classNames / classNameBindings

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNameBindings: ['colorBoolInternal:purple'],
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

helpers.array.js

import Ember from 'ember';

export function array(params/*, hash*/) {
  return params;
}

export default Ember.Helper.helper(array);

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.red {
  color: red;
}

.blue {
  color: blue;
}

.purple {
  color: purple;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>

<label>
  {{input type="checkbox" checked=colorBool}}
  colorBool
</label>

{{my-component}}


{{! these two seem to be identical }}
{{my-component classBinding      = "colorBool:red:blue"}}
{{my-component classNameBindings = "colorBool:red:blue"}}
{{my-component class=(if colorBool "red" "blue")}}

{{! these two seem to be broken (because `params` is frozen in helper?) }}
{{my-component classNameBindings=(array "colorBool:red:blue")}}
{{my-component classNameBindings=(array "colorBool:red:blue") colorBool=colorBool}}

{{! this also works }}
{{my-component colorBoolInternal=true}}

templates.components.my-component.hbs

my-component

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}