Typescript doesn't recognise declared modules (*.svg) from my declaration file

Question

Along other declarations, I've declared the following modules in my ./src/types.d.ts file:

/// <reference types="@emotion/react/types/css-prop" />
import '@emotion/react';
import { PureComponent, SVGProps } from 'react';

declare module '*.svg' {
  export class ReactComponent extends PureComponent<SVGProps<SVGSVGElement>> {}
}
declare module '*.ttf';
declare module '*.eot';
declare module '*.woff';
declare module '*.woff2';

When I run tsc --noEmit errors like ...

src/fonts/fonts.ts:39:31 - error TS2307: Cannot find module './pt-sans-v12-latin-ext_latin-regular.woff' or its corresponding type declarations.

39 import PTSansregularWOFF from './pt-sans-v12-latin-ext_latin-regular.woff';
                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/fonts/fonts.ts:40:32 - error TS2307: Cannot find module './pt-sans-v12-latin-ext_latin-regular.woff2' or its corresponding type declarations.

40 import PTSansregularWOFF2 from './pt-sans-v12-latin-ext_latin-regular.woff2';
                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/layouts/default/NavigationBar.tsx:4:41 - error TS2307: Cannot find module '../../images/brand.svg' or its corresponding type declarations.

4 import { ReactComponent as Brand } from '../../images/brand.svg';
                                          ~~~~~~~~~~~~~~~~~~~~~~~~

... are spit out.

My tsconfig.json looks like this:

{
  "include": ["./src/**/*", "./.gatsby/**/*", "./*.ts", "./plugins/**/*"],
  "files": ["./src/types.d.ts"],
  "compilerOptions": {
    "target": "ESNext",
    "module": "ESNext",
    "lib": ["dom", "ES2017", "ES2019"],
    "jsx": "react-jsx",
    "strict": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "noEmit": true,
    "skipLibCheck": true,
    "moduleResolution": "node",
    "resolveJsonModule": true
  }
}

My file tree looks like this:

How to make Typescript find my corresponding type declarations?

Interestingly the other parts of my types.d.ts have an effect, like when I define the interface Theme of @emotion/react.

Answer 1

I use it this way:

declare module '*.jpg';
declare module '*.png';
declare module '*.woff2';
declare module '*.woff';
declare module '*.ttf';

declare module '*.svg' {
  import React = require('react');

  export const ReactComponent: React.SFC<React.SVGProps<SVGSVGElement>>;
  const src: string;
  export default src;
}

And then import it like this:

import { ReactComponent as Logo } from './svg/logo.svg';
import SomeImage from './images/background.png';