core-ast-ts-plugin-svelte

Svelte 5 component parser plugin for core-ast-ts.

Parses .svelte files using svelte/compiler and produces an ESTree AST from the instance script block, with the full Svelte AST attached as meta.

Install

npm install core-ast-ts-plugin-svelte

Usage

import { coreAst } from 'core-ast-ts'
import svelte from 'core-ast-ts-plugin-svelte'

const ast = coreAst({ plugins: [svelte()] })

const { ast: program, meta } = ast.get('App.svelte', source)
// meta.svelteAst — full Svelte AST from svelte/compiler
// meta.scriptContent — extracted instance script source
// meta.moduleScriptContent — extracted module script source
// meta.componentName — derived from filename (e.g. 'App')
// meta.hasInstanceScript — whether <script> exists
// meta.hasModuleScript — whether <script context="module"> exists
// meta.lang — script language (e.g. 'ts', 'js')

Options

import svelte from 'core-ast-ts-plugin-svelte'

const ast = coreAst({
  plugins: [svelte({
    modern: true,  // use Svelte 5 modern AST (default: true)
  })],
})

| Option | Default | Description | |--------|---------|-------------| | modern | true | Use Svelte 5 modern AST format |

How it works

1. Calls svelte/compiler parse() to get the Svelte AST
2. Extracts the <script> (instance) and <script context="module"> blocks
3. Uses the ESTree Program from the instance script directly (Svelte's AST includes it), or falls back to parsing with core-ast-ts core parser
4. Returns { ast, source, meta } where meta contains the Svelte AST and derived info

This keeps svelte/compiler as a dependency of this plugin only — core-ast-ts core stays lightweight.

License

MIT