paper-tabs demo

### Plain `paper-tabs`.

### The `no-bar` attribute disables the selection bar.

### The `no-slide` attribute prevents the selection bar from animating when the selection changes.

### The `noink` attribute disables the ink ripple animation seen when the user activates a tab (by clicking, tapping, etc.).

### The `scrollable` attribute causes the tabs to scroll, rather than compress, when there is not enough space. Arrow buttons appear when any of the tabs are not completely visible.

### The `fit-container` attribute causes scrollable tabs to stretch to fit their container if the tabs don't need to scroll.

### Tab layout is affected by the writing direction of the surrounding area.

### Use the `align-bottom` attribute when your tabs are positioned below the content they control. The selection bar will be shown at the top of the tabs.

### Use the `link` attribute when a `paper-tab` contains a link. The link will fill the entire tab. `paper-tabs` implements its own tabindexing and keyboard focus patterns so an anchor placed inside should set `tabindex="-1"`.

### Tabs can be used in a `paper-toolbar`.

### Use `autoselect` to enable automatic tab selection.

### Use `autoselect-delay` to adjust the delay between the last keyup event and when the tab is automatically selected (when `autoselect` is true).