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Nested import error: TypeError: "header.$$ is undefined".

See original GitHub issue

🐛 Bug Report

Nested import error: TypeError: "header.$$ is undefined". Without import app works normally, with import I get this error.

🎛 Configuration

  "name": "sveltetest",
  "version": "1.0.0",
  "description": "",
  "main": "index.html",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  "browserslist": [
    "last 1 chrome versions",
    "last 1 firefox version"
  "author": "Janealter",
  "license": "ISC",
  "devDependencies": {
    "@babel/polyfill": "^7.4.4",
    "parcel-bundler": "^1.12.3",
    "parcel-plugin-svelte": "^3.0.1",
    "svelte": "^3.4.4"

Commands: ./node_modules/parcel-bundler/bin/cli.js index.html --no-cache; ./node_modules/parcel-bundler/bin/cli.js index.html; parcel index.html; parcel index.html --no-cache

💻 Code Sample


<!DOCTYPE html> 
<html lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Svelte Test</title>
    <script src="src/index.js"></script>


import '@babel/polyfill';
import App from './App';

const app = new App({
  target: document.querySelector('main'),
  data: {},


  import Header from './components/Header';

  const name = 'Test';



  <p>Test text</p>

🌍 Your Environment

Svelte 3.4.4, Parcel 1.12.3

Issue Analytics

  • State:closed
  • Created 4 years ago
  • Reactions:2
  • Comments:7 (2 by maintainers)

github_iconTop GitHub Comments

orlov-vocommented, Jul 9, 2019

yes, it’s problem related with HMR. you can use simple workaround with disabling hot reloading: parcel --no-hmr index.html

hectorlfcommented, Jul 6, 2019

Just in case this helps, as it is not explicitly mentioned. I’m seeing:

TypeError: Cannot read property ‘fragment’ of undefined at Object.c (Hello.svelte:117)

With the most simplest nested component. The thing is that this only happens when running “parcel” or “parcel watch”, running “parcel build” generates a correct output.

parcel: 1.12.3 parcel-plugin-svelte: 3.0.1 svelte: 3.6.4

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