@illuminate3 Looks like you haven’t found the ons-splitter component yet. Have a look here. Don’t forget to add the collapse and swipeable attributes.
After defining your template you can grab a hold of the ons-splitter-side with something like @ViewChild(OnsSplitterSide) side: OnsSplitterSide; and then use its methods such as side.open(). Hope it helps.
@iDeepankar Onsen UI is not Ionic. Ionic does have what they call starters as well as their tool provides templates. I would opine that asking about Ionic on their main competitors forum is bad grace; however, I will presume that you really prefer Onsen UI and just didn’t realize you should make the switch yet.