import * as React from 'react';
import { primaryFont, secondaryFonts } from './injectFont';
export type CustomFontProps = {
    primaryFont?: primaryFont;
    secondaryFonts?: secondaryFonts;
    /**
     * A function that returns an injectGlobal call with your @font-face
     * declarations */
    injectCss: () => string;
};
export default class CustomFont extends React.PureComponent<CustomFontProps, {}> {
    componentDidMount: () => void;
    render(): null;
}