Why next build contain dev tools code?

[limi58]

Summary

project link: https://github.com/limi58/next-bug

a simple project, but has large js after next build:

this js content seem contain dev tools:

Additional information

No response

Example

project link: https://github.com/limi58/next-bug

[icyJoseph]

this looks like a regression - let me explore it

[icyJoseph]

Some more notes,

• a fresh create-next-app doesn't have this issue
• yes your repository has the issue... so let's get to do a bit of diffing

[icyJoseph]

@limi58 idk exactly why just yet - but your .browserslistrc causes this issue 🤔

[icyJoseph]

If you change your .browserslistrc to:

Chrome >= 50
iOS >= 10
Android >= 5

It should work. I guess webpack (?) on framework code, can't make some guarantees for dead code elimination for older targets (2016), and just keeps the next-devtools import 🤷

[limi58]

Yes work!