npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

schema-stream

v3.2.0

Published

![GitHub Actions Status](https://github.com/github/docs/actions/workflows/test.yml/badge.svg?branch=main) [![NPM Version](https://img.shields.io/npm/v/schema-stream.svg)](https://www.npmjs.com/package/schema-stream)

Downloads

61,505

Readme

schema-stream

GitHub Actions Status NPM Version

schema-stream is a utility for parsing streams of JSON data. It provides a safe-to-read-from stubbed version of the data before the stream has fully completed. This utility is essential for handling large JSON streams efficiently and is built on top of Zod schema validation.

Features

  • Stream JSON data parsing with partial data availability.
  • Zod schema validation for robust data handling.
  • Extensible configuration for customized parsing needs.

Installation

npm install schema-stream zod

Basic Usage

To use schema-stream, create a new instance of the class, passing in a Zod schema and optional default data. Then, call the parse method on the instance to parse a JSON stream.

import { SchemaStream } from 'schema-stream';
import { z } from 'zod';

const schema = z.object({
  someString: z.string(),
  someNumber: z.number()
});

const response = await getSomeStreamOfJson();

const parser = new SchemaStream(schema, {
  someString: "default string"
});

const streamParser = parser.parse({});

response.body?.pipeThrough(parser);

const reader = streamParser.readable.getReader();
const decoder = new TextDecoder();
let result = {};

while (!done) {
  const { value, done: doneReading } = await reader.read();
  done = doneReading;

  if (done) {
    console.log(result);
    break;
  }

  const chunkValue = decoder.decode(value);
  result = JSON.parse(chunkValue);
}

Note

A lot of the internal parser logic was forked from streamparser-json. The primary difference is the requirement of a Zod schema and optional default data, allowing for a fully stubbed version of the expected data to be returned before the stream has completed.

Related Packages

  • @hackdance/hooks: A set of React hooks for working with streams, including a use-json-stream hook that uses schema-stream.
  • @hackdance/agents: Another set of React hooks for stream data handling.

Contributing

Contributions to schema-stream are always welcome, whether it be improvements to the documentation or new functionality. Please feel free to open an issue or create a pull request.

License

MIT © hack-dance