plotly/plotly.js v1.28.0 on GitHub

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]

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]

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]