toStreamFromEvent

function

Creates a stream on a {Observable} object that gets updated whenever the event occurs on the observable object.

`canStream.toStreamFromEvent( obs, eventName )`

Creates a stream based on property value change on observable

var canStream = require('can-stream');
var compute = require('can-compute');
var DefineMap = require('can-define/map/map');
var DefineList = require('can-define/list/list');

var MyMap = DefineMap.extend({
    tasks: {
        Type: DefineList.List,
        value: []
    }
});
var map = new MyMap();

var stream = canStream.toStreamFromEvent(map, 'tasks');

stream.onValue(function(ev){
    console.log('map.tasks has been updated');
});

map.fooList.push('New task');

Parameters

An {Observable}:
observable object
property {String}:
name

Returns

{Stream}:

A Kefir stream.

`canStream.toStreamFromEvent( obs, propName, eventName )`

Creates a stream based on event trigger on observable property

var canStream = require('can-stream');
var compute = require('can-compute');
var DefineMap = require('can-define/map/map');
var DefineList = require('can-define/list/list');

var MyMap = DefineMap.extend({
    tasks: {
        Type: DefineList.List,
        value: []
    }
});
var map = new MyMap();

var stream = canStream.toStreamFromEvent(map, 'tasks', 'length');

stream.onValue(function(ev){
    console.log('map.tasks has been updated');
});

map.fooList.push('New task');

Parameters

An {Observable}:
observable object
observable {String}:
property name
observable {String}:
event name

Returns

{Stream}:

A Kefir stream.