6.4.12 is broken in Next.js

[yura3d]

• Swiper Version: 6.4.12
• Platform/Target and Browser Versions: Node.js 15.8.0, Next.js 10.0.7 (SSR mode)

What You Did

Add swiper with yarn to my Next.js app, then add the next strings to my React component:

import SwiperCore, { Keyboard, Mousewheel } from 'swiper'
...
SwiperCore.use([Keyboard, Mousewheel])

Run the app in SSR mode.

Expected Behavior

No errors like it was in 6.4.11 and below.

Actual Behavior

I can provide the whole stacktrace but it contains only webpack-specific things and nothing related to swiper files.

I compared 6.4.12 to 6.4.11 and think that something went wrong in module bundling here.

[vltansky]

Angular demo: https://stackblitz.com/edit/pointermove-issue-z8rczb?file=src%2Fapp%2Fapp.component.ts

[jamiecounsell]

I am also having this exact same issue in a react app bundled with webpack (no next.js around). Same function coming up as "is not a function" when called.

Looking at the diff between the version we're running (6.4.10, working) and the updated version (6.4.12, failing), I do see a few changes related to bundling that have likely caused this, though I haven't had time to dig into it much.