Update state based on existing state?

[fsharpn00b]

Hello,

Is there a way to update the state based on the existing state? For example:

import { Persistent } from "narraleaf-react";
type State = {
    mood: number;
};
const state = new Persistent<State>("state", {
    mood: 10,
});

// Player does something that decreases mood by 1
state.set("mood", state.get("mood") - 1),

Thank you!

[helloyork]

Yes, please refer to set<K extends StringKeyOf>

The second overload allows you to pass in a function to update the data based on the previous state.

state.set("mood", (mood) => mood - 1),

[fsharpn00b]

Beautiful, thank you! I overlooked that.