Jason Laster

Experimental something something.

My dotfiles, nothing to look here

ECMAScript parsing infrastructure for multipurpose analysis

A collection of docs for primary blink devtools classes

Firefox Debugger App

Shared Devtools Themes

Gist for math equations

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vite+ts+pnpm demo

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An opinionated git cli for OSS

A way to talk to Pry from a separate application

Highlight Focusable elements

Chrome DevTools API frontend

a ruby command-line program for helping a rubyist play scrabble.

Mochitest CLI & Reporter

Team Mixers - coordinates pairings and sends out emails

Web app and publisher for the Diana TNBC wiki

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Simple anthropic tool use coding_agent

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A flexible WSGI implementation and toolkit

Community guides for open source creators

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The documentation for Chrome DevTools

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Shared Linters for Devtools

Helps serialize babel ast nodes for jest snapshots

Chrome Debugging Protocol interface for Node.js

Course Follower is a simple website for Dartmouth students to be notified when a class becomes available.

A Pry IDE that lives in WebKit

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Static photo journal built with React Photo Album

📎 Paperclip is an MCP server that enables searching and retrieving research papers rom Arxiv, the Open Science Framework (OSF) API & OpenAlex

A declarative, efficient, and flexible JavaScript library for building user interfaces.

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Create React apps with no build configuration.

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Agentic components of the Llama Stack APIs

update scanned PDF filenames and OCR text

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Tools for efficient app building

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style loader module for webpack

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all of the workflows of n8n i could find (also from the site itself)

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Upload MD docs to notion

Amazon Nova Act is a research preview of a new AI model for developers to build agents that take actions in web browsers

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transcribe investor calls

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Scripts to sync user data with attio

🤖 Fully typesafe Router for React (and friends) w/ built-in caching, 1st class search-param APIs, client-side cache integration and isomorphic rendering.

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A template with Next.js 13 app dir, Contentlayer, Tailwind CSS and dark mode.

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ESLint plugin for prettier formatting

Simple script for linting inlined JS strings

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A full-featured, hackable Next.js AI chatbot built by Vercel Labs

📋 React Hooks for form state management and validation (Web + React Native)

The simplest, fastest way to get business intelligence and analytics to everyone in your company :yum:

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An alternate test inbox

wpt runner

The best way to start a full-stack, typesafe Next.js app

Clone, deploy, and fully customize a SaaS subscription application with Next.js.

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Fast, easy and reliable testing for anything that runs in a browser.

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The headless editor framework for web artisans.

Build Better Websites. Create modern, resilient user experiences with web fundamentals.

🔍 Find elements in Playwright with queries from Testing Library

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A tiny little drawing app.

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The React documentation website

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Visualizer for XState machines

This is an example app used to showcase Cypress.io testing.

Codemod is a tool/library to assist you with large-scale codebase refactors that can be partially automated but still require human oversight and occasional intervention. Codemod was developed at Facebook and released as open source.

Playwright harness and tests used by replay CI

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A customizable test framework to build your own test frameworks

Blazing fast, instant realtime GraphQL APIs on Postgres with fine grained access control, also trigger webhooks on database events.

The simplest way to add authentication to your React app. Supports various providers.

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Web app with developer tools built on the Web Replay Protocol

Begin app

Record Replay gecko based browser source

Learn Python by executing code online and visualizing data structures

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site with climate angels

Directory of candidates running for office

Discover the organizations solving climate change

Simple .map for urls in CSS

resources for investing in an awesome climate

A directory for housing the MC devtools assets

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time travelers podcast

Firefox Profiler — Web app for Firefox performance analysis

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Created with CodeSandbox

Created with CodeSandbox

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Adds static typing to JavaScript to improve developer productivity and code quality.

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Consume and generate source maps.

An app for Emily's List house candidates

Server Web Workers for node.js that work

queries and scripts for querying bigquery for debugger.html

JavaScript wrapper for the Bugzilla REST API

JSX in Markdown for ambitious projects

Database of Emilys Lists' Candidates

Firefox Debugger Website!

mdx gatsby plugin

:lock: Your lockfile, up to date, all the time

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Test Suites for Web Platform specifications—including WHATWG, W3C and others

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simple babel tranform script

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:rocket: Packages for Firefox DevTools

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A sample application mono repo

forked gatsby-advanced-starter made for documentation sites.

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A friendly logger

:ship: Ship 2 Gecko

Demo for "Warping Time with Async/Await" talk for jsheroes.io

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a repo for testing mochitests

PostCSS plugin that prefix a namespace to a selector

Pretty Fast is a source-map-generating JavaScript pretty printer, used by the Firefox Developer Tools debugger.

An extension that allows inspection of React component hierarchy in the Chrome and Firefox Developer Tools.

Utility to get the plain text content of a node

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Natural language processor powered by plugins

📚 UI Component Dev Environment for React

sprintf.js is a complete open source JavaScript sprintf implementation

Lint tool for Opscode Chef cookbooks.

Prettier is an opinionated JavaScript formatter.

Compile time code replacement for babel similar to Webpack's DefinePlugin

:tropical_fish: Babel is a compiler for writing next generation JavaScript.

PostCSS plugin that polyfill Bi-directional CSS properties and values to suppot rtl and ltr rules in all browsers

Making mochitests OK.

Home of information about Maintainerati events.

A command line tool to help build, run, and test web extensions

Firefox Devtools reps

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Documentation for CircleCI.

Webpack plugin that forces require to return same instance of module regardless the place where import occurs.

A small library for creating elements inspired by jsonML and react's dom api

Generate flow coverage reports in JSON, HTML and in the console.

:dragon: A tool for managing JavaScript projects with multiple packages.

Find and load configuration from a package.json property, rc file, or CommonJS module

Mocha Integration Runner

A terminal debugger for remote js processes (a.k.a browser, node)

Find broken links like a breeze

A browser automation framework and ecosystem.

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A quick experiment to help migrate to HTML

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Package management CLI

A vizualiztion for the esprima homepage

Documentation about css-modules

Collection of notes on the planck keyboard

A JavaScript utility library delivering consistency, modularity, performance, & extras.

The ESTree Spec

Spectacular Test Runner for JavaScript

Preprocessor for converting JS files into JS variables

sample test harness

An actively-maintained fork of Esprima

Simple utility for selecting the next / previous ':tabbable' element.