Plotly

Added
- Add `plotly_legendclick` and `plotly_legenddoubleclick` events [[2581](https://github.com/plotly/plotly.js/pull/2581)]
- Add Swahili (`sw`) locale [[2526](https://github.com/plotly/plotly.js/pull/2526)]

Changed
- Improve cartesian trace update and removal by using more d3-iomatic patterns.
This results in some performance improvements during redraws [[2574](https://github.com/plotly/plotly.js/pull/2574)]
- Our internal `Lib.nestedProperty` no longer prunes empty containers in
`gd.data`, `gd.layout`, `gd._fullData` and `gd._fulllayout`.
We made this change to clean up some of the `Plotly.react` internals.
This also lead to a slight performance boost [[2577](https://github.com/plotly/plotly.js/pull/2577)]

Fixed
- Fix `Plotly.react`'s handling of transformed traces [[2577](https://github.com/plotly/plotly.js/pull/2577)]
- Fix Safari support for `scattergl` and `splom` traces [[2593](https://github.com/plotly/plotly.js/pull/2593)]
- Fix `scattergl` point clustering edge cases [[2593](https://github.com/plotly/plotly.js/pull/2593)]
- Fix `scattergl` selection after double-click on graphs
with more than 1e5 points [[2593](https://github.com/plotly/plotly.js/pull/2593)]
- Fix artificial number of lines limit in `scattergl` traces [[2568](https://github.com/plotly/plotly.js/pull/2568)]
- Fix typed array support in color array in `scattergl` traces [[2596](https://github.com/plotly/plotly.js/pull/2596)]
- Fix typed array support for `splom` traces [[2596](https://github.com/plotly/plotly.js/pull/2596)]
- Make `scatter` and `scattercarpet` coexist on same subplot [[2574](https://github.com/plotly/plotly.js/pull/2574)]
- Fix incorrect fallback border color for axis common hover labels [[2557](https://github.com/plotly/plotly.js/pull/2557)]
- Fix handling of blank editable legend items [[2587](https://github.com/plotly/plotly.js/pull/2587)]
- Fix spikelines positioning in Firefox [[2590](https://github.com/plotly/plotly.js/pull/2590)]
- Fix `Plotly.react` modebar updates when the locale changes [[2592](https://github.com/plotly/plotly.js/pull/2592)]
- Fix `scatter` selection performance regression (dating back to 1.32.0) [[2583](https://github.com/plotly/plotly.js/pull/2583)]
- Fix `plotly_beforeplot` and `plotly_beforehover` event handlers when attached
with `gd.once` [[2581](https://github.com/plotly/plotly.js/pull/2581)]

Fixed
- Fix `scattergl` in dist and CDN bundles
(due to `browser-pack-flat` discrepancy introduced in 1.36.0)
by removing `browser-pack-flat` from our bundling pipeline [[2572](https://github.com/plotly/plotly.js/pull/2572)]

Added
- Add `splom` (aka scatter plot matrix) traces [[2505](https://github.com/plotly/plotly.js/pull/2505)]
- Add multi-selection and click-to-select on `parcoords` axes [[2415](https://github.com/plotly/plotly.js/pull/2415)]
- Add selection and improve legend items for `ohlc` and `candlestick` [[2561](https://github.com/plotly/plotly.js/pull/2561)]
- Add 'fixed size' layout shapes through new shape attributes
`xsizemode`, `ysizemode`, `xanchor` and `yanchor` [[2532](https://github.com/plotly/plotly.js/pull/2532)]
- Add layout attribute `selectdirection` to restrict select-box direction [[2506](https://github.com/plotly/plotly.js/pull/2506)]
- Add support for selections on graphs with range sliders [[2561](https://github.com/plotly/plotly.js/pull/2561)]
- Add support for ragged `table` inputs [[2511](https://github.com/plotly/plotly.js/pull/2511)]
- Add Czech (`cs`) locale [[2483](https://github.com/plotly/plotly.js/pull/2483)]
- Add Japanese (`ja`) locale [[2558](https://github.com/plotly/plotly.js/pull/2558)]

