# All files / src/context ThemeContext.tsx

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     import React, { createContext, useContext, type ReactNode, type JSX } from "react";
    import { useTheme, type UseThemeResult } from "../hooks/useTheme.js";

    const ThemeContext: React.Context<UseThemeResult | undefined> = createContext<
      UseThemeResult | undefined
    >(undefined);

    /** Provides theme state to the component tree. */
    export function ThemeProvider({ children }: { children: ReactNode }): JSX.Element {
      const themeState = useTheme();
      return <ThemeContext.Provider value={themeState}>{children}</ThemeContext.Provider>;
    }

    /** Consumes the theme context; must be called within a ThemeProvider. */
    export function useThemeContext(): UseThemeResult {
      const ctx = useContext(ThemeContext);
      if (!ctx) {
        throw new Error("useThemeContext must be used within ThemeProvider");
      }
      return ctx;
    }