yield and block parameters concept in components

components.sachin-c.js

import Ember from 'ember';

export default Ember.Component.extend({
  childname:'arjun',
  childage:25,
  actions:{
    changeCname(value){
      console.log('changeCname');
      this.set('cname',value);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  name:'kumkan',
  age:100,
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{#sachin-c cname=name as |child| }}
<div style="background-color:blue;width:100px;height:100px;">
 application {{child.childname}} {{child.childage}} 
</div>
{{/sachin-c}}
<br>
{{outlet}}
<br>
<br>

templates.components.sachin-c.hbs

before yield
{{yield (hash childname=childname childage=childage)}}
sachin-c- {{cname}}{{age}}
after yield
<button {{action (action 'changeCname' 'Kaniya')}}>change-name</button>

twiddle.json

{
  "version": "0.10.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}