import { TextDecoderStream } from "https://deno.land/x/deno@v1.27.1/ext/web/lib.deno_web.d.ts";
type
{ prototype: TextDecoderStream; new (label?: string, options?: TextDecoderOptions): TextDecoderStream; }
x/deno/ext/web/lib.deno_web.d.ts>TextDecoderStream
import { TextDecoderStream } from "https://deno.land/x/deno@v1.27.1/ext/web/lib.deno_web.d.ts";