proppy-extend

Proppy's missing pieces

Install

npm install proppy-extend

It's required to have proppy@^1.2.6 in order to use proppy-extend: npm install proppy.

Setup

Plugins and config

Setup must be done at the beginning of your application entry point, before other files that use proppy-extend are imported. It is required to at least register a connector plugin for your views framework. For now, only the React integration is available, though contributions are welcomed.

index.js

import 'babel-polyfill';
 
import './setup';
 
// ...other imports

Instead of having each plugin published as a different package, all plugins live within the plugins folder. Check the available plugins here.

setup.js

import { config } from 'proppy-extend';
import connector from 'proppy-extend/plugins/react';
 
config.plugin(connector);
config.options({ /* my options object */ });

attach(...middlewares)

• middlewares: Proppy functions.

In order to use proppy-extend functions, you must use the provided attach() instead of the one provided by proppy's framework-specific package.

attach() can also perform composition by itself, so explicit usage of compose (attach(compose(...middlewares))) is unneded.

import React from 'react';
import { attach, intercept } from 'proppy-extend';
import { withProps } from 'proppy';
 
const enhance = attach(
  intercept((props) => !props.ready, () => <div>Component Not Ready</div>),
  withProps({ hello: 'world' })
);
 
export default enhance(MyComponent);

Usage

ensemble(initialState, callback)

Share state between already created single functions.

• initialState: Object.
• callback: Function, taking state. Use state.get() and state.set() to get or set any state property: (state) => proppyFunction.

import { compose, withObservable } from 'proppy'
import { ensemble, intercept } from 'proppy-extend';
 
ensemble(
  { ready: false },
  (state) => compose(
    withObservable((props) => {
      return props.myObservable$.pipe(tap(() => state.set('ready', true)));
    }),
    intercept(() => !state.get('ready'), () => <div>Stream not ready!</div>)
  )
);

withViews(...callbacks)

Manipulates the component view/render to allow for traditional component composition when needed. withViews() will always run last within the proppy flow.

• callbacks: Any number of component returning functions; or strings when previously registered on setup: (Component) => ModifiedComponent.

import React from 'react';
import { attach, withViews } from 'proppy-extend';
 
const getTopComponent = (Component) => (props) => {
  <div>
    <p>This is the top component</p>
    <Component {...props} />
  </div>
};
 
const getInnerComponent = (Component) => (props) => {
  <div>
    <p>This is the inner component</p>
    <Component {...props} />
  </div>
};
 
export default attach(
  withViews(getTopComponent, getInnerComponent)
)(MyComponent);

withViews can also take a string with the view name when previously registered via options on setup:

setup.js

import { observer } from 'mobx-react';
 
// ...
 
config.options({
  views: {
    mobx: observer,
    top: (Component) => (props) => {
      <div>
        <p>This is the top component</p>
        <Component {...props} />
      </div>
    }
  }
});

import { withViews } from 'proppy-extend';
 
withViews('mobx', 'top');

intercept(test, callback)

Similar to withViews(), but will only run if a condition is met, that is, when test returns truthy.

• test: Function, (props) => true
• callback: Function, (Component) => ModifiedComponent

import { intercept } from 'proppy-extend';
 
intercept(
  (props) => !!props.iWantToIntercept,
  (Component) => (props) => <div>I intercepted</div>
);

withProviders()

Merges providers with props.

import { withProviders } from 'proppy-extend';
 
withProviders();

onInit(callback)

Calls callback on initialization.

• callback: Function, (props, providers) => { /* do stuff */ }

import { onInit } from 'proppy-extend';
 
onInit((props) => { /* do stuff */ });

none()

Shorthand for a null function. Useful for conditional usage, particularly with ensemble.

import { none } from 'proppy-extend';
 
none();

withProps(options?, callback)

• options: Object or string, optional.
  • As an object, it can have keys:
    • as: String, it'll pass the observable results as a single property. Default: null.
    • onChange: Boolean, it will not only update when mobx observables fire, but also when parent props change. Default: false.
  • If as a string, it will serve as options.as.
• callback: Function, : (props, providers) => props

import { attach, withProps } from 'proppy-extend';
 
withProps('styles', (props) => ({
  root: {
    fontFamily: props.size,
    width: '100%'
  },
  inner: {
    background: 'red'
  }
}));

Plugins

React

Requires react@^16.5.0 and proppy-react@^1.2.6: npm install react proppy-react.

Allows you to use proppy-extend with react. It must be registered on setup:

setup.js

import { config } from 'proppy-extend';
import connector from 'proppy-extend/plugins/react';
 
config.plugin(connector);

RxJS

Requires rxjs@^6.0.0 and proppy-rx@^1.2.6: npm install rxjs proppy-rx.

It must be registered on setup:

setup.js

import { config } from 'proppy-extend';
import rx from 'proppy-extend/plugins/rx';
 
config.plugin(rx);

withObservable(options?, callback)

• options: Object or string, optional.
  • As an object, it can have keys:
    • as: String, it'll pass the observable results as a single property. Default: null.
    • wait: Boolean, if true, the component won't render until the observable has resolved. Default: true.
    • validate: Object, a JSON schema to validate the result agains. If failed, it will be filtered. Default: null.
  • If as a string, it will serve as options.as.
• callback: Function, called on initialization: (props, providers) => props.myStream$

import { attach, withObservable } from 'proppy-extend';
 
withObservable('item', (props) => props.item$)

withStream(options?, callback)

Same as withObservable() but callback receives an stream of props.

• options: Same as withObservable(), optional.
• callback: Function, called on initialization, (props$, providers) => props$

import { switchMap } from 'rxjs/operators';
import { attach, withStream } from 'proppy-extend';
 
withObservable('item', (props$) => props$.switchMap(
  (props) => props.item$
))

Mobx

Requires mobx@^5.0.0: npm install mobx.

It must be registered on setup:

setup.js

import { config } from 'proppy-extend';
import mobx from 'proppy-extend/plugins/mobx';
 
config.plugin(mobx);

withComputed(options?, callback)

• options: Object or string, optional.
  • As an object, it can have keys:
    • as: String, it'll pass the observable results as a single property. Default: null.
    • onChange: Boolean, it will not only update when mobx observables fire, but also when parent props change. Default: false.
  • If as a string, it will serve as options.as.
• callback: Function, : (props, providers) => providers.store.myObservable

import { attach, withComputed } from 'proppy-extend';
 
withComputed('styles', (_, { store }) => ({
  root: {
    fontFamily: store.theme.fontFamily,
    width: '100%'
  },
  inner: {
    background: store.theme.innerBg
  }
}));