Updating Slider documentation.

PiperOrigin-RevId: 273960736

Author: leticiarossi

docs/components/Slider.md

@@ -1,6 +1,39 @@
+<!--docs:
+title: "Slider"
+layout: detail
+section: components
+excerpt: "Sliders allow users to make selections from a range of values."
+iconId: slider
+path: /catalog/slider/
+-->
+
 # Slider
 
-The [Slider component](https://material.io/go/design-sliders) is yet to be
-completed, please follow the [tracking
-issue](https://github.com/material-components/material-components-android/issues/84)
-for more information.
+Sliders allow users to make selections from a range of values.
+
+## Design
+
+[Material Design: Slider](https://material.io/go/design-sliders)
+
+## Continuous slider
+
+Continuous sliders allow users to make meaningful selections that don’t require
+a specific value.
+
+## Discrete slider
+
+Discrete sliders display a numeric value label upon pressing the thumb, which
+allows a user to input an exact value.
+
+## Demo
+
+The slider is under active development. You can see the current version of
+the
+[Slider Demo](https://github.com/material-components/material-components-android/tree/master/catalog/java/io/material/catalog/slider/)
+in the Material Android Catalog.
+
+##Code
+
+The
+[Slider Package](https://github.com/material-components/material-components-android/tree/master/lib/java/com/google/android/material/slider)
+contains the code for this component.