src/app/types/global.d.ts

declare module '*.scss' {
    interface IClassNames {
        [className: string]: string;
    }
    const classnames: IClassNames;
    export = classnames;
}

declare module 'inputmask';
declare module '*.png';
declare module '*.jpg';
declare module '*.jpeg';
declare module '*.svg' {
    import React from 'react';

    const SVG: React.VFC<React.SVGProps<SVGSVGElement>>;
    export default SVG;
}