Example pub/sub with Aurelia's EventAggregator

event-aggregator.ts

// the PUB:
import {EventAggregator} from 'aurelia-event-aggregator';

@inject(EventAggregator)
export class YourClass {
    constructor(EventAggregator) {
        this.ea = EventAggregator;
    }

    attached() {
        this.ea.publish('filterApplied', {
        	// pass along an object here...
        	from: new Date(),
        	until: new Date()
        });
    }
}

// the SUB:

import {inject} from 'aurelia-framework';
import {EventAggregator} from 'aurelia-event-aggregator';

@inject(EventAggregator)
export class YourViewModel {
    constructor(EventAggregator) {
        this.ea = EventAggregator;
    }

    attached() {
        this.ea.subscribe('filterApplied', (obj) => {
            console.log('Hoorah!', obj);
        });
    }
}