从聚合物元素定义中挖掘自定义标签 [英] Digging custom tags out of Polymer element definitions

问题描述

在元素的实现中处理过去的一些遗物，我们遇到了一个障碍，即从外部进入<template>元素以检索特定内容.例如，我们在元素中保留<script id="ceci-definition">，其中包含有关该元素的一些元数据.看起来像这样:

Dealing with some relics of the past in our elements' implementation, we've hit a snag reaching into <template> elements externally to retrieve specific content. For example, we leave a <script id="ceci-definition"> in our elements which contains some meta data about the element. Looks like this:

<polymer-element>
  <template>
    <script id="ceci-definition">{ ... }</script>
  </template>
</polymer-element>

后来，我们尝试使用像这样的丑陋的东西来检索它:

Later, we try to retrieve it using something ugly like this:

window.CustomElements.registry[elementName].prototype.element.impl.querySelector('template').content.querySelector('script#ceci-definition');

我正在将这些定义s移为包围它们的的直接子代，这使得获取该数据变得更加容易.像这样:

I'm in the process of moving those definition s to be direct children of the which encloses them, which makes reaching in for that data much easier. Like this:

<polymer-element>
  <script id="ceci-definition">{ ... }</script>
  <template>
  </template>
</polymer-element>

丑陋的事...

window.CustomElements.registry[elementName].prototype.element.impl.querySelector('script#ceci-definition');

我的问题:有没有一种更清洁的Polymer方法可以触及<polymer-element>标签?

My question: is there a cleaner, Polymer way to reach into the <polymer-element> tag for something?

注意:尽量不要将此元数据放在传递给Polymer()的对象上.

Note: Trying not to place this meta data on the object which is passed to Polymer().

推荐答案

这正是 core-meta 是.

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