doc(sample): add samples to stackblitz (#1059)

Author: JiaLiPassion

Diff for: README.md

@@ -43,6 +43,10 @@ zone.js patched most standard web APIs (such as DOM events, `XMLHttpRequest`, ..
 We are adding support to some nonstandard APIs, such as MediaQuery and
 Notification. Please see [NON-STANDARD-APIS.md](NON-STANDARD-APIS.md) for more details.
 
+## Examples
+
+You can find some samples to describe how to use zone.js in [SAMPLE.md](SAMPLE.md).
+
 ## Modules
 
 zone.js patches the async APIs described above, but those patches will have some overhead.

Diff for: SAMPLE.md

@@ -0,0 +1,23 @@
+# Sample
+
+### Basic Sample
+
+use `zone.js` and `long-stack-trace-zone.js` to display longStackTrace information in html.
+[basic](https://stackblitz.com/edit/zonejs-basic?file=index.js)
+
+### Async Task Counting Sample
+
+use `zone.js` to monitor async tasks and print the count info. 
+[counting](https://stackblitz.com/edit/zonejs-counting?file=index.js)
+
+### Profiling Sample
+
+use `zone.js` to profiling sort algorithm.
+[profiling](https://stackblitz.com/edit/zonejs-profiling?file=index.js)
+
+### Throttle with longStackTrace
+
+use `long-stack-trace-zone` to display full flow of complex async operations such as throttle XHR requests.
+[throttle](https://stackblitz.com/edit/zonejs-throttle?file=index.js)
+
+