Changed
- Multiple performance improvements for cartesian subplots, most noticeable
on graphs with many cartesian subplots [[2474](https://github.com/plotly/plotly.js/pull/2474), [#2487](https://github.com/plotly/plotly.js/pull/2487), [#2527](https://github.com/plotly/plotly.js/pull/2527)]
- Use new `gl-mesh3d` version that attempts to make lighting results less
hardware-dependent [[2365](https://github.com/plotly/plotly.js/pull/2365)]
- New and improved point-clustering algorithm for `scattergl` [[2499](https://github.com/plotly/plotly.js/pull/2499)]
- Improved `regl-line2d` component [[2556](https://github.com/plotly/plotly.js/pull/2556)]

Fixed
- Fix memory leak in `parcoords` traces [[2415](https://github.com/plotly/plotly.js/pull/2415)]
- Fix `scattergl` `selectedpoints` clearance under select/lasso drag modes [[2492](https://github.com/plotly/plotly.js/pull/2492)]
- Fix `scattergl` horizontal lines rendering [[2564](https://github.com/plotly/plotly.js/pull/2564)]
- Fix `scattergl` unselected marker opacity for array marker opacity traces [[2503](https://github.com/plotly/plotly.js/pull/2503)]
- Fix `scattergl` hover over data gaps [[2499](https://github.com/plotly/plotly.js/pull/2499)]
- Fix `ohlc` on category axes [[2561](https://github.com/plotly/plotly.js/pull/2561)]
- Fix inconsistencies in `ohlc` and `candlestick` event data [[2561](https://github.com/plotly/plotly.js/pull/2561)]
- Fix hover `text` for `candlestick` traces [[2561](https://github.com/plotly/plotly.js/pull/2561)]
- Fix `scattermapbox` selections for traces with data gaps [[2513](https://github.com/plotly/plotly.js/pull/2513)]
- Fix `table` border cases that got previously cut off [[2511](https://github.com/plotly/plotly.js/pull/2511)]
- Fix `box` traces with one jittered outlier [[2530](https://github.com/plotly/plotly.js/pull/2530)]
- Fix `cliponfalse: false` on reversed axes [[2533](https://github.com/plotly/plotly.js/pull/2533)]
- Fix buggy `plot_bgcolor` rendering when updating axis `overlaying` attribute [[2516](https://github.com/plotly/plotly.js/pull/2516)]
- Fix buggy `Plotly.react` behavior for `carpet`, `contourcarpet`, `scattercarpet`,
`table` and x/y/z column `heatmap` traces [[2525](https://github.com/plotly/plotly.js/pull/2525)]
- Fix buggy `Plotly.react` behavior for `ohlc` and `candlestick` traces [[2561](https://github.com/plotly/plotly.js/pull/2561)]
- Fix ordered categories on graphs with `visible: false` traces [[2489](https://github.com/plotly/plotly.js/pull/2489)]
- Fix ordered categories in multi-subplot graphs [[2489](https://github.com/plotly/plotly.js/pull/2489)]
- Fix inconsistencies when ordering number and numeric string categories [[2489](https://github.com/plotly/plotly.js/pull/2489)]
- Fix format `days` in English locale [[2490](https://github.com/plotly/plotly.js/pull/2490)]
- Handle HTML links with encoded URIs correctly in svg text labels [[2471](https://github.com/plotly/plotly.js/pull/2471)]

Fixed
- Ping `mapbox-gl` to `0.44.1` so that users on fresh
`npm install` do not get the wrong mapbox-gl version message [[2467](https://github.com/plotly/plotly.js/pull/2467)]
- Fix swapping between `scatter` and `scatter3d` traces and other
potential problems caused by incorrect axis constraints resetting [[2465](https://github.com/plotly/plotly.js/pull/2465)]

Fixed
- Fix `scatterpolar` in dist and CDN bundles
(due to `browser-pack-flat` discrepancy introduced in 1.35.0) [[2458](https://github.com/plotly/plotly.js/pull/2458)]
- Fix removing and adding scatter(gl) as not the first module [[2455](https://github.com/plotly/plotly.js/pull/2455)]
- Ensure we don't draw ticks if there are none to draw [[2454](https://github.com/plotly/plotly.js/pull/2454)]

