# 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)