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ampersand-wildemitter-datatype-mixin

v1.0.1

Published

WildEmitter datatype for Ampersand state

Downloads

3

Readme

ampersand-wildemitter-datatype-mixin

A mixin for linking WildEmitter objects with Ampersand-State so that they can be bound by Ampersand-View.

Requires that the WildEmitter object emits events with this format:

emitter.emit('change:PROPERTY', emitter, 'VALUE');

It must also make the PROPERTY value an accessible attribute in order for things like view bindings to work:

emitter.foo = 'new-foo';
emitter.emit('change:foo', emitter, emitter.foo);

Install

$ npm install ampersand-wildemitter-datatype-mixin

Example

var State = require('ampersand-state');
var WildEmitterMixin = require('ampersand-wildemitter-datatype-mixin');

var StateWithWildEmitter = State.extend(wildemitterMixin, {
    props: {
        wild: 'wildemitter',
    },
    derived: {
        bar: {
            deps: ['wild.foo'],
            cache: false,
            fn: function () {
                return 'it works!';
            }
        }
    }
});

var ex = new StateWithWildEmitter();
ex.wild = new WildEmitter();

ex.on('change:bar', function () {
  console.log(ex.bar);
});

ex.wild.emit('change:foo', ex.wild, 'newfoo');
// -> it works!

License

MIT