From JQuery to Ionic 2

I have half created an App in JQuery and after reading up online hearing that Ionic would be better, I am now trying to re-create using Ionic V2.

In JQuery it has the storage function where i could put selectedDetails in and then track what has been selected earlier with a bit of Javascript.

I cant seem to re-create this function in Ionic because there is no storage option. Is there a way to track what has been clicked on and bring in the relevant details from the database from then on in just like I can do in JQuery?
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