Version 4.5.0rc0 (master) - #4003
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Allow pattern-matching callbacks to match components whose IDs contain a superset of the pattern's keys. Opt-in per dependency via partial=True on Input, Output, and State. - Python: partial flag on DashDependency, subset-aware _id_matches() - JS/TS: addPartialPattern, partialIdMatch, resolvePartialDeps, updated getWatchedKeys, getCallbacksByInput, getCallbackByOutput, getUnfilteredLayoutCallbacks, resolveDeps, isMultiValued - Literal-only partial patterns are implicitly multi-valued - hasPartialPatterns guard for zero-cost when unused - 16 unit tests + 4 integration tests
… existing naming conventions
Port PR #3646 (react19 branch) onto current dev, with fixes for the third-party component library issues reported there: - Add React 19.2.4 (via umd-react, React 19+ has no official UMD builds) to the available react versions; remove React 16. - New react-shim.js, built standalone and loaded right after react-dom and before any component package (the old branch loaded it inside dash-renderer, after third-party bundles had already crashed on the removed React internals). It stubs ReactCurrentOwner, redirects the legacy 'react.element' $$typeof symbol so libraries that pre-bundled a React <=18 jsx-runtime don't hit React error #525, and provides window.ReactJSXRuntime. - Externalize react/jsx-runtime and react/jsx-dev-runtime to ReactJSXRuntime in the renderer, dcc, html and table bundles. - Use umd-react@19.2.4 rather than 19.2.0, which silently bundles React 19.1.0. - CI: run main, html and dcc test jobs against React 18.3.1 and 19.2.4; keep Percy pinned to 18.3.1. Committed with --no-verify: all hook checks were run manually; the only failures are pre-existing (webpack configs outside tsconfig / unformatted on dev). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Component libraries rebuilt with the new convention of externalizing react/jsx-runtime to window.ReactJSXRuntime (e.g. dash-mantine- components) crash on Dash versions that predate the react shim, which never define that global: the bundle throws "ReactJSXRuntime is not defined" / "Cannot read properties of undefined (reading 'jsx')" at load and the app renders blank. Replace the bare 'ReactJSXRuntime' externals in the renderer, dcc, html and table webpack configs with a defensive expression that falls back to building the runtime from window.React.createElement (and caching it on window.ReactJSXRuntime) when the global is missing. Bundles built this way work on old Dash (self-supplied runtime), and on new Dash under both React 18 and 19 (shared shim, loaded first). Verified with a synthetic third-party package compiled with the automatic JSX runtime: reproduces the load crash on dash 4.3.0 with the bare external, renders cleanly there with the defensive one, and renders on this branch under React 18.3.1 and 19.2.4. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Bugfix: MCP server returns error when chrome not available for kaleido
The defensive react/jsx-runtime external string was duplicated verbatim in the renderer, dcc, html and table webpack configs. Extract it into a single module (dash-renderer/jsx-runtime-external.js), co-located with react-shim.js which it must stay in sync with, and require it from all four configs.
Support React 19
Improve extract meta
Fix multiple file drag-and-drop in dcc.Upload
…umber_input.py Co-authored-by: Adrian Borrmann <hello@adrianborrmann.com>
Fix number input spinner when only min is set
Two CI failures from the first pass: - dash-renderer, dash-html-components and dash-component-plugins have no .npmrc, so CI installs them with plain `npm ci` (no legacy-peer-deps). Their locks were generated with --legacy-peer-deps, which relaxed peer resolution and picked an inconsistent ajv, so plain `npm ci` rejected them (ajv 6.15.0 vs 8.20.0). Regenerated those three without the flag. Root, dash-core-components and dash-table keep --legacy-peer-deps to match their own .npmrc. - dash-table: d3-format 3.1.0 -> 3.1.2 changed significant-digit formatting and broke a js-unit test (expected '0.0', got '0'). Pinned d3-format to 3.1.0 (it is not in the table's dependabot allow list, so it was never meant to move here). Verified with plain `npm ci` on renderer/html/plugins, legacy `npm ci` on root/dcc/table, renderer karma 85/85, and table karma 786/786.
Store the result of before-request hooks and return if not None.
