withEventBus function

The withEventBus function extends a component and makes working with an event bus easier in component methods.

// import it with all other features
import { createCustomElement, withEventBus } from 'https://cdn.skypack.dev/ficusjs@6'

// alternatively, import the function directly
// import { withEventBus } from 'https://cdn.skypack.dev/ficusjs@6/with-event-bus'

// import the renderer and html tagged template literal from the uhtml renderer
import { html, renderer } from 'https://cdn.skypack.dev/@ficusjs/renderers@5/uhtml'

// import an event bus from a local file
import { eventBus } from './event-bus.js'

createCustomElement(
'my-component',
withEventBus(eventBus, {
renderer,
buttonClicked () {
this.eventBus.publish('increment', undefined)
},
render () {
return html`<button type="button" onclick=${this.buttonClicked}>Increment</button>`
}
})
)

The withEventBus function provides a this.eventBus property within the component.
It handles automatic event bus subscription based on the component lifecycle hooks.

setEventBus method

The setEventBus method can be called when an instance needs to be set after the component has initialised.
The method accepts an eventBus argument which is a single event instance.

{
someMethod () {
const eventBus = getEventBus()
this.setEventBus(eventBus)
}
}