state-management-utilities/dist/computed.js

State management utilities

import { StateManager } from "./state-manager";
export class Computed extends StateManager {
    get value() {
        return this._clone(this._value);
    }
    set value(_) {
        throw new Error("Computed state manager value cannot be set directly.", {
            cause: {
                uid: this.uid,
            },
        });
    }
    constructor(callback, triggers, config = {
        uid: `CSM-${++counter}`,
    }) {
        if (typeof callback !== "function") {
            throw new Error("Computed state manager callback must be a function.");
        }
        const initialValue = callback();
        if (initialValue instanceof Promise) {
            throw new Error("Computed state manager callback must not return a promise.");
        }
        super(initialValue, config);
        triggers.forEach((trigger) => {
            trigger.register({
                uid: this.uid,
                callback: async () => {
                    this._setValueHandler(callback());
                },
            });
        });
    }
}
let counter = 0;