v1.40.0

Added

• Allow contour, contourcarpet and histogram2dcontour to have
  corresponding legend items using showlegend [#2891, #2914]
• Add scatterpolar and scatterpolargl attributes r0, dr, theta0 and
  dtheta [#2895]
• Add layout attributes piecolorway and extendpiecolors
  for more control over pie colors [#2870]
• Add splom attribute dimensions[i].axis.type to easily override axis type
  in splom-generated axes [#2899]
• Add support for on-graph text in scatterpolargl traces [#2895]

Changed

• Use derequire browserify plugin to make bundling distributed npm package
  with browserify possible [#2905]
• Speed up cartesian axis autorange edits (and thus double-click interactions) [#2823]
• Do not clear WebGL context when scattergl graph has no visible:true
  traces, which speeds up e.g. legend interactions [#2860]
• Compute data extremes per trace, which improves performance in some cases [#2860]
• Use <linearGradient> to render filled colorbars [#2910, #2914]
• Rename trace module setPositions methods crossTraceCalc [#2868]
• Use [email protected] [#2863]

Fixed

• Fix scalar marker.size bounds in legend items [#2840]
• Fix positioning of legend symbols for traces with fills [#2891]
• Fix scattergl select -> double-click -> pan behavior [#2815]
• Fix scattergl marker for IE11 [#2863]
• Fix inheritance of explicit pie colors by later traces [#2870]
• Fix layer ordering on graphs with multiple contour traces with heatmap
  coloring [#2891]
• Fix layer ordering on visible toggling for contour-like traces [#2891]
• Fix cases where colorbars would be drawn over its bounds [#2910]
• Fix tickwidth edits on ohlc traces [#2823]
• Fix labels on splom-generated axes with categorical data [#2899]
• Fix handling of splom dimensions on axes of conflicting types [#2899]
• Fix splom trace visible edits [#2860]
• Fix splom select -> double-click -> pan behavior [#2899]
• Fix scatterpolargl behavior during angular and radial drag interactions [#2888]
• Fix handling of auto date ticks below our 100 microseconds limit [#2912]
• Fix scatter3d attributes which had incorrectly labeled textposition
  and textfont.family as arrayOk and contained unimplemented line.showscale
  and line.colorbar [#2879]
• Fix scattergl and scatterpolargl attribute declarations for hoveron [#2895]

v1.39.4

Fixed

• Fix tenths of milliseconds handling in old numeric date data
  (bug introduced in 1.21.0) [#2847]
• Fix yaxis overlaying yaxis2 layouts
  (bug introduced in 1.39.3) [#2857]

v1.39.3

Fixed

• Fix overlaying subplot configuration relayouts [#2831]
• Fix trace toggling from position-editable horizontal legends [#2829]
• Fix [un]selected.marker.opacity settings on scattergeo traces [#2827]
• Fix selections on some Robinson projections [#2827]

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 [email protected] [#2694]
• Use [email protected] [#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]