How to listen to value a and change value b

[beilo]

I have an object

let store  = proxy({
  a:null,
  b:2
})
funcation Api(){
  store.a = 1
}

I want to monitor the change of a and assign a value to b. What's the best way to deal with it?
thank you.

[dai-shi]

You can try proxyWithComputed or derive from valtio/utils.

[beilo]

Thank you very much for your reply

I also need to change b. If you use proxyWithComputed, a new store1 will be added.

I just want to use the store

[dai-shi]

You can subscribe to your state and change it. Be careful to avoid infinite loops. subscribeKey may help.