No longer add marker.line in scattermapbox fullData [#2766]
• Use regl@1.3.6 [#2694]
• Use mapbox-gl@0.45.0 [#2709]

Fixed

• Fix Plotly.react's handling of changing auto-margins [#2681]
• Make plotting/updating WebGL-based traces fail gracefully when WebGL isn't
  supported [#2697]
• Fix mapbox layout layer updates [#2734]
• Fix mapbox event inconsistencies [#2766]
• Correctly emit plotly_relayout at end of scroll on mapbox subplots [#2709]
• Fix scatter3d scalar hovertext handling [#2698]
• Fix line decimation for segments crossing the viewport [#2705]
• Fix surface trace contours when first level has length zero [#2712]
• Fix contour(x|y|z).highlight partial settings [#2712]
• Fix old date timezone precision in Chrome 67+ [#2747]
• Fix Plotly.validate for attribute with trailing numbers (e.g. x0, y1) [#2761]
• Fix x-only zoom moves when xaxis.fixedrange: true[#2776]
• Fix colorbar edits for parcoords and histogram traces [#2681]
• Fix bandwidth for single-value violins [#2775]
• Sanitize margin after 'autosize' relayouts [#2758]
• Make Plots.resize work when layout attribute is gone from graph div [#2710]
• Fix colorscale attribute descriptions [#2658]

v1.38.3

Fixed

• Fix cone axis padding when under sizemode: 'absolute' [#2715]
• Fix cone scaling on irregular grids [#2715]
• Fix cone sizemode: 'absolute' scaling and attribute description [#2715]
• Improve cone hover picking [#2715]
• Fix exception during histogram cross-trace computations [#2724]
• Fix handling of custom transforms that make their own data arrays [#2714]

v1.38.2

Fixed

• Fix bar text removal (bug introduced in 1.36.0) [#2689]
• Fix handling number 0 in hover labels and on-graph text [#2682]

v1.38.1

Fixed

• Fix transforms on scattergl traces [#2677]
• Fix marker.line.width scaling in scattergl traces [#2677]
• Fix [un]selected.marker.size scaling in scattergl traces [#2677]
• Create two not three WebGL contexts for scattergl/splom graphs
  (bug introduced 1.36.0) [#2656]
• Fix z updates of interpolated values on heatmap and contour traces with gaps [#2657]
• Fix select/pan double-click behavior when relayout from one another
  (bug introduced in 1.36.0) [#2668]
• Fix shift selection behavior after pan/scroll
  (bug introduced in 1.36.0) [#2676]

v1.38.0

Added

• Add 3D cone traces to visualize vector fields [#2641, #2647]
• Add ability to interactively change length and rotate line shapes [#2594]
• Add toImageButtonOptions config object to override to-image mode bar button options [#2607]
• Add Brazilian Portuguese (pt-br) locale [#2622]
• Add Italian (it) locale [#2632]

Changed

• Improve cartesian scroll and pan (mostly) performance for graphs with
  many marker or/and text nodes [#2623]
• Improve splom first render and axis-range relayout performance [#2628]
• Improve multi-axis axis-range relayout performance by updating minimal set of
  axes instead of all axes [#2628]
• Use "grab" cursor to denote when annotations and shapes are draggable [#2594]
• Ignore zero and negative link values in sankey traces [#2629]
• Ignore unused and malformed links sankey traces without logging [#2629]

Fixed

• Fix scattergl error bar computations when input value are numeric strings [#2620]
• Fix scattergl error bar computations for x0/dx and y0/dy coordinates [#2620]
• Fix violin kde span edge cases [#2650]
• Make sankey traces accept numeric strings [#2629]
• Fix axis range edits under axis constraints [#2620]
• Fix "sloppy click" event emission during cartesian zoom [#2649]
• Fix layout grid validation which lead to exceptions [#2638]
• Fix parcoords rendering in old Safari version [#2612]
• Link to https://get.webgl.org instead of http version in no WebGL message [#2617]

v1.37.1

Fixed

• Fix Plotly.react when adding/removing traces (bug introduced in 1.37.0) [#2603]

v1.37.0

Added

• Add plotly_legendclick and plotly_legenddoubleclick events [#2581]
• Add Swahili (sw) locale [#2526]

Changed

• Improve cartesian trace update and removal by using more d3-iomatic patterns.
  This results in some performance improvements during redraws [#2574]
• Our internal Lib.nestedProperty no longer prunes empty containers in
  gd.data, gd.layout, gd._fullData and gd._fulllayout.
  We made this change to clean up some of the Plotly.react internals.
  This also lead to a slight performance boost [#2577]

Fixed

• Fix Plotly.react's handling of transformed traces [#2577]
• Fix Safari support for scattergl and splom traces [#2593]
• Fix scattergl point clustering edge cases [#2593]
• Fix scattergl selection after double-click on graphs
  with more than 1e5 points [#2593]
• Fix artificial number of lines limit in scattergl traces [#2568]
• Fix typed array support in color array in scattergl traces [#2596]
• Fix typed array support for splom traces [#2596]
• Make scatter and scattercarpet coexist on same subplot [#2574]
• Fix incorrect fallback border color for axis common hover labels [#2557]
• Fix handling of blank editable legend items [#2587]
• Fix spikelines positioning in Firefox [#2590]
• Fix Plotly.react modebar updates when the locale changes [#2592]
• Fix scatter selection performance regression (dating back to 1.32.0) [#2583]
• Fix plotly_beforeplot and plotly_beforehover event handlers when attached
  with gd.once [#2581]

v1.36.1

Fixed

• Fix scattergl hover in dist and CDN bundles
  (due to browser-pack-flat discrepancy introduced in 1.36.0)
  by removing browser-pack-flat from our bundling pipeline [#2572]