Method constructor

packages/compiler-sfc/src/script/context.ts:83–133

(
    public descriptor: SFCDescriptor,
    public options: Partial<SFCScriptCompileOptions>,
  )

  fs?: NonNullable<SFCScriptCompileOptions['fs']>

  constructor(
    public descriptor: SFCDescriptor,
    public options: Partial<SFCScriptCompileOptions>,
  ) {
    const { script, scriptSetup } = descriptor
    const scriptLang = script && script.lang
    const scriptSetupLang = scriptSetup && scriptSetup.lang

    this.isJS = isJS(scriptLang, scriptSetupLang)
    this.isTS = isTS(scriptLang, scriptSetupLang)

    const customElement = options.customElement
    const filename = this.descriptor.filename
    if (customElement) {
      this.isCE =
        typeof customElement === 'boolean'
          ? customElement
          : customElement(filename)
    }
    // resolve parser plugins
    const plugins: ParserPlugin[] = resolveParserPlugins(
      (scriptLang || scriptSetupLang)!,
      options.babelParserPlugins,
    )

    function parse(input: string, offset: number): Program {
      try {
        return babelParse(input, {
          plugins,
          sourceType: 'module',
        }).program
      } catch (e: any) {
        e.message = `[vue/compiler-sfc] ${e.message}\n\n${
          descriptor.filename
        }\n${generateCodeFrame(
          descriptor.source,
          e.pos + offset,
          e.pos + offset + 1,
        )}`
        throw e
      }
    }

    this.scriptAst =
      descriptor.script &&
      parse(descriptor.script.content, descriptor.script.loc.start.offset)

    this.scriptSetupAst =
      descriptor.scriptSetup &&
      parse(descriptor.scriptSetup!.content, this.startOffset!)
  }

  getString(node: Node, scriptSetup = true): string {
    const block = scriptSetup