| Index: third_party/polymer/v1_0/components-chromium/iron-overlay-behavior/README.md
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| diff --git a/third_party/polymer/v1_0/components-chromium/iron-overlay-behavior/README.md b/third_party/polymer/v1_0/components-chromium/iron-overlay-behavior/README.md
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| -
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| -<!---
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| -
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| -This README is automatically generated from the comments in these files:
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| -iron-overlay-backdrop.html iron-overlay-behavior.html
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| -
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| -Edit those files, and our readme bot will duplicate them over here!
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| -Edit this file, and the bot will squash your changes :)
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| -
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| -The bot does some handling of markdown. Please file a bug if it does the wrong
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| -thing! https://github.com/PolymerLabs/tedium/issues
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| -
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| --->
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| -
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| -[](https://travis-ci.org/PolymerElements/iron-overlay-behavior)
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| -
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| -_[Demo and API docs](https://elements.polymer-project.org/elements/iron-overlay-behavior)_
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| -##<iron-overlay-backdrop>
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| -
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| -`iron-overlay-backdrop` is a backdrop used by `Polymer.IronOverlayBehavior`. It should be a
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| -singleton.
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| -### Styling
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| -
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| -The following custom properties and mixins are available for styling.
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| -
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| -| Custom property | Description | Default |
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| -| --- | --- | --- |
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| -| `--iron-overlay-backdrop-background-color` | Backdrop background color | #000 |
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| -| `--iron-overlay-backdrop-opacity` | Backdrop opacity | 0.6 |
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| -| `--iron-overlay-backdrop` | Mixin applied to `iron-overlay-backdrop`. | {} |
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| -| `--iron-overlay-backdrop-opened` | Mixin applied to `iron-overlay-backdrop` when it is displayed | {} |
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| -##Polymer.IronOverlayBehavior
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| -
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| -Use `Polymer.IronOverlayBehavior` to implement an element that can be hidden or shown, and displays
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| -on top of other content. It includes an optional backdrop, and can be used to implement a variety
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| -of UI controls including dialogs and drop downs. Multiple overlays may be displayed at once.
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| -
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| -### Closing and canceling
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| -
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| -A dialog may be hidden by closing or canceling. The difference between close and cancel is user
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| -intent. Closing generally implies that the user acknowledged the content on the overlay. By default,
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| -it will cancel whenever the user taps outside it or presses the escape key. This behavior is
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| -configurable with the `no-cancel-on-esc-key` and the `no-cancel-on-outside-click` properties.
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| -`close()` should be called explicitly by the implementer when the user interacts with a control
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| -in the overlay element. When the dialog is canceled, the overlay fires an 'iron-overlay-canceled'
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| -event. Call `preventDefault` on this event to prevent the overlay from closing.
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| -### Positioning
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| -By default the element is sized and positioned to fit and centered inside the window. You can
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| -position and size it manually using CSS. See `Polymer.IronFitBehavior`.
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| -
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| -### Backdrop
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| -
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| -Set the `with-backdrop` attribute to display a backdrop behind the overlay. The backdrop is
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| -appended to `<body>` and is of type `<iron-overlay-backdrop>`. See its doc page for styling
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| -options.
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| -
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| -### Limitations
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| -
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| -The element is styled to appear on top of other content by setting its `z-index` property. You
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| -must ensure no element has a stacking context with a higher `z-index` than its parent stacking
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| -context. You should place this element as a child of `<body>` whenever possible.
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