v1.30.0

Added

• Add aggregate transform [#1924]
• Add constraintext attribute for bar traces [#1931]
• Add axis layer attribute to ternary axes [#1952]
• Add cross-trace matching auto-binning logic to histogram traces [#1944]
• Add data/layout/config api to Plotly.toImage to generate a static
  graph without having to render an interactive graph first [#1939]
• Add nameformat attribute to groupby transforms to set pattern by which
  grouped traces are named [#1919]

Fixed

• Fix hover label exponents [#1932, #1949]
• Fix scatter fill with isolated endpoints [#1933]
• Fix parcoords axis tick scale when ticktext is unordered [#1945]
• Fix sankey with 4 multi-links or more [#1934]
• Fix exponent labels beyond SI prefixes [#1930]
• Fix image generation for marker gradient legend items [#1928]
• Fix parcoords image generation when multiple parcoords graphs
  are present on page [#1947]
• Ignore bare closing tags in pseudo-html string inputs [#1926]

v1.29.3

Fixed

• Fix groupby / filter interactions when filter includes target data [#1892]

v1.29.2

Fixed

• Add fallback for ArrayBuffer.isView fixing gl2d and gl3d rendering
  in environments that don't support it (e.g. RStudio) [#1915]

v1.29.1

Fixed

• Fix axis line rendering when showticklabels is false (bug introduced in 1.29.0) [#1910]
• Fix histogram auto bin restyle [#1901]
• Fix colorbar edge case that caused infinite loops [#1906]

v1.29.0

Added

• Add touch interactions to cartesian, gl2d and ternary subplots including for
  select and lasso drag modes [#1804, #1890]
• Add support for contour line labels in contour and contourcarpet traces [#1815]
• Add support for select and lasso drag modes on scattermapbox traces [#1836]
• Add double click interactions to mapbox subplots [#1883]
• Add reset view and toggle hover mode bar buttons to mapbox subplots [#1883]
• Add support for array marker.opacity settings in scattermapbox traces [#1836]
• Add namelength layout and trace attribute to control the trace name's
  visible length in hover labels [#1822]
• Add cliponaxis attribute to scatter and scatterternary traces to allow
  markers and text nodes to be displayed above their subplot's axes [#1861]
• Add axis layer attribute with 'above traces' and 'below traces' values [#1871]
• Add granular editable configuration options [#1895]
• Expanded traces generated by transforms now have unique colors [#1830]

Fixed

• Fix axis line width, length, and positioning for coupled subplots [#1854]
• Fix alignment of cartesian tick labels [#1854]
• Fix rendering and updates of overlaying axis lines [#1855]
• Fix hover for 2D traces with custom colorbar tickvals [#1891]
• Fix hover and event data for heatmapgl and contourgl traces [#1884]
• Fix event data for pie and sankey traces [#1896]
• Fix drag mode 'pan'in IE and Edge [#1871]
• Fix bar, error bar and box point scaling on scroll zoom [#1897]
• Fix shading issue in surface trace in iOS [#1868]
• Fix lasso and select drag modes for scatterternary traces [#1831]
• Fix cases of intersecting contour lines on log axes [#1856]
• Safer construction of popup click handler [#1888]
• Fix animation of annotations, shapes and images [#1315]
• Fix histogram bin computation when more than 5000 bins are needed [#1887]
• Fix tick label rendering when more than 1000 labels are present [#1898]
• Fix handling of empty transforms item [#1829]

v1.28.3

Fixed

• Fix deselect on double-clicking for gl2d traces [#1811]
• Fix Plotly.purge for gl2d and gl3d subplots
  (bug introduced in 1.28.0, leading to memory leaks) [#1821]
• Fix hover labels for ohlc and candlestick traces
  (bug introduced in 1.28.0) [#1808]
• Fix event data for scattergeo traces [#1819]
• Fix support of HTML entity number in pseudo-html inputs [#1820]

v1.28.2

Fixed

• Fix IE rendering error (node.children doesn't work on SVG nodes in IE) [#1803]

v1.28.1

Fixed

• Fix scattergl selected points. Points do not disappear after zoom any more
  in fast mode [#1800]

v1.28.0

Added

• Allow constraints by domain on cartesian axes using new axis attributes:
  constrain: 'domain' and constraintoward [#1767]
• Add gl3d annotations [#1638, #1786]
• Add support for lasso and select dragmode on scattergl traces [#1657]
• Add 48 new scattergl marker symbols (for total of 56) [#1781]
• Add array support for hoverinfo [#1761]
• Add animation support for fillcolor attribute [#1722]
• Add colorscale attributes to mesh3d traces [#1719]
• Add support for target and popup attributes pseudo-html text links [#1726]
• Add per-direction updatemenu dropdown arrows [#1792]
• Add execute attribute to sliders and updatemenus to skip method calls while
  still triggering associated events [#1700]
• Add skip value to the method attribute for sliders and updatemenus which
  acts as a no-op [#1699]

Changed

• Include values of all array attributes in hover/click/select event data
  including ids and customdata [#1770]
• Make gl2d axis tick labels on-par with SVG versions [#1766]
• Build SVG text nodes directly instead of using DOMParser [#1783]
• Rework transform style into array syntax [#1794]
• Recompute hover on click to increase click robustness [#1646]
• Miscellaneous performance improvements including improved bounding box caching
  and adding a few short-circuit [#1772, #1792]

Fixed

• Fix pan/zoom for layout component linked to category axes [#1748, #1791]
• Fix non-linear gl3d axis range settings [#1730]
• Fix ohlc and candlestick when open value equals close value [#1655]
• Fix annotations positioning when MathJax symbols are present [#1788]
• Fix array values in event data for transformed traces [#1717, #1727, #1737]
• Fix relayout event data for gl3d camera interactions [#1732]
• Fix scatter markers and text nodes linked to ids ordering on updates [#1709]
• Fix Plotly.validate for dynamic enumerated attribute
  (e.g. axis anchor, overlaying) [#1769]
• Fix pseudo-html handling in sliders, updatemenus, range-sliders,
  range-selectors and carpet traces [#1792]
• Fix annotation bounding box and arrow heads in IE [#1782]
• Fix svg exports in IE for graphs with multiple clip paths [#1740]
• Fix sankey positioning in IE [#1723, #1731, #1729, #1735]
• Fix relative links in IE [#1715]
• Suppress render warning in gl3d graphs with error bars [#1718]

v1.27.1

Fixed

• Fix text box positioning on scrolled windows (bug introduced in 1.27.0) [#1683, #1690]
• Fix styling over links in annotation text [#1681]
• Fix mesh3d with vertexcolor coloring [#1686]
• Fix sort transform with set categoryarray [#1689]
• Fix scatter text node data join [#1672]
• Fix plot promise resolution in graphs with layout images in IE11 [#1691]