# vega-dataflow

> Reactive dataflow processing.

Latest version **6.1.3** (published 2026-08-14) · BSD-3-Clause license · 0 weekly downloads

## Install

```sh
npm install vega-dataflow
pnpm add vega-dataflow
yarn add vega-dataflow
bun add vega-dataflow
```

## Health

**Score 60/100 (C)** — status: active.

Positive: esm support; no vulnerabilities; recently updated; high maintenance score.

Warnings: low downloads; no types.

## Facts

| | |
|---|---|
| Version | 6.1.3 |
| Published | 2026-08-14 |
| First published | 2015-07-12 |
| Weekly downloads | 0 |
| License | BSD-3-Clause |
| TypeScript types | none |
| Module format | ESM |
| Dependencies | 3 |
| Unpacked size | 263 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Author | Vega |
| Maintainers | domoritz, hydrosquall, jheer, arvindsatya1, lhermann |
| Keywords | vega, dataflow, reactive, streaming, data |

## Links

- npm: https://www.npmjs.com/package/vega-dataflow
- Repository: https://github.com/vega/vega
- Homepage: https://github.com/vega/vega/tree/main/packages/vega-dataflow#readme
- Issues: https://github.com/vega/vega/issues
- npm.io page: https://npm.io/package/vega-dataflow

## Dependencies (3)

- [vega-util](https://npm.io/package/vega-util.md) ^2.1.3
- [vega-format](https://npm.io/package/vega-format.md) ^2.1.3
- [vega-loader](https://npm.io/package/vega-loader.md) ^5.1.3

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## Recent versions

- 6.1.3 (latest) — 2026-08-14
- 5.7.8 (v1-maintenance) — 2025-10-24
- 6.1.2 — 2026-07-22
- 6.1.1 — 2026-07-21
- 6.1.0 — 2025-09-16
- 6.0.0 — 2025-03-27
- 5.7.7 — 2025-01-24
- 5.7.6 — 2024-06-14
- 5.7.5 — 2023-03-01
- 5.7.4 — 2021-03-29
- 5.7.3 — 2020-09-23
- 5.7.2 — 2020-08-31
- 5.7.1 — 2020-08-18
- 5.7.0 — 2020-06-02
- 5.6.0 — 2020-05-15
- … 90 more at https://npm.io/package/vega-dataflow/versions

## README

# vega-dataflow

Reactive dataflow processing.

Defines a reactive dataflow graph that can process both scalar values and streaming relational data. A central `Dataflow` instance manages and schedules a collection of `Operator` instances, each of which is a node in a dataflow graph. Each operator maintains a local state *value*, and may also process streaming data objects (or *tuples*) passing through. Operators may depend on a set of named `Parameters`, which can either be fixed values or live references to other operator values.

Upon modifications to operator parameters or input data, changes are propagated through the graph in topological order. `Pulse` objects propagate from operators to their dependencies, and carry queues of added, removed and/or modified tuples.

This module contains only the core reactive dataflow processing engine. Other modules provide a library of `Operator` types for data stream query processing, including data generation, sampling, filtering, binning, aggregation, cross-stream lookup, visual encoding, and spatial layout.

For more information about data stream transforms, see the [Vega transform documentation](https://vega.github.io/vega/docs/transforms/).

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_Source: https://npm.io/package/vega-dataflow · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._