chore: Release v4.0.0-rc.0

CHANGELOG.md

@@ -9,6 +9,54 @@ To see all merged commits on the master branch that will be part of the next plo
 
 where X.Y.Z is the semver of most recent plotly.js release.
 
+## [4.0.0-rc.0] -- 2026-07-21
+
+### Added
+- Add `minscale`, `maxscale` geo plot attributes [[#7371](https://github.com/plotly/plotly.js/pull/7371)], with thanks to @mojoaxel for the contribution!
+- Enable TypeScript compatibility within the library and start exporting types [[#7680](https://github.com/plotly/plotly.js/pull/7680)]
+- Add `quiver` trace type to visualize vector fields using arrows [[#7710](https://github.com/plotly/plotly.js/pull/7710)], with thanks to @degzhaus for the contribution!
+- Use dashed markers in legend for shape traces with dash configured [[#7845](https://github.com/plotly/plotly.js/pull/7845)]
+- Add `sort` option to Sankey links and nodes [[#7873](https://github.com/plotly/plotly.js/pull/7873)], with thanks to @adamreeve for the contribution!
+- Add support for MathJax v4 [[#7898](https://github.com/plotly/plotly.js/pull/7898)]
+
+### Removed
+- **Breaking**: Remove `scattermapbox`, `choroplethmapbox`, `densitymapbox` trace types, the `mapbox` subplot, and the `mapboxAccessToken` config option [[#7860](https://github.com/plotly/plotly.js/pull/7860)]
+  - These traces have been deprecated since v3. Use the equivalent `*map` traces going forward.
+- **Breaking**: Drop support for MathJax v2 [[#7898](https://github.com/plotly/plotly.js/pull/7898)]
+  - MathJax v3 and v4 are now supported in plotly.js
+- Remove config attributes `showLink`, `linkText`, `sendData`, `showSources`, and `showEditInChartStudio`, as well as trace attribute `stream`, since all of these were associated with Chart Studio and are no longer needed [[#7812](https://github.com/plotly/plotly.js/pull/7812)]
+- Remove all `*src` attributes, as well as `layout.hidesources` attribute, from the schema [[#7829](https://github.com/plotly/plotly.js/pull/7829)]
+- Remove internal `trace._fullInput` property and other dead code related to the removed `transforms` feature. No user-facing changes expected [[#7834](https://github.com/plotly/plotly.js/pull/7834)]
+
+### Changed
+- **Breaking**: Switch color processing library from [TinyColor](https://github.com/bgrins/TinyColor) to [color](https://github.com/Qix-/color) [[#7536](https://github.com/plotly/plotly.js/pull/7536)]
+  - `rgb()`/`rgba()` strings with decimal 0–1 fractions are no longer supported
+  - `hsv()` color strings are no longer permitted
+  - Color calculations may differ slightly (by a few RGB units)
+  - New color formats are now supported: '#ff0000aa', '#f00a', 'rgb(255 0 0)', 'rgba(255 0 0 / 0.5)', 'hsl(0 100% 50% / 0.5)', 'hsla(0, 100%, 50%, 0.5)', 'hwb(0, 0%, 0%)' 
+ - **Breaking**: Set default `layout.axis.tickmode` to `'sync'` when axis is overlaying [[#7684](https://github.com/plotly/plotly.js/pull/7684)]
+- **Breaking**: Change `splom.axis.matches` default from `false` to `true` [[#7843](https://github.com/plotly/plotly.js/pull/7843)]
+- **Breaking**: Replace `country-regex` with `country-iso-search` to search for country names in choropleth, scattergeo traces [[#7856](https://github.com/plotly/plotly.js/pull/7856)]
+  - The vast majority of country names are handled exactly the same with the new library; a small number of legacy entries have been removed
+- **Breaking**: Update minimum required Node version to 22 [[#7861](https://github.com/plotly/plotly.js/pull/7861)]
+- **Breaking:** Change `layout.geo.fitbounds` default from `false` to `'locations'` [[#7895](https://github.com/plotly/plotly.js/pull/7895)]
+  - `geo` subplots will now auto-fit the initial view to the trace data 
+  - Set `fitbounds: false` explicitly to opt out
+- Enable `scattermap` icons to render in color, upgrade Maki icons version to 8.2, and standardize scattermap legend icons to circles [[#7825](https://github.com/plotly/plotly.js/pull/7825)]
+- Use plot title as default filename for "Download plot" button [[#7828](https://github.com/plotly/plotly.js/pull/7828)]
+- Change signature of `plots.graphJson()` function to remove `mode` argument [[#7829](https://github.com/plotly/plotly.js/pull/7829)]
+- Upgrade `plotly/d3-sankey` to 0.12.3. [[#7830](https://github.com/plotly/plotly.js/pull/7830)], with thanks to @adamreeve for the contribution!
+- Update `plot_config` to show the "Upload to Cloud" button by default, and set the default server URL to cloud.plotly.com via [[#7909](https://github.com/plotly/plotly.js/pull/7909)]
+
+### Fixed
+- Fix `histogram` autobin size for single-point traces in `overlay` mode on data updates via `Plotly.react` [[#7507](https://github.com/plotly/plotly.js/pull/7507)], with thanks to @Lexachoc for the contribution!
+ - Format tick labels correctly for small numbers in exponential notation [[#7768](https://github.com/plotly/plotly.js/pull/7768)], with thanks to @Hasnaathussain for the contribution!
+- Fix crash when ordering categories by value (e.g. `sum descending`) with `null` coordinates [[#7855](https://github.com/plotly/plotly.js/pull/7855)]
+ - Fix `scattermap`, `densitymap` traces not showing all points by dynamically computing `center`, `zoom` values [[#7884](https://github.com/plotly/plotly.js/pull/7884), [#7913](https://github.com/plotly/plotly.js/pull/7913)], with thanks to @palmerusaf and @DhruvGarg111 for the contributions!
+ - Fix GeoJSON bounding-box computation for `choropleth` and `scattergeo` traces whose geometry crosses the antimeridian [[#7891](https://github.com/plotly/plotly.js/pull/7891)]
+- Snap cartesian axis tick values to multiple of delta so custom `tickformat` (e.g. `"~r"`) no longer shows floating-point artifacts [[#7901](https://github.com/plotly/plotly.js/pull/7901)], with thanks to @arieleli01212 and @kirthi-b for the contribution!
+
+
 ## [3.7.0] -- 2026-07-03
 
