Plugin for integrating Cycle.js components in Piral.

Usage no npm install needed!

<script type="module">
  import piralCycle from 'https://cdn.skypack.dev/piral-cycle';


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Piral Cycle · GitHub License npm version tested with jest Gitter Chat

This is a plugin that only has a peer dependency to piral-core. What piral-cycle brings to the table is a set of Pilet API extensions that can be used with piral or piral-core.

The set includes a Cycle.js converter for any component registration, as well as a fromCycle shortcut and a CycleExtension component.

By default, these API extensions are not integrated in piral, so you'd need to add them to your Piral instance.


The following functions are brought to the Pilet API.


Transforms a standard Cycle.js component into a component that can be used in Piral, essentially wrapping it with a reference to the corresponding converter.


The extension slot component to be used in Cycle.js components.


::: summary: For pilet authors

You can use the fromCycle function from the Pilet API to convert your Cycle.js components to components usable by your Piral instance.

Example use:

import { PiletApi } from '<name-of-piral-instance>';
import { CyclePage } from './CyclePage';

export function setup(piral: PiletApi) {
  piral.registerPage('/sample', piral.fromCycle(CyclePage));

Piral provides two drivers to your Cycle.js component. Here, TProps are properties provided by Piral, e.g. TileComponentProps.

export interface PiralDomDrivers<TProps> extends Drivers {
   * A DOM Driver giving access to the DOM where the component is mounted.
  DOM: Driver<Stream<VNode>, MainDOMSource>;
   * A driver giving access to Piral specific properties passed down to the component.
  props: Driver<void, Stream<TProps>>;

Within Cycle.js components the Piral Cycle.js extension component can be used by referring to CycleExtension, e.g.,

CycleExtension({ name: "name-of-extension" })

Alternatively, if piral-cycle has not been added to the Piral instance you can install and use the package also from a pilet directly.

import { PiletApi } from '<name-of-piral-instance>';
import { fromCycle } from 'piral-cycle/convert';
import { CyclePage } from './CyclePage';

export function setup(piral: PiletApi) {
  piral.registerPage('/sample', fromCycle(CyclePage));


::: summary: For Piral instance developers

Using Cycle.js with Piral is as simple as installing piral-cycle and Cycle.js.

import { createCycleApi } from 'piral-cycle';

The integration looks like:

const instance = createInstance({
  // important part
  plugins: [createCycleApi()],
  // ...

The @cycle/run, @cycle/dom and xstream packages should be shared with the pilets via the package.json:

  "pilets": {
    "externals": [



Piral is released using the MIT license. For more information see the license file.