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5.5.2 • Public • Published


End-to-end application state management framework.

Add Jinaga.JS to a client app and point it at a Replicator. Updates are sent to the Replicator as the user works with the app. Any changes that the app needs are pulled from the Replicator.


Install Jinaga.JS from the NPM package.

npm i jinaga

This installs just the client side components. See jinaga.com for details on how to use them.

Running a Replicator

A Jinaga front end connects to a device called a Replicator. The Jinaga Replicator is a single machine in a network. It stores and shares facts. To get started, create a Replicator of your very own using Docker.

docker pull jinaga/jinaga-replicator
docker run --name my-replicator -p8080:8080 jinaga/jinaga-replicator

This creates and starts a new container called my-replicator. The container is listening at port 8080 for commands. Configure Jinaga to use the replicator:

import { JinagaBrowser } from "jinaga";

export const j = JinagaBrowser.create({
  httpEndpoint: "http://localhost:8080/jinaga"

Breaking Changes

If you are upgrading from an older version, you may need to update your code.

Changes in version 4.0.0

In version 4.0.0, the server side code has been moved to a separate package. This allows you to build a client using Create React App and connect it to a Replicator.

When upgrading, take the following steps:

  • Install the jinaga-server package.
  • Remove the 'jinaga' alias from 'webpack.config.js'.
  • Import JinagaServer from 'jinaga-server'.
  • Rename any references of Specification<T> to SpecificationOf<T>, and Condition<T> to ConditionOf<T>. These are used as return types of specification functions. It is uncommon to be explicit about them.

Changes in version 3.1.0

The name of the client-side script changed from jinaga.js to jinaga-client.js. In webpack.config.js, update the jinaga alias from jinaga/dist/jinaga to jinaga/dist/jinaga-client.

Changes in version 3.0.0

In version 3 of Jinaga.JS, the has function takes two parameters. The second is the name of the predecessor type. In version 2, the function took only one parameter: the field name.

To upgrade, change this:

function assignmentUser(assignment) {
  return j.match(assignment.user);

To this:

function assignmentUser(assignment) {
  ensure(assignment).has("user", "Jinaga.User");
  return j.match(assignment.user);


To build Jinaga.JS, you will need Node 16.

npm ci
npm run build
npm test


To release a new version of Jinaga.JS, bump the version number, create and push a tag, and create a release. The GitHub Actions workflow will build and publish the package.

git c main
git pull
npm version patch
git push --follow-tags
gh release create v$(node -p "require('./package.json').version") --generate-notes --verify-tag

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npm i jinaga



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  • michaellperry