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Upgrading to 5 results in `useBuiltIns` option without declaring a core-js version.

See original GitHub issue

When upgrading to v5, I get the following warnings:

WARNING: We noticed you're using the `useBuiltIns` option without declaring a core-js version.

I fixed it by adding the following babel preset:

['@babel/preset-env', { useBuiltIns: 'usage', corejs: 2 }]

Issue Analytics

State:
Created 4 years ago
Reactions:8
Comments:12 (10 by maintainers)

Top GitHub Comments

3reactions

shilmancommented, Mar 26, 2019

@mohamedmansour Everybody who uses Storybook has it. It’s another babel minor version upgrade doozy 😆

2reactions

shilmancommented, Apr 1, 2019

Jiminy cricket!! I just released https://github.com/storybooks/storybook/releases/tag/v5.0.6 containing PR #6267 that references this issue. Upgrade today to try it out!

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