Skyfire

A fast JavaScript/TypeScript parser library for Go, forked from esbuild.

Why Skyfire?

Skyfire exposes esbuild's internal JavaScript parser as a public Go API. This enables:

• AST access: Full access to the parsed JavaScript/TypeScript AST
• Speed: Leverages esbuild's extremely fast parser
• ES6+ support: Handles modern JavaScript including modules, decorators, and class fields
• Error reporting: Detailed parse errors with line and column numbers

Use Cases

• Static analysis of JavaScript/TypeScript code
• Extracting metadata from ES6 modules (imports, exports, decorators)
• Building development tools that need to understand JS/TS structure

Installation

go get github.com/octoberswimmer/skyfire

Usage

package main

import (
    "fmt"
    "github.com/octoberswimmer/skyfire/parser"
)

func main() {
    source := `
        import { foo } from 'bar';
        export default class MyClass {
            @api myProperty;
        }
    `

    ast, err := parser.Parse(source, parser.Options{})
    if err != nil {
        fmt.Printf("Parse error: %v\n", err)
        return
    }

    // Access imports, exports, classes, decorators, etc.
    for _, imp := range ast.Imports {
        fmt.Printf("Import: %s\n", imp.Path)
    }
}

License

MIT License - see LICENSE.md

Acknowledgments

This project is a fork of esbuild by Evan Wallace. The core parser code is from esbuild with modifications to expose it as a public API.