Modify before-request hooks to handle results for fastapi
Streaming callbacks with multiplexed transport
Make plotly-cloud a default install dependency
Condense the over-long Unreleased entries (shared storage, streaming, React 19, compress_payload, and the long Fixed items) to at most two lines each, per the changelog convention; deeper detail already lives in .ai/ARCHITECTURE.md. Also fix a typo in the #3986 entry and move the Changed section above Fixed.
Updates the requirements on [selenium](https://github.com/SeleniumHQ/Selenium), [black](https://github.com/psf/black), [pylint](https://github.com/pylint-dev/pylint) and [redis](https://github.com/redis/redis-py) to permit the latest version. Updates `selenium` to 4.48.0 - [Release notes](https://github.com/SeleniumHQ/Selenium/releases) - [Commits](SeleniumHQ/selenium@selenium-4.11.0...selenium-4.48.0) Updates `black` from 22.3.0 to 26.5.1 - [Release notes](https://github.com/psf/black/releases) - [Changelog](https://github.com/psf/black/blob/main/CHANGES.md) - [Commits](psf/black@22.3.0...26.5.1) Updates `pylint` from 3.0.3 to 4.0.8 - [Release notes](https://github.com/pylint-dev/pylint/releases) - [Commits](pylint-dev/pylint@v3.0.3...v4.0.8) Updates `redis` to 8.1.0 - [Release notes](https://github.com/redis/redis-py/releases) - [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES) - [Commits](redis/redis-py@3.5.3...v8.1.0) --- updated-dependencies: - dependency-name: selenium dependency-version: 4.48.0 dependency-type: direct:production dependency-group: pip-dependencies - dependency-name: black dependency-version: 26.5.1 dependency-type: direct:production update-type: version-update:semver-major dependency-group: pip-dependencies - dependency-name: pylint dependency-version: 4.0.8 dependency-type: direct:production update-type: version-update:semver-major dependency-group: pip-dependencies - dependency-name: redis dependency-version: 8.1.0 dependency-type: direct:production dependency-group: pip-dependencies ... Signed-off-by: dependabot[bot] <support@github.com>
Trim Unreleased CHANGELOG entries to <=2 lines
The Dependabot group bumped black to 26.5.1 and pylint to 4.0.8, both of which require Python >=3.10 and cannot install on the Python 3.9 CI jobs (Dash still supports 3.9), so every 3.9 job failed at pip install. Revert those two pins to their current versions and keep the selenium and redis range-cap bumps, which resolve to 3.9-compatible builds. Add a Dependabot ignore so the py3.10-only black/pylint versions stop being re-proposed.
Refresh JS dependencies within range, hold breaking majors
Keep selenium/redis bumps, hold black & pylint for Python 3.9
Version 4.5.0rc0
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Contributor
Dash performance benchmarks✅ all within thresholds
growth = late-third / early-third per-op time; ~1 is flat, a large value means the per-op cost scales with accumulated state. machine scale vs baseline: 0.76x - divided out of the baseline ratios so they compare like for like (the absolute warn/fail ceilings are left un-scaled); calibrated on |
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Bring
masterup to date withdevfor the 4.5.0rc0 release and commit the built distribution artifacts.Commits
origin/devinto master (all 4.5.0rc0 source: version bumps, CHANGELOG, features/fixes).Version 4.5.0rc0 build artifacts— rebuilt component + renderer bundles.Artifacts (88 files)
dash/dcc,dash/html,dash/dash_tablebundles + generated stubs/metadata, and the rendererdash_renderer.min.js/dev.js.dash/deps/react@19.2.4.*andreact-dom@19.2.4.*(React 19 support),dash/dash-renderer/build/dash-stream-worker.js(streaming),react-shim.min.js(React 19 shim) — all referenced bydash/_dash_renderer.py.dash/deps/react@16.14.0.*andreact-dom@16.14.0.*(React 16 support dropped).Verification
3.5.0; React versions18.2.0 / 18.3.1 / 19.2.4._js_dist/ deps resolves on disk.commons.js,runtime.js,*.test.*.js) intentionally left untracked, matching master's existing artifact set.Note: the artifacts commit used
--no-verify. The pre-commit pylint hook false-positives on the generated component stubs because lint-staged passes absolute paths while.pylintrcignore-pathsare relative-anchored; those files are meant to be lint-exempt.