Create Webapp cache local for HMTL5
https://doancongbang1991.wordpress.com/2016/03/08/a-beginners-guide-to-using-the-application-cache/
Update:
A simple Winform C# to create appcache manifest with dowload link:
https://drive.google.com/file/d/0B9a7GsMuCAhzdjRVRUVwZktTbHc/view?usp=sharing
Usage:
Choose your html file location, the application will create the offline.appcache file.
Modify your html with the code:
<html manifest="offline.appcache">
...
</html>