Added
- Add `automargin` attribute to cartesian axes which auto-expands margins
when ticks, tick labels and/or axis titles do not fit on the graph [[2243](https://github.com/plotly/plotly.js/pull/2243)]
- Add support for typed arrays as data array inputs [[2388](https://github.com/plotly/plotly.js/pull/2388)]
- Add layout `grids` attribute for easy subplot generation [[2399](https://github.com/plotly/plotly.js/pull/2399)]
- Implement `cliponaxis: false` for bar text [[2378](https://github.com/plotly/plotly.js/pull/2378)]
- Add opposite axis attributes for range slider to control y axis range behavior [[2364](https://github.com/plotly/plotly.js/pull/2364)]
- Generalize `hoverdistance` and `spikedistance` for area-like objects [[2379](https://github.com/plotly/plotly.js/pull/2379)]
- Bring `scattergl` auto-range logic to par with SVG `scatter` [[2404](https://github.com/plotly/plotly.js/pull/2404)]
- Add selected/unselected marker color size support to `scattermapbox` traces [[2361](https://github.com/plotly/plotly.js/pull/2361)]

Changed
- Remove all circular dependencies in our `src/` directory [[2429](https://github.com/plotly/plotly.js/pull/2429)]
- Build our CDN bundles with `browser-pack-flat` browserify plugin [[2447](https://github.com/plotly/plotly.js/pull/2447)]
- Bump `mapbox-gl` to `v0.44.0` [[2361](https://github.com/plotly/plotly.js/pull/2361)]
- Bump `glslify` to `v6.1.1` [[2377](https://github.com/plotly/plotly.js/pull/2377)]
- Stop relinking `customdata`, `ids` and any matching objects
in `gd._fullLayout` during `Plots.supplyDefaults` [[2375](https://github.com/plotly/plotly.js/pull/2375)]

Fixed
- Fix buggy auto-range / auto-margin interaction
leading to axis range inconsistencies on redraws
(this bug was mostly noticeable on graphs with legends) [[2437](https://github.com/plotly/plotly.js/pull/2437)]
- Bring back `scattergl` lines under select/lasso `dragmode`
(bug introduced in `1.33.0`) [[2377](https://github.com/plotly/plotly.js/pull/2377)]
- Fix `scattergl` visible toggling for graphs with multiple traces
with different modes (bug introduced in `1.33.0`) [[2442](https://github.com/plotly/plotly.js/pull/2442)]
- Bring back `spikelines` for traces other than `scatter`
(bug introduced in `1.33.0`) [[2379](https://github.com/plotly/plotly.js/pull/2379)]
- Fix `Plotly.Fx.hover` acting on multiple subplots
(bug introduced in `1.32.0`) [[2379](https://github.com/plotly/plotly.js/pull/2379)]
- Fix range slider with stacked y axes positioning
(bug introduced in `1.32.0`) [[2451](https://github.com/plotly/plotly.js/pull/2451)]
- Fix `scattergl` color clustering [[2377](https://github.com/plotly/plotly.js/pull/2377)]
- Fix `Plotly.restyle` for `scattergl` `fill` [[2377](https://github.com/plotly/plotly.js/pull/2377)]
- Fix multi-line y-axis label positioning [[2424](https://github.com/plotly/plotly.js/pull/2424)]
- Fix centered hover labels edge cases [[2440](https://github.com/plotly/plotly.js/pull/2440), [#2445](https://github.com/plotly/plotly.js/pull/2445)]
- Fix hover labels in bar groups in compare mode [[2414](https://github.com/plotly/plotly.js/pull/2414)]
- Fix axes and axis lines removal [[2416](https://github.com/plotly/plotly.js/pull/2416)]
- Fix auto-sizing in `Plotly.react` [[2437](https://github.com/plotly/plotly.js/pull/2437)]
- Fix error bars for `Plotly.react` and uneven data arrays [[2360](https://github.com/plotly/plotly.js/pull/2360)]
- Fix edits for date-string referenced annotations [[2368](https://github.com/plotly/plotly.js/pull/2368)]
- Fix `z` hover labels with exponents [[2422](https://github.com/plotly/plotly.js/pull/2422)]
- Fix yet another histogram edge case [[2413](https://github.com/plotly/plotly.js/pull/2413)]
- Fix fall back for contour labels when there's only one contour [[2411](https://github.com/plotly/plotly.js/pull/2411)]
- Fix `scatterpolar` category angular period calculations [[2449](https://github.com/plotly/plotly.js/pull/2449)]
- Clear select outlines on mapbox zoomstart [[2361](https://github.com/plotly/plotly.js/pull/2361)]
- Fix legend click to causes legend scroll bug [[2426](https://github.com/plotly/plotly.js/pull/2426)]