rackis-ember-sandbox

blog-post.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

blog-post.template.hbs

<h1>Hello</h1>
a here --->
{{yield (hash ca=(component "comp-a") aVal="Hello aVal") }}
b here ===>
{{yield (hash cb=(component "comp-b") bVal="World bVal") }}
<h1>World</h1>

comp-a.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

comp-a.template.hbs

<h1>Comp A</h1>
{{yield}}

comp-b.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

comp-b.template.hbs

<h1>Comp B</h1>
{{yield}}

controllers.application.js

import Ember from 'ember';

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

//So <h2>Middle</h2> is rendered *twice*, it seems. As near as I can tell, inside of blog-post,

// `{{yield (hash ca=(component "comp-a")) }}`

//means "render all of my children, and set **my own** prop of `ca` to the component
//comp-a. When that happens, `cb` is undefined, which is why the comp-b component doesn't render, there. And the reverse for the other line that sets cb to comp-b

//Coming from a react background it seems crazy that a component can set its own publicly accessible props, so I want to make sure I have that right

templates.application.hbs

{{#blog-post x="Hi" as |post|}}
<h2>Middle</h2>
{{post.aVal}}
{{#post.ca}}
ca child
{{/post.ca}}

{{post.bVal}}
{{#post.cb}}
cb child
{{/post.cb}}
{{/blog-post}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}