 ### Changed

build/plotcss.js

@@ -54,11 +54,12 @@ var rules = {
     "X .plotly-cloud-dialog .plotly-cloud-dialog-box": "box-sizing:border-box;min-width:300px;max-width:420px;padding:20px 24px;background-color:#fff;border:1px solid #e0e2e5;border-radius:4px;box-shadow:0 4px 16px rgba(0,0,0,.25);font-size:13px;color:#2a3f5f;",
     "X .plotly-cloud-dialog .plotly-cloud-dialog-title": "font-size:16px;font-weight:bold;margin-bottom:12px;",
     "X .plotly-cloud-dialog .plotly-cloud-dialog-message": "line-height:1.5;overflow-wrap:break-word;word-wrap:break-word;",
+    "X .plotly-cloud-dialog .plotly-cloud-dialog-message--hostname": "font-weight:bold;",
     "X .plotly-cloud-dialog .plotly-cloud-dialog-buttons": "display:flex;justify-content:flex-end;margin-top:20px;",
     "X .plotly-cloud-dialog .plotly-cloud-dialog-btn": "font-family:inherit;font-size:13px;padding:7px 16px;margin-left:8px;border-radius:3px;border:1px solid rgba(0,0,0,0);cursor:pointer;",
     "X .plotly-cloud-dialog .plotly-cloud-dialog-btn:focus-visible": "outline:2px solid #447adb;outline-offset:1px;",
-    "X .plotly-cloud-dialog .plotly-cloud-dialog-btn--cancel": "background-color:#fff;border-color:#e0e2e5;color:#777;",
-    "X .plotly-cloud-dialog .plotly-cloud-dialog-btn--cancel:hover": "background-color:#f3f3f3;",
+    "X .plotly-cloud-dialog .plotly-cloud-dialog-btn--cancel": "background-color:#f3f3f3;margin-left:auto;color:#777;",
+    "X .plotly-cloud-dialog .plotly-cloud-dialog-btn--cancel:hover": "background-color:#e0e2e5;",
     "X .plotly-cloud-dialog .plotly-cloud-dialog-btn--confirm": "background-color:#447adb;color:#fff;",
     "X .plotly-cloud-dialog .plotly-cloud-dialog-btn--confirm:hover": "background-color:#1d3b84;",
     Y: "font-family:\"Open Sans\",verdana,arial,sans-serif;position:fixed;top:50px;right:20px;z-index:10000;font-size:10pt;max-width:180px;",

