hi Mohitdb7
consider these:
1.you cant launch html file present directly under localfolder (security reasons) but you can launch html files from inside subfolders of localfolder
eg: ms-appdata:///local/subfolder/my.html can be launched from webview.
2.your other data (images etc.) will work now with address relative to your html file.
3.you need to use navigatetolocalstreamuri and buildlocalstreamuri along with resolver to interact between javascript and native (when launching from localstorage)
you can refer to this link to now more about point 3.
WebView.NavigateToLocalStreamUri method - Windows app development[
^].
hope it helps.