v1.51.1

Fixed

• Fix scattergl mising points plot and react (bug introduced in 1.33.0) [#4323]
• Skip non-numeric values in image trace plot [#4325]

v1.51.0

Added

• Add image trace type [#4289, #4307, #4313, #4319]
• Add automargin attribute in pie traces, enabling outside text labels
  to push the margins [#4278]
• Add title.standoff attribute to cartesian axes, setting the
  distance in pixels between the tick labels and the axis title [#4279]
• Add hoverongaps attribute to heatmap and contour traces,
  for suppressing hover labels on missing data [#4291]
• Add args2 attribute to updatemenus buttons which can be used to
  create toggle buttons [#4305]
• Add zh-CN locale [#4276, #4310]

Changed

• Introduce workarounds for "common" (aka axis) hover label clipping
  about the graph's viewport [#4298]
• No longer accept trace domain settings where end is not greater
  than start [#4304]

Fixed

• Fix streamtube coloring and positioning when generated
  with non-xyz grid signatures [#4271]
• Fix trace-type update calls on mapbox subplots [#4295]
• Fix width of box and violin items on log position axes [#4283]
• Fix box/meanline offset for one-sided vertical violin traces [#4314]
• Fix missing gaps in some scattergl line traces [#4316]
• Fix event data during scroll on gl3d subplots with orthographic projections [#4292]
• Handle data with identical positions in cone traces [#4306]
• Handle invalid entry before trying to render treemap trace [#4312]
• Fix heatmap and contour description for connectgaps [#4284]

v1.50.1

Fixed

• Guard against mirrored + automargin anchor:'free' axes (bug introduced in 1.50.0) [#4273]
• Fix streamtube trace starts case when missing a dimension [#4265]
• Fix scattergl performance for drawing legend items of traces with typed arrays [#4268]
• Fix legend item style for markers with typed array colors [#4268]
• Do not attempt to re-hover on exiting subplots [#4269]
• Fix "layout first" transition race condition [#4262]

v1.50.0

Added

• Add treemap trace type [#4185, #4219, #4227, #4242]
• Add texttemplate attribute to all traces that support on-graph text [#4071, #4179]
• Add date custom formatting in hovertemplate and texttemplate e.g.
  '%{x|%b %-d, %Y}' [#4071]
• Add transition support to bar trace length, width, on-graph text positioning,
  marker style and error bars [#4180, #4186]
• Add attribute count, colorscale support and many hoverinfo / textinfo flags
  to sunburst traces [#4185, #4245]
• Add constraint info to parcats click and hover events [#4211]
• Add support for legend scrolling via touch interactions [#3873, #4214]
• Add ru and uk locales [#4204]
• Publish minified dist npm packages for the main plotly.js bundle and
  all our partial bundles [#4169]

Changed

• Cap the number of redraws triggered by the auto-margin routine,
  which should prevent all potential infinite redraw loops [#4216]
• Improve cartesian axis draw performance by (1) computing its bounding box
  only when required and (2) using a bounding-box computation cache [#4165]
• Log message when margin-push values are too big to be considered during
  auto-margin computations [#4160]
• Log message when legend position is constrained into graph viewbox [#4160]
• Process layout image using data URI synchronously [#4105]
• Adapt default axis ranges to rangemode values 'tozero' and 'nonnegative' [#4171]
• Show zeroline even when no grid lines are present [#4189]
• Use mapbox-gl version 1.3.2 [#4230]
• Make touchmove event listener non passive on mobile drag [#4231]
• Improve streamtube trace description [#4181]
• Improve indicator trace description [#4246]
• Improve legend x and y attribute descriptions [#4160]

Fixed

• Fix attempt at fixing gl3d in Chrome 77 problems [#4256]
• Fix numerous legend positioning bugs [#4160]
• Fix numerous axis automargin bugs [#4165, #4216]
• Correctly handle <br> and \n in scattermapbox on-graph text [#4176]
• Fix scattergl hover over nulls (bug introduced in 1.45.0) [#4213]
• Correctly remove off-screen annotations during pan interactions
  (bug introduced in 1.40.0) [#4170]
• Fix contour and contourcarpet label formatting via colorbar settings
  (bug introduced in 1.48.0) [#4177]
• Fix background rectangle dimensions for horizontal grouped legends [#4160]
• Correctly handle non-linear axis types during transitions [#4249]
• Fix branchvalues: 'total' for generated sunburst sectors [#4253]
• Fix Download plot translations [#4148]
• Fix fr translations for "Click to enter --- title" [#4204]
• Fix tiny zoombox behavior [#4188]
• Fix rendering of constraint contours with rounded-off edge path [#4102]
• Fix "autoscale" modebar button bug where it sometimes toggled axis showspikes [#4241]
• Fix multi-axis transition axis-to-axis range "leaks" [#4167]
• Fix toggleHover and resetViews modebar buttons for
  some partial bundle + graph setups [#4184]
• Correctly list color-rgba module as dependency [#4207]
• Fix third-party dependency listing for gl-cone3d and gl-streamtube3d [#4208, #4215]
• Fix line.width attr declaration in *contour traces [#4218]
• Remove hover attribute from carpet and contourcarpet schema
  (as they do not support hover yet) [#4102]

