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2 <!--- | |
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5 iron-dropdown.html | |
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13 --> | |
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15 [](https://travis-ci.org/PolymerElements/iron-dropdown) | |
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17 _[Demo and API docs](https://elements.polymer-project.org/elements/iron-dropdown
)_ | |
18 | |
19 | |
20 ##<iron-dropdown> | |
21 | |
22 `<iron-dropdown>` is a generalized element that is useful when you have | |
23 hidden content (`.dropdown-content`) that is revealed due to some change in | |
24 state that should cause it to do so. | |
25 | |
26 Note that this is a low-level element intended to be used as part of other | |
27 composite elements that cause dropdowns to be revealed. | |
28 | |
29 Examples of elements that might be implemented using an `iron-dropdown` | |
30 include comboboxes, menubuttons, selects. The list goes on. | |
31 | |
32 The `<iron-dropdown>` element exposes attributes that allow the position | |
33 of the `.dropdown-content` relative to the `.dropdown-trigger` to be | |
34 configured. | |
35 | |
36 ```html | |
37 <iron-dropdown horizontal-align="right" vertical-align="top"> | |
38 <div class="dropdown-content">Hello!</div> | |
39 </iron-dropdown> | |
40 ``` | |
41 | |
42 In the above example, the `<div>` with class `.dropdown-content` will be | |
43 hidden until the dropdown element has `opened` set to true, or when the `open` | |
44 method is called on the element. | |
45 | |
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