bound-subject-decorator

A decorator for reducing boilerplate around using RxJS 5 Subjects in Components (like React or similar)

Installation

npm i -S bound-subject-decorator

Usage

By decorating any property that returns a Subject (or BehaviorSubject, et al) with @boundSubject, it binds the subject instance's next, error and complete methods to the subject instance, so they can be used with less boilerplate in components. This can be used in any framework or environment that might require this behavior.

React.js Basic Example

import * as React from 'react';
import * as Rx from 'rxjs';
import { boundSubject } from 'bound-subject-decorator';
 
class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = { count: 0 };
  }
 
  componentDidMount() {
    this.sub = this.clicks
      .scan(x => x + 1, 0)
      .subscribe(count => this.setState({ count }));
  }
 
  componentWillUnmount() {
    this.sub.unsubscribe();
  }
 
  // convert the `clicks` property to a function-subject!
  @boundSubject
  clicks = new Rx.Subject();
 
  render() {
    // now we can use `{this.clicks.next}` directly as a handler
    return (<div>
      <button onClick={this.clicks.next}>Click Me</button>
      <div>count: {this.state.count}</div>
    </div>);
  }
}