PishPosh is a lightweight, pure-DOM visual programming environment with modular plugin architecture. Users build “programs” by placing stations (nodes) and connecting them (edges). It uses reactive signals and event-driven agents for computation and data flow.
SubwayBuilder (Web Component)
└─ Application (core)
├─ GridPlugin
├─ ToolboxPlugin
├─ PanZoomPlugin
├─ StationPlugin
├─ ConnectPlugin
├─ ConnectionLinePlugin
├─ MoveStationPlugin
├─ AgentLibraryPlugin
├─ AgentsPlugin
├─ AgentChooserPlugin
└─ PropertiesPanelPlugin
Each plugin adds one cohesive feature — from visuals and interaction to agents and metadata — allowing for clean, feature-by-feature extension.
Application.js sets up the main SVG canvas (<svg id="svg-canvas">) and provides:
use(plugin): loads a plugininit(): initializes all pluginsgraph: instance of reactive Graph (nodes & connections)on(event, handler) and emit(event, data)GridPlugin
ToolboxPlugin
toolSelected when user switches between select / station / connect modesPanZoomPlugin
viewBoxChanged to trigger grid redrawStationPlugin
ConnectPlugin
Enables “connecting” mode:
Draws a temporary line during interaction
ConnectionLinePlugin
connectionAdded/RemovedMoveStationPlugin
AgentLibraryPlugin
TimerAgent, GraphAgent)send, receive, and emit dataAgentsPlugin
Graph metadataagentCreated, agentOutput, etc.)AgentChooserPlugin
1. Installation
npm install pishposh
# or clone the repo:
git clone https://github.com/catpea/pishposh.git
2. Add to your HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="styles.css">
</head>
<body>
<subway-builder></subway-builder>
<script type="module" src="./SubwayBuilder.js"></script>
</body>
</html>
3. Interact!
FAQs
Visual Programming Language
We found that pishposh demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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