node_modules/three/src/loaders/FontLoader.d.ts

import { LoadingManager } from './LoadingManager';
import { Font } from './../extras/core/Font';

export class FontLoader {
  constructor(manager?: LoadingManager);

  manager: LoadingManager;

  load(
    url: string,
    onLoad?: (responseFont: Font) => void,
    onProgress?: (event: ProgressEvent) => void,
    onError?: (event: ErrorEvent) => void
  ): void;
  parse(json: any): Font;
}