Static export failed when upgraded to v8.0.0

[YuriGor]

8.0.0(npm) Bug report

Describe the bug

next app stopped to work on client side after upgrading next to v8.0.0
Coming back to v7.0.3 makes things work.

Here is a broken version with 8.0.0
Here is a working version with 7.0.3

To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. this is fixed commit
   it works well by npm run dev
2. do npm i next@8.0.0 and run an app
3. menu button and smooth scrolling after side bar clicks do not work.
4. In browser console you will see Uncaught TypeError: Cannot read property 'textContent' of null

Expected behavior

No errors in console, all the buttons work, scrolling is smooth

Screenshots

Full error:

Uncaught TypeError: Cannot read property 'textContent' of null
    at Object../node_modules/next/dist/client/index.js (index.js:66)
    at __webpack_require__ (bootstrap:788)
    at fn (bootstrap:149)
    at Object../node_modules/next/dist/client/next-dev.js (next-dev.js:23)
    at __webpack_require__ (bootstrap:788)
    at fn (bootstrap:149)
    at Object.0 (module.js:22)
    at __webpack_require__ (bootstrap:788)
    at checkDeferredModules (bootstrap:45)
    at Array.webpackJsonpCallback [as push] (bootstrap:32)

System information

• OS: Kubuntu 18.04
• Browser: chromium
• Version of Next.js: 8.0.0 from npm

Additional context

CLI command
now init creates nextjs-static example with optimistic package.json:

{
  "scripts": {
    "now-build": "next build && next export -o dist"
  },
  "dependencies": {
    "next": "latest",
    "react": "latest",
    "react-dom": "latest"
  }
}

so it was surprise for me to become a tester of pre-release

[dav-is]

The issue is @engineerapart/nextscript doesn't support Next 8
https://github.com/engineerapart/nextscript

[YuriGor]

@dav-is Thank you for reply.
Could you please recommend some 'official' way to include some polyfill into nextjs app?
In my case it's static app and I need closest selector.
That solution was fine for next 7, but now I see no signs of life in the project, so chances are low v8 will be supported in the nearest future..
May be I missed some docs about topic?

[timneutkens]

This should do 🤔 https://github.com/zeit/next.js/tree/canary/examples/with-polyfills