pkg/js: add link to example

Review URL: https://codereview.chromium.org/1406093002 .

pkg/js/README.md

@@ -20,6 +20,8 @@ If you are passing a Dart function to a JavaScript API, you must wrap it using
 
 ### Examples
 
+There is a [full example](https://github.com/dart-lang/sdk/tree/master/pkg/js/example) hosted with the `package:js` source code.
+
 #### Calling methods
 
 ```dart

pkg/js/example/README.md

@@ -0,0 +1,14 @@
+An example of using [Chart.js](aoeU).
+
+This example is ported from [this sample](https://github.com/nnnick/Chart.js/blob/b8691c9581bff0eeecb34f98e678dc045a18f33e/samples/line.html) in the `Chart.js` repository.
+
+To view the example, run `pub serve example` from the root directory of this project – the directory containing `pubspec.yaml`.
+
+```console
+> pub serve example
+Loading source assets...
+Serving js example on http://localhost:8080
+Build completed successfully
+```
+
+You can view it with Dartium or any other browser.

pkg/js/pubspec.yaml

@@ -1,5 +1,5 @@
 name: js
-version: 0.6.0-beta.3
+version: 0.6.0-beta.4
 authors:
 - Dart Team <misc@dartlang.org>
 description: Access JavaScript from Dart.