dist/README.md

@@ -43,12 +43,12 @@ The main plotly.js bundles weight in at:
 
 | plotly.js | plotly.min.js | plotly.min.js + gzip | plotly-with-meta.js |
 |-----------|---------------|----------------------|---------------------|
-| 10.7 MB | 4.6 MB | 1.4 MB | 11 MB |
+| 8.9 MB | 3.9 MB | 1.2 MB | 9.3 MB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-3.7.0.js
+> https://cdn.plot.ly/plotly-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-3.7.0.min.js
+> https://cdn.plot.ly/plotly-4.0.0-rc.0.min.js
 
 
 #### npm packages
@@ -71,7 +71,7 @@ plotly.js also ships with several _partial_ bundles:
 - [geo](#plotlyjs-geo)
 - [gl3d](#plotlyjs-gl3d)
 - [gl2d](#plotlyjs-gl2d)
-- [mapbox](#plotlyjs-mapbox)
+- [map](#plotlyjs-map)
 - [finance](#plotlyjs-finance)
 - [strict](#plotlyjs-strict)
 
@@ -91,12 +91,12 @@ The `basic` partial bundle contains trace modules `bar`, `pie` and `scatter`.
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 2.7 MB | 1.1 MB | 366.4 kB |
+| 2.7 MB | 1.1 MB | 369.7 kB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-basic-3.7.0.js
+> https://cdn.plot.ly/plotly-basic-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-basic-3.7.0.min.js
+> https://cdn.plot.ly/plotly-basic-4.0.0-rc.0.min.js
 
 
 #### npm packages
@@ -114,12 +114,12 @@ The `cartesian` partial bundle contains trace modules `bar`, `box`, `contour`, `
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 3.4 MB | 1.4 MB | 464.8 kB |
+| 3.4 MB | 1.4 MB | 468.6 kB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-cartesian-3.7.0.js
+> https://cdn.plot.ly/plotly-cartesian-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-cartesian-3.7.0.min.js
+> https://cdn.plot.ly/plotly-cartesian-4.0.0-rc.0.min.js
 
 
 #### npm packages
@@ -137,12 +137,12 @@ The `geo` partial bundle contains trace modules `choropleth`, `scatter` and `sca
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 3 MB | 1.2 MB | 417.4 kB |
+| 3.1 MB | 1.3 MB | 435.1 kB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-geo-3.7.0.js
+> https://cdn.plot.ly/plotly-geo-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-geo-3.7.0.min.js
+> https://cdn.plot.ly/plotly-geo-4.0.0-rc.0.min.js
 
 
 #### npm packages
@@ -160,12 +160,12 @@ The `gl3d` partial bundle contains trace modules `cone`, `isosurface`, `mesh3d`,
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 4.2 MB | 1.6 MB | 529.2 kB |
+| 4.2 MB | 1.6 MB | 532.5 kB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-gl3d-3.7.0.js
+> https://cdn.plot.ly/plotly-gl3d-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-gl3d-3.7.0.min.js
+> https://cdn.plot.ly/plotly-gl3d-4.0.0-rc.0.min.js
 
 
 #### npm packages
@@ -183,12 +183,12 @@ The `gl2d` partial bundle contains trace modules `parcoords`, `scatter`, `scatte
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 3.8 MB | 1.5 MB | 523.1 kB |
+| 3.9 MB | 1.5 MB | 526.5 kB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-gl2d-3.7.0.js
+> https://cdn.plot.ly/plotly-gl2d-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-gl2d-3.7.0.min.js
+> https://cdn.plot.ly/plotly-gl2d-4.0.0-rc.0.min.js
 
 
 #### npm packages
@@ -198,26 +198,26 @@ The `gl2d` partial bundle contains trace modules `parcoords`, `scatter`, `scatte
 
 ---
 
-### plotly.js mapbox
+### plotly.js map
 
-The `mapbox` partial bundle contains trace modules `choroplethmapbox`, `densitymapbox`, `scatter` and `scattermapbox`.
+The `map` partial bundle contains trace modules `choroplethmap`, `densitymap`, `scatter` and `scattermap`.
 
