Parsing svelte

parse.js

const { compile, preprocess } = require('svelte');

async parse(inputCode) {
  let svelteOptions = {
  	compilerOptions: {
    	generate: 'dom',
    	format: 'cjs',
    	store: true,
     	filename: this.relativeName,
      css: false
    },
    preprocess: undefined
  };

  const customConfig = await this.getConfig(['.svelterc', 'svelte.config.js', 'package.json']);
  if (customConfig) {
    svelteOptions = Object.assign(svelteOptions, customConfig.svelte || customConfig);
  }

  if (svelteOptions.preprocess) {
    const preprocessed = await preprocess(inputCode, svelteOptions.preprocess);
    inputCode = preprocessed.toString();
  }

  return compile(inputCode, svelteOptions.compilerOptions);
}