Set LocalStorage
Open your app in a predictable state
Set LocalStorage writes a key and value into browser localStorage. Use it to seed client side state before the application reads it.
Use it to control what the app sees:
Feature flags before the page script runs
Saved preferences
Known test data for a predictable UI
Set LocalStorage pairs with Check LocalStorage to confirm the value persisted, Store LocalStorage to read it back and Reload so the app picks it up.
