react-plot/lib/contexts/plotController/nestableContext.js

Library of React components to render SVG 2D plots.

import { jsx as _jsx } from "react/jsx-runtime";
import { createContext, useContext, useMemo } from 'react';
export function createNestableContext(defaultValue) {
    const context = createContext(new Map());
    function useNestedContext(id) {
        const values = useContext(context);
        if (values.has(id)) {
            return values.get(id);
        }
        return defaultValue;
    }
    function NestedContextProvider(props) {
        const { id, value, children } = props;
        const parentValues = useContext(context);
        const mergedValues = useMemo(() => {
            const merged = new Map(parentValues);
            merged.set(id, value);
            return merged;
        }, [parentValues, id, value]);
        return _jsx(context.Provider, { value: mergedValues, children: children });
    }
    return {
        useNestedContext,
        NestedContextProvider,
    };
}
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