interface CanvasRenderingContext2D { filter: string; } // Handling file-loader imports: declare module '*.png' { const content: string; export default content; } declare module '*.jpg' { const content: string; export default content; } declare module '*.gif' { const content: string; export default content; } declare module '*.svg' { const content: string; export default content; } declare module '*.wasm' { const content: string; export default content; } declare module 'url-loader!*' { const value: string; export default value; } declare var VERSION: string; declare var ga: { (...args: any[]): void; q: any[]; };