了解聚合物事件和带有嵌套元素的数据绑定？

Question

I have three nested polymer elements. 我有三个嵌套的聚合物元素。 Each of them has default values, which may be overridden with published value. 它们每个都有默认值，这些默认值可能会被发布的值覆盖。

But i can't do it. 但是我做不到。

On create event does not exist published value. create事件不存在已发布的值。 On ready event child element has already ready and not updated. 在ready事件中，子元素已ready ，尚未更新。

I made example js-bin. 我做了示例js-bin。

In reality, each element in the separate file. 实际上，每个元素都在单独的文件中。 It is example. 这是一个例子。

Object.assign - es6 method for merging objects (use es6-shim). Object.assign-合并对象的es6方法（使用es6-shim）。

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Bin</title>
  <script src="//cdnjs.cloudflare.com/ajax/libs/es6-shim/0.18.0/es6-shim.js"></script>
  <script src="http://www.polymer-project.org/components/platform/platform.js"></script>
  <link href="http://www.polymer-project.org/components/polymer/polymer.html" rel="import"> 
</head>
<body unresolved>

  <polymer-element name="my-field" attributes="ask">
  <template>
    <span><content></content> Message: {{message}}</span>
  </template>
  <script>
    (function() {
      Polymer('my-field', {
        defaultAsk: { message: "Hello from Field!" },
        created: function() {
          console.log('created-field', this.ask, this.message);  
          Object.assign(this, this.defaultAsk);
        },
        ready: function() {
          console.log('ready-field', this.ask, this.message);
          Object.assign(this, this.ask);
        }
      });
    })();
  </script>
  </polymer-element>

  <polymer-element name="my-shelf" attributes="ask">
  <template>
    <my-field ask="{{field}}"><content></content></my-field>
  </template>
  <script>
    (function() {
      Polymer('my-shelf', {
        defaultAsk: { field: { message: "Hello from Shelf!" } },
        created: function() {
          console.log('created-shelf', this.ask, this.field);  
          Object.assign(this, this.defaultAsk);
        },
        ready: function() {
          console.log('ready-shelf', this.ask, this.field);
          Object.assign(this, this.ask);
        }
      });
    })();
  </script>
  </polymer-element>

  <polymer-element name="my-cabinet">
  <template>
    <my-shelf ask="{{shelf}}"><content></content></my-shelf>        
  </template>   
  <script>
    (function() {
      Polymer('my-cabinet', {
        ask:        { shelf: { field: { message: "Hello from outside!" } } },
        defaultAsk: { shelf: { field: { message: "Hello from Cabinet!" } } },
        created: function() {
          console.log('created-cabinet', this.ask, this.shelf);  
          Object.assign(this, this.defaultAsk);
        },
        ready: function() {
          console.log('ready-cabinet', this.ask, this.shelf);
          Object.assign(this, this.ask);
        }
      });
    })();
  </script>
  </polymer-element>

  <my-cabinet>Yo!</my-cabinet>

</body>
</html>

Answer 1

All will working as I want, if use only one object through many nested elements. 如果仅通过多个嵌套元素使用一个对象 ，那么一切都会按我的意愿工作。

Example on js-bin js-bin上的示例

All my element extended of other one (my-elem) only for remove doubled code and make my example more readable. 我所有其他元素的扩展（my-elem）仅用于删除加倍的代码并使我的示例更具可读性。 ask - binding data (from my-cabinet to my-field). ask绑定数据（从my-cabinet到my-field）。 Click - changing data. Click -更改数据。

Unfortunately, on jsbin wery uneasy console for view fired messages. 不幸的是，在jsbin上，wery不方便的控制台用于查看触发的消息。

I made small schema of chain events with nested elements. 我用嵌套元素制作了链式事件的小模式。 Maybe, it will help someone. 也许会帮助某人。

在此处输入图片说明

ps Don't kick me for my bad english. ps不要因为我的英语不好而踢我。

了解聚合物事件和带有嵌套元素的数据绑定？

问题描述

1 个解决方案

解决方案1
1 2014-09-30 18:46:36

了解聚合物事件和带有嵌套元素的数据绑定？

问题描述

1 个解决方案

解决方案1 1 2014-09-30 18:46:36

解决方案1
1 2014-09-30 18:46:36