v1.49.5

Fixed

• Clear rejected promises from queue when calling Plotly.react [#4197]
• Do not attempt to remove non-existing mapbox layout source and layers [#4197]
• Invalid mapbox layout layers with blank-string tile entries [#4197]
• Fix hover labels for choroplethmapbox with number locations items [#4197]

v1.49.4

Fixed

• Fix access token validation logic for custom mapbox style URLs
  (regression introduced in 1.49.0) [#4144]
• Fix rendering of cartesian ticks under mirror: 'all' [#4140]

v1.49.3

Fixed

• Fix graphs with visible: false sankey traces [#4123]
• Fix scattergl with mode: 'text' and text arrays longer
  than the coordinates arrays [#4125, #4126]
• Fix rangeslider positioning when left margin is pushed
  by other components [#4127]

v1.49.2

Fixed

• Fix gl3d hover behavior when multiple points share identical position [#4096]
• Fix [email protected] dependency version listing in package.json [#4094]
• Fix decimal and thousands separator declaration for Italian (it) locale [#4122]
• Fix indicator steps attribute declaration [#4115]
• Performance fix - use Axes.prepTicks (not Axes.calcTicks) for indicator
  number and delta formatting [#4099]

v1.49.1

Fixed

• Fix parcoords bug when dimension values are all zeroes (bug introduced in 1.49.0) [#4080]
• Fix parcoords select line rendering when constraint range falls below range [#4083]
• Fix parcoords select line rendering when selecting outside displayed axis range [#4087]
• Fix parcoords select by click when preceded by click away from axis [#4089]
• Fix mapbox.style values in attribution declaration [#4079]
• Remove unused variable from scatter3d shader [#4090]

v1.49.0

Added

• Add indicator traces [#3978, #4007, #4014, #4037, #4029]
• Add choroplethmapbox traces [#3988]
• Add densitymapbox traces [#3993]
• Add new mapbox style values: open-street-map, carto-positron, carto-darkmatter,
  stamen-terrain, stamen-toner, stamen-watercolor and white-bg
  that do not require a Mapbox access token [#3987, #4068]
• Add support for sourcetype value raster and image and type raster
  for mapbox layout layers [#4006]
• Add below attribute to scattermapbox traces [#4058]
• Add support for below: 'traces' in mapbox layout layers [#4058]
• Add sourceattribution attribute to mapbox layout layers [#4069]
• Add labelangle and labelside attributes to parcoords traces [#3966]
• Add doubleClickDelay config option [#3991]
• Add showEditInChartStudio config option [#4061]

Changed

• Bump mapbox-gl to v1.1.1 [#3987, #4035]
• Include source attribution on mapbox subplots and image exports [#4069]
• Improve mapbox error messages and attribute descriptions [#4035]
• Do not try to resize hidden graph divs under responsive:true [#3972]
• Improve robustness of sankey traces with circular links [#3932]
• Use URL.createObjectURL during Plotly.toImage and
  Plotly.downloadImage improving performance [#4008]
• Make parcoords pick layer 100% invisible [#3946]
• (dev-only) drop "pull-font-svg" pre-process step [#4062]

Fixed

• Fix rendering of geo traces with locationmode and no base layers
  (bug introduced in 1.48.0) [#3994]
• Fix lakes and rivers geometry on scoped geo subplots
  (bug introduced in 1.48.0) [#4048]
• Fix heatmap rendering for traces with extra categorical coordinates
  (bug introduced in 1.48.0) [#4038]
• Do not show zero-height bar rendering when their marker.line.width is zero
  (bug introduced in 1.48.3) [#4056]
• Do not show prefix and suffix on log axis minor ticks showing digits [#4064]
• Fix inconsistent parcoords behavior when data is outside range [#3794]
• Fix parcoods default tick formatting [#3966, #4011, #4013]
• Fix pseudo-html and MathJax rendering for parcoords traces [#3966]
• Fix marker.line.color default for choropleth traces [#3988]
• Fix scatter3d and scattergl handling of rgb colors
  with extra alpha values [#3904, #4009]
• Fix zoomed-in box/violin hover labels edge cases [#3965]
• Fix hoverinfo & hovertemplate initial, delta and final flags
  for waterfall traces [#3963]
• Fix hovertemplate default number formatting for
  choropleth, scattergeo, scatterpolar(gl), barpolar
  and scatterternary traces [#3968]
• Remove sliders / updatemenus command observer mutation [#4023]
• Fix plot-schema anim listing for traces that do not (yet) animate [#4024]
• Fix rangeslider style during selections [#4022]
• Fix per-value categoryorder for box and violin traces [#3983]
• Fix handling of non-numeric marker.line.width array items [#4056, #4063]
• Fix downloadImage for images of more than 2MB in size in Chrome [#4008]
• Fix plotly_clickannotation triggering when editable:true [#3979]
• Remove unused font-atlas-sdf dependency [#3952]
• Fix tickformat attribute description links to d3 formatting language [#4044]
• Fix typo in error_(x|y).type description [#4030]
• Fix typo in colorscale description [#4060]