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Aliasing Ember properties depending on existence of other properties
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<html> | |
<head> | |
<title>Learnin'</title> | |
<link href="https://cdnjs.cloudflare.com/ajax/libs/normalize/3.0.1/normalize.css" rel="stylesheet"> | |
<style> | |
body { | |
margin: 30px auto; | |
width: 600px; | |
} | |
table { | |
width: 100%; | |
} | |
th, td { | |
text-align: left; | |
padding: 8px; | |
box-sizing: padding-box; | |
} | |
</style> | |
<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> | |
<script src="http://builds.handlebarsjs.com.s3.amazonaws.com/handlebars-v2.0.0.js" type="text/javascript"></script> | |
<script src="http://builds.emberjs.com/tags/v1.9.0/ember.js" type="text/javascript"></script> | |
<script> | |
App = Ember.Application.create(); | |
App.Router.map(function() { | |
}); | |
DasMixin = Ember.Mixin.create({ | |
fsmIsLoading: false, | |
init: function() { | |
if (this.get('isLoading') === undefined) { | |
// alias it | |
this.reopen({ | |
isLoading: Em.computed.reads('fsmIsLoading') | |
}); | |
} else { | |
// leave it | |
} | |
this._super(); | |
} | |
}); | |
App.Model = Ember.Object.extend(DasMixin, { | |
isLoading: false | |
}); | |
App.NonModel = Ember.Object.extend(DasMixin); | |
App.IndexRoute = Ember.Route.extend({ | |
setupController: function(controller) { | |
controller.set('model', App.Model.create()); | |
controller.set('nonModel', App.NonModel.create()); | |
} | |
}); | |
App.IndexController = Ember.Controller.extend({ | |
actions: { | |
toggleModel: function() { | |
this.toggleProperty('model.fsmIsLoading'); | |
}, | |
toggleNonModel: function() { | |
this.toggleProperty('nonModel.fsmIsLoading'); | |
} | |
} | |
}); | |
</script> | |
</head> | |
<body> | |
<script type="text/x-handlebars" data-template-name="application"> | |
{{outlet}} | |
</script> | |
<script type="text/x-handlebars" data-template-name="index"> | |
<h2>App.Model</h2> | |
<p> | |
<code>App.Model</code> is an example of an object that has an existing | |
property which would otherwise conflict with ours. In this case, we | |
leave the conflicting propery alone. Users of our library use the | |
prefixed <code>fsmIsLoading</code> propery. | |
</p> | |
<table> | |
<tbody> | |
<tr> | |
<td><code>fsmIsLoading</code></td> | |
<td>{{model.fsmIsLoading}}</td> | |
<td><button {{action "toggleModel"}}>Toggle</button></td> | |
</tr> | |
<tr> | |
<td><code>isLoading</code></td> | |
<td>{{model.isLoading}}</td> | |
<td></td> | |
</tr> | |
</tbody> | |
</table> | |
<h2>App.NonModel</h2> | |
<p> | |
<code>App.NonModel</code> is an example of an object that does not have | |
any confilcting properties. In this case we can alias to our prefixed | |
property. | |
</p> | |
<table> | |
<tbody> | |
<tr> | |
<td><code>fsmIsLoading</code></td> | |
<td>{{nonModel.fsmIsLoading}}</td> | |
<td><button {{action "toggleNonModel"}}>Toggle</button></td> | |
</tr> | |
<tr> | |
<td><code>isLoading</code></td> | |
<td>{{nonModel.isLoading}}</td> | |
<td></td> | |
</tr> | |
</tbody> | |
</table> | |
</script> | |
</body> | |
</html> |
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