Evix library

A simpler way to work with stores events and react.

Use event constructor as the Store and avoid reducers and renders overhead.

Share and access eventStores easily while keeping full compatibility with Redux and Mobx.

Examples - https://github.com/howtoclient/react-evix

Table of Contents

• Installation
• Integration
• Using Evix
  • Configuring Your Events
  • Accessing your event State
  • Dispatching Events
  • Updating Event State
  • Ok Now What?
  • Adding Event Listener Directly
  • Whats An EventComponent
  • Using Event Component
  • Automatically Updating Event Component
• DOCS
  • EventListener
  • Event
  • EventComponent

Installation

    npm i react-evix --save

Integration

    import Evix,{Event,EventComponent} from 'react-evix';

Using Evix

I tried my best to make this library as automatic to use as possible and as fast as i can make it. However to use this out of the box you still need to know a few things :

Configuring Your Events

To create you own event store simply extend Event and add a static default store configuration

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyEvent extends Event{
        static defaultEventState={
            myStateVariable : 0
        }
    }

That's it! there is nothing more to do but use :) And here is how:

Accessing Your Event State

    import MyEvent from './events/MyEvent'; //or wherever you placed it

    const eventState = MyEvent.eventState;

*Note that returned event state is a shallow clone of the original event State

Dispatching Events

Dispatching events is simple, create new extended Event with new state, same as you would using React.setState() and run .dispatch()

    import MyEvent from './events/MyEvent'; //or wherever you placed it

    (new MyEvent(
        {
            myStateVariable : 1
            myNewStateVariable : 123
        },
        {
            payload:"payload"
        }
    ).dispatch();

The new MyEvent.eventState will be

    {
        myStateVariable : 1
        myNewStateVariable : 123
    }

*Note Works the same way React.setState does. Extends the existing eventState with the new data. The new MyEvent.payload will be

    {
        payload:"payload"
    }

Updating Event State

You cant manually update .eventState, that would trigger no events and things will go out of sync. Use .dispatch() instead as described above

Ok Now What

well after you configured your events and know how to dispatch things you probably want to know what to do with this. If you ever worked with any type of events the following should be very familiar :) If you have never worked with events here is a simple explanation:

    Events dispatched(fired/initiated) will be caught by event listeners(observers) that will run an action(function) in responce :)

Adding Event Listener Directly

You can always add an event listeners directly through your extend event constructor using .addEventListener and it will even return you an EventListener

    import MyEvent from './events/MyEvent'; //or wherever you placed it

    const myEventListener = MyEvent.addEventListener( (event) => {
        do the thing!
    })

This is not advised when working with react cause EventComponent exists. You can then Remove or Suspend your event handler whenever you want

    import MyEvent from './events/MyEvent'; //or wherever you placed it
    const myEventListener = MyEvent.addEventListener( (event) => {
        do the thing!
    });

    myEventListener.filter('bread'); // will only trigger if (new MyEvent()).dispatch('bread') is fired
    myEventListener.unFilter(); // removed all filters
    myEventListener.unFilter('bread'); // removes only the specified filter
    myEventListener.suspend(); // Puts the event handler to 'sleep' mode.
    myEventListener.restore(); // Wakes the event handler to catch all dem events!
    myEventListener.remove();  // Removes the event handler completly (cant be restored)

You can also run removal of EventListener by passing them to .removeEventListener

    import MyEvent from './events/MyEvent'; //or wherever you placed it
    const myEventListener = MyEvent.addEventListener( (event) => {
        do the thing!
    });

    MyEvent.removeEventListener(myEventListener);

*this will simply run .remove() on the EventListener :)

Whats An EventComponent

Well it would be a mess if i just used .addEventListener on the extended Event so i created EventComponent Its a React.Component extension with added event related functions: First here is how you create EventComponent

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyComponent extends EventComponent{
        render(){
            return (
                <div />
            );
        }
    }

Simply import and extend, EventComponent is a valid React.Component in all aspects, hell you can even use it with Redux if you wanted to

Using Event Component

So the things i added: this.addEventListener(event, handler, suspendOnUnMount = false) Receives:

• extended Event instance or constructor ( doesn't matter )
• a handler function
• optional: auto-suspend when component un-mounts flag ( oh yes :) ) Returns:
• EventListener instance.