 #### Stats
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 4.5 MB | 1.9 MB | 582.2 kB |
+| 4.2 MB | 2 MB | 632.3 kB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-mapbox-3.7.0.js
+> https://cdn.plot.ly/plotly-map-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-mapbox-3.7.0.min.js
+> https://cdn.plot.ly/plotly-map-4.0.0-rc.0.min.js
 
 
 #### npm packages
-> [plotly.js-mapbox-dist](https://www.npmjs.com/package/plotly.js-mapbox-dist)
+> [plotly.js-map-dist](https://www.npmjs.com/package/plotly.js-map-dist)
 
-> [plotly.js-mapbox-dist-min](https://www.npmjs.com/package/plotly.js-mapbox-dist-min)
+> [plotly.js-map-dist-min](https://www.npmjs.com/package/plotly.js-map-dist-min)
 
 ---
 
@@ -229,12 +229,12 @@ The `finance` partial bundle contains trace modules `bar`, `candlestick`, `funne
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 2.9 MB | 1.2 MB | 400 kB |
+| 2.9 MB | 1.2 MB | 403.5 kB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-finance-3.7.0.js
+> https://cdn.plot.ly/plotly-finance-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-finance-3.7.0.min.js
+> https://cdn.plot.ly/plotly-finance-4.0.0-rc.0.min.js
 
 
 #### npm packages
@@ -246,18 +246,18 @@ The `finance` partial bundle contains trace modules `bar`, `candlestick`, `funne
 
 ### plotly.js strict
 
-The `strict` partial bundle contains trace modules `bar`, `barpolar`, `box`, `candlestick`, `carpet`, `choropleth`, `choroplethmapbox`, `cone`, `contour`, `contourcarpet`, `densitymapbox`, `funnel`, `funnelarea`, `heatmap`, `histogram`, `histogram2d`, `histogram2dcontour`, `icicle`, `image`, `indicator`, `isosurface`, `mesh3d`, `ohlc`, `parcats`, `parcoords`, `pie`, `sankey`, `scatter`, `scattergl`, `scatter3d`, `scattercarpet`, `scattergeo`, `scattermapbox`, `scatterpolar`, `scatterpolargl`, `scattersmith`, `scatterternary`, `splom`, `streamtube`, `sunburst`, `surface`, `table`, `treemap`, `violin`, `volume` and `waterfall`.
+The `strict` partial bundle contains trace modules `bar`, `barpolar`, `box`, `candlestick`, `carpet`, `choropleth`, `choroplethmap`, `cone`, `contour`, `contourcarpet`, `densitymap`, `funnel`, `funnelarea`, `heatmap`, `histogram`, `histogram2d`, `histogram2dcontour`, `icicle`, `image`, `indicator`, `isosurface`, `mesh3d`, `ohlc`, `parcats`, `parcoords`, `pie`, `sankey`, `scatter`, `scattergl`, `scatter3d`, `scattercarpet`, `scattergeo`, `scattermap`, `scatterpolar`, `scatterpolargl`, `scattersmith`, `scatterternary`, `splom`, `streamtube`, `sunburst`, `surface`, `table`, `treemap`, `violin`, `volume` and `waterfall`.
 
 #### Stats
 
 | Raw size | Minified size | Minified + gzip size |
 |------|-----------------|------------------------|
-| 11.5 MB | 5 MB | 1.5 MB |
+| 9.7 MB | 4.2 MB | 1.3 MB |
 
 #### CDN links
-> https://cdn.plot.ly/plotly-strict-3.7.0.js
+> https://cdn.plot.ly/plotly-strict-4.0.0-rc.0.js
 
-> https://cdn.plot.ly/plotly-strict-3.7.0.min.js
+> https://cdn.plot.ly/plotly-strict-4.0.0-rc.0.min.js
 
 
 #### npm packages