Plotly

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

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

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

Fixed
- Fix IE rendering error (`node.children` doesn't work on SVG nodes in IE) [[1803](https://github.com/plotly/plotly.js/pull/1803)]

Fixed
- Fix `scattergl` selected points. Points do not disappear after zoom any more
in fast mode [[1800](https://github.com/plotly/plotly.js/pull/1800)]

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

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

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

Fixed
- Fix text box positioning on scrolled windows (bug introduced in 1.27.0) [[1683](https://github.com/plotly/plotly.js/pull/1683), [#1690](https://github.com/plotly/plotly.js/pull/1690)]
- Fix styling over links in annotation text [[1681](https://github.com/plotly/plotly.js/pull/1681)]
- Fix `mesh3d` with `vertexcolor` coloring [[1686](https://github.com/plotly/plotly.js/pull/1686)]
- Fix `sort` transform with set `categoryarray` [[1689](https://github.com/plotly/plotly.js/pull/1689)]
- Fix `scatter` text node data join [[1672](https://github.com/plotly/plotly.js/pull/1672)]
- Fix `plot` promise resolution in graphs with layout images in IE11 [[1691](https://github.com/plotly/plotly.js/pull/1691)]