# Plotly.js v4.0.0-rc.0 is here **URL:** \ **Category:** plotly.js\ **Created:** [July 22, 2026, 1:35pm UTC](https://community.plotly.com/t/plotly-js-v4-0-0-rc-0-is-here/97308 "2026-07-22T13:35:00Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![adamschroeder](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/adamschroeder/32/17280_2.png) [@adamschroeder](https://community.plotly.com/u/adamschroeder)\ **Post date:** [July 22, 2026, 1:35pm UTC](https://community.plotly.com/t/plotly-js-v4-0-0-rc-0-is-here/97308/1 "2026-07-22T13:35:00Z")
Hey all, Plotly.js v4.0.0-rc.0 has been released ([GitHub](https://github.com/plotly/plotly.js/releases/tag/v4.0.0-rc.0), [NPM](https://www.npmjs.com/package/plotly.js/v/4.0.0-rc.0), and the [CDN](https://cdn.plot.ly/plotly-4.0.0-rc.0.js)). Please check it out and let us know if there is anything we missed. ## Added - Add `minscale`, `maxscale` geo plot attributes [[#7371](https://github.com/plotly/plotly.js/pull/7371)] - 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)] - 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)] - 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)] - Update `plot_config` to show the “Upload to Cloud” button by default, and set the default server URL to [cloud.plotly.com](http://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)] - Format tick labels correctly for small numbers in exponential notation [[#7768](https://github.com/plotly/plotly.js/pull/7768)] - 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)] - 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)]