[](https://travis-ci.org/PolymerElements/iron-collapse)
_[Demo and API Docs](https://elements.polymer-project.org/elements/iron-collapse)_
##<iron-collapse>
`iron-collapse` creates a collapsible block of content. By default, the content
will be collapsed. Use `opened` or `toggle()` to show/hide the content.
Content goes here...
...
toggle: function() {
this.$.collapse.toggle();
}
`iron-collapse` adjusts the height/width of the collapsible element to show/hide
the content. So avoid putting padding/margin/border on the collapsible directly,
and instead put a div inside and style that.