The documentation comes from the Markdown files in the source code, so is always up-to-date but available only in English. Enjoy!
npm install --save @types/d3-fetch
This package contains type definitions for d3-fetch (https://d3js.org/d3-fetch/).
Files were exported from https://www.github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/d3-fetch
These definitions were written by Hugues Stefanski https://github.com/ledragon.