Example:

    import Evix,{Event,EventComponent} from 'react-evix';
    import MyEvent from './events/MyEvent'; //or wherever you placed it

    export default class MyComponent extends EventComponent{
        static myEventListener;
        componentDidMount(){
            this.myEventListener =
                this.addEventListener(
                    MyEvent ,
                    (event) => {
                        do the thing!
                        //event.payload is a way to access the payload :)
                    },
                    true );
        }
        render(){
            return (
                <div />
            );
        }
    }

this.removeEventListener(Mixed) As it sounds, removed a specific event or a whole group of them by type. Receives:

• instance of EventListener OR instance of extended Event OR extended Event constructor Example:

    import Evix,{Event,EventComponent} from 'react-evix';
    import MyEvent from './events/MyEvent'; //or wherever you placed it

    export default class MyComponent extends EventComponent{

        removeSingleEvent(){
           this.removeEventListener(this.myEventListener);
        }

        removeComponentAssignEventsOfType(){
           this.removeEventListener(myEventListener);
        }

        //if another instance of this component exists its events will NOT BE REMOVED

        render(){
            return (
                <div />
            );
        }
    }

*NOTE: All the event functions are Instance controlled so you cant remove events from other Instances( use EventListener.remove() )

Automatically Updating Event Component

I did like the ability of components to reRender if the Store was updated.To address this i created tracker functions that will do exactly that but easier to use.

this.trackEventState(event) - adds eventState tracker to that event type and runs forceUpdate when the eventState is updated Receives:

• extended Event instance or constructor ( doesn't matter )

Example:

    import Evix,{Event,EventComponent} from 'react-evix';
    import MyEvent from './events/MyEvent'; //or wherever you placed it

    export default class MyComponent extends EventComponent{
        static myEventListener;
        componentDidMount(){
            this.trackEventState( MyEvent )
        }
        render(){
            return (
                <div />
            );
        }
    }

*NOTE: the trackers call .forceUpdate on current component but automatically suspended when component is not mounted

this.trackEventState(event) - removes passed event eventState tracker Receives:

• extended Event instance or constructor ( doesn't matter )

Example:

    import Evix,{Event,EventComponent} from 'react-evix';
    import MyEvent from './events/MyEvent'; //or wherever you placed it

    export default class MyComponent extends EventComponent{
        static myEventListener;
        componentDidMount(){
            this.unTrackEventState( MyEvent )
        }
        render(){
            return (
                <div />
            );
        }
    }

this.unTrackAll() - removes ALL eventState trackers Example:

    import Evix,{Event,EventComponent} from 'react-evix';
    import MyEvent from './events/MyEvent'; //or wherever you placed it

    export default class MyComponent extends EventComponent{
        static myEventListener;
        resetOrCleanupThisComponent(){
            this.unTrackAll()
        }
        render(){
            return (
                <div />
            );
        }
    }

*NOTE: should probably never be used... still a nice to have feature :)

DOCS

We all love a good simple whats where and why guide

EventListener

After you subscribe to event dispatcher using one of the addEventListeners you will get EventListener

• EventListener.suspend() - pause event listener without removing it
• EventListener.restore() - resume existing event listener
• EventListener.remove() - remove event listener
• EventListener.filter(string/array) - add filtering for this event listener
• EventListener.unFilter(string/array) - remove filtering for this event listener
• EventListener.isSuspended() - returns event listener activity status
• EventListener.isRemoved() - returns event listener activity status
• EventListener.onAction() - empty function called when .suspend() or .restore() or .remove() are called ( mainly for debugging )

Event

Event (not to be confused with window.Event) is my take on Event with internal SHARED state per extension Usage:

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyEvent extends Event{
        static defaultEventState={
            myStateVariable : 0
        }
    }

    (new MyEvent({myStateVariable : 2})).dispatch();
    console.log(MyEvent.eventState);
    MyEvent.addEventListener

variables:

• .defaultEventState - {Object} - like it sounds, default event state object ( original ) MyEvent.defaultEventState
• .eventState - {Object} - copy of internal eventState MyEvent.eventState
• .eventData - {Object} - data passed to dispatch (only valid after creation ex:(new MyEvent({eventData}).eventData)
• .uid - {String} - unique ID of the event type MyEvent.uid or (new MyEvent()).uid)

methods:

• .dispatch(type) - dispatches with [type]*optional current event and updated the shared eventState

    const fireEvent = (eventData)=>{
        //will trigger all unfiltered events
        (new MyEvent({eventData})).dispatch()
    }
    OR
    const fireEvent = (eventData)=>{
            //will trigger all unfiltered events and filtered by 'bread'
            (new MyEvent({eventData})).dispatch("bread")
    }

• addEventListener(function(){}) - creates event listener with given handler ( function ) and returns EventListener Instance

    const eventListener = MyEvent.addEventListener( (event) => {
        do the thing!
    });

*NOTE use EventComponent instead!

