typed streams

typed-streams is a collection of typed stream wrappers to simplify using stream-chain with TypeScript. They allow to specify the type of the input and output streams.

Four classes are exported:

• TypedReadable<R> extends Readable.
• TypedWritable<W> extends Writable.
• TypedDuplex<W, R> extends Duplex.
• TypedTransform<W, R> extends Transform.

In all those classes R means a type that can be read from a stream, and W means a type that can be written to a stream.

Examples:

import chain from 'stream-chain';
import {TypedTransform} from 'stream-chain/typed-streams.js';

const a = new Transform({
    objectMode: true,
    transform(x, _, callback) {
      callback(null, String(x + 1));
    }
  }),
  b = new TypedTransform<number, string>({
    objectMode: true,
    transform(x, _, callback) {
      callback(null, String(x + 1));
    }
  });

const pipeline1 = chain([a] as const);                                   // Chain<any, any>
const pipeline2 = chain([b] as const);                                   // Chain<number, string>
const pipeline3 = chain([a as TypedTransform<number, string>] as const); // Chain<number, string>