隐式类型转换

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  a: 12,
  
  b: 34,
  
  result: null,
  
  actions: {
    addNumbers(a, b) {
      this.set('result', a + b);
    }
  }
});

templates.application.hbs

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

直接点求和，然后改变一下数字再求和，对比一下两次的结果：

{{input type="number" value=a}}

{{input type="number" value=b}}

<button type="button" onclick={{action "addNumbers" a b}}>求和</button>

{{result}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}