• onEventStateUpdated(function(){}) - - creates on eventState updated listener with given handler ( function ) and returns EventListener Instance

    const stateEventListener = MyEvent.onEventStateUpdated( (event) => {
            do the thing!
        });

*NOTE use EventComponent instead!

• removeEventListener(EventListener) - received EventListener instance and runs .remove() on it

    const clearEvent = (eventListener)=>{
        MyEvent.removeEventListener(eventListener)
    }

• clearAllDirectEvents() - removed all event listeners registered with Event.addEventListener ONLY ( events registered with EventComponent) will not be affected

    const cleanUp = ()=>{
        MyEvent.clearAllDirectEvents()
    }

EventComponent

Extended React.Component to add/remove/suspend and auto suspend/restore event listeners and track eventState changes

Usage:

    import Evix,{Event,EventComponent} from 'react-evix';
    import MyEvent from './events/MyEvent'; //or wherever you placed it

    export default class MyComponent extends EventComponent{
        static trackEvents = [
            MyEvent
        ]
        render(){
            return (<div />);
        }
    }

static trackEvents - an array that will be used to initiate .trackEvent inside the constructor, can be done manually but this is cleaner code :) methods:

• addEventListener(extended Event , function , autoSuspend) - adds event listener under current EventComponent Instance Receives:
  • extended Event instance or constructor of Event ( doesn't matter )
  • a handler function
  • optional: auto-suspend when component un-mounts flag ( oh yes :) ) Returns EventListener instance

Usage:

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyComponent extends EventComponent{
        static myEventListener
        componentDidMount(){
            this.myEventListener = this.addEventListener( MyEvent , (event) => {
                            do the thing!
                        }, true );
            }
        render(){
            return (<div />);
        }
    }

• removeEventListener(mixed) - As it sounds, removed a specific event or a whole group of them by type. Receives:
  • instance of EventListener OR instance of extended Event OR extended Event constructor

Usage:

    import Evix,{Event,EventComponent} from 'react-evix';
    import MyEvent from './events/MyEvent'; //or wherever you placed it

    export default class MyComponent extends EventComponent{

        removeSingleEvent(){
            this.removeEventListener(this.myEventListener);
        }

        removeComponentAssignEventsOfType(){
            this.removeEventListener(myEventListener);
        }

        //if another instance of this component exists its events will NOT BE REMOVED

        render(){
            return ( <div /> );
        }
    }

*NOTE: All the event functions are Instance controlled so you cant remove events from other Instances( use EventListener.remove() )

• onEventStateUpdated(extended Event , function , autoSuspend) - adds event listener under current EventComponent Instance that will only be fired IF eventState actually changes Receives:
  • extended Event instance or constructor of Event( doesn't matter )
  • a handler function
  • optional: auto-suspend when component un-mounts flag ( oh yes :) ) Returns EventListener instance

Usage:

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyComponent extends EventComponent{
        static myEventListener
        componentDidMount(){
            this.myEventListener = this.onEventStateUpdated( MyEvent , (event) => {
                            do the thing!
                        }, true );
            }
        render(){
            return (<div />);
        }
    }

• trackEventState(extended Event) - adds .eventState update listener to current EventComponent Instance that will run .forceUpdate(). Automatically suspended when component is not mounted and restored when it is mounted. Receives:
  • extended Event instance or constructor of Event( doesn't matter )

Usage:

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyComponent extends EventComponent{
        componentDidMount(){
            this.trackEventState( MyEvent );
        }
        render(){
            return (<div />);
        }
    }

• unTrackEventState(extended Event) - removes .eventState update listener from current EventComponent Instance. Receives:
  • extended Event instance or constructor of Event( doesn't matter )

Usage:

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyComponent extends EventComponent{
        componentDidMount(){
            this.unTrackEventState( MyEvent );
        }
        render(){
            return (<div />);
        }
    }

• unTrackAll() - removes ALL .eventState update listeners from current EventComponent Instance.

Usage:

    import Evix,{Event,EventComponent} from 'react-evix';

    export default class MyComponent extends EventComponent{
        cleanOrResetThisComponentBeforeRemoval(){
            this.unTrackAll();
        }
        render(){
            return (<div />);
        }
    }