WebAssembly SGR Parser Example

This example demonstrates how to use the Ghostty VT library from WebAssembly to parse terminal SGR (Select Graphic Rendition) sequences and extract text styling attributes.

Building

First, build the WebAssembly module:

bash

zig build lib-vt -Dtarget=wasm32-freestanding -Doptimize=ReleaseSmall

This will create zig-out/bin/ghostty-vt.wasm.

Running

Important: You must serve this via HTTP, not open it as a file directly. Browsers block loading WASM files from file:// URLs.

From the root of the ghostty repository, serve with a local HTTP server:

bash

# Using Python (recommended)
python3 -m http.server 8000

# Or using Node.js
npx serve .

# Or using PHP
php -S localhost:8000

Then open your browser to:

http://localhost:8000/example/wasm-sgr/