| Index: polymer_1.0.4/bower_components/iron-meta/README.md
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| +iron-meta
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| +=========
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| +
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| +`iron-meta` is a generic element you can use for sharing information across the DOM tree.
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| +It uses [monostate pattern](http://c2.com/cgi/wiki?MonostatePattern) such that any
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| +instance of iron-meta has access to the shared
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| +information. You can use `iron-meta` to share whatever you want (or create an extension
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| +[like x-meta] for enhancements).
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| +
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| +The `iron-meta` instances containing your actual data can be loaded in an import,
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| +or constructed in any way you see fit. The only requirement is that you create them
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| +before you try to access them.
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| +
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| +Examples:
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| +
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| +If I create an instance like this:
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| +
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| +```html
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| +<iron-meta key="info" value="foo/bar"></iron-meta>
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| +```
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| +
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| +Note that value="foo/bar" is the metadata I've defined. I could define more
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| +attributes or use child nodes to define additional metadata.
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| +
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| +Now I can access that element (and it's metadata) from any iron-meta instance
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| +via the byKey method, e.g.
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| +
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| +```javascript
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| +meta.byKey('info').getAttribute('value');
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| +```
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| +
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| +Pure imperative form would be like:
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| +
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| +```javascript
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| +document.createElement('iron-meta').byKey('info').getAttribute('value');
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| +```
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| +
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| +Or, in a Polymer element, you can include a meta in your template:
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| +
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| +```html
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| +<iron-meta id="meta"></iron-meta>
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| +```
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| +
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| +```javascript
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| +this.$.meta.byKey('info').getAttribute('value');
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| +```
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