In virtual mode, the Tree Grid is created on demand. In this case, Child records are created and initialized when the parent record is expanded. TypeScript example.
Task
Person Name
Duration
Office suppliesShelley Ohno6 hours
Fix front doorAntoni Nagase7 hours
Kitchen suppliesPeter Ohno2 hours
Office suppliesElio Saylor10 hours
Clean kitchenPeter Burke4 hours
Office suppliesAndrew Fuller3 hours
Fix lightsBeate Nagase2 hours
Cleaning suppliesBeate Wilson10 hours
FitnessMartin Nagase5 hours
Decorate living roomMichael Vileid4 hours
1-10 of 3000