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buildbabeljsbabel-preset-envcore-js
wube
wube

Reputation: 1103

Do I need to import core-js/stable and regenerator-runtime/runtime when using @babel/preset-env with useBuiltIns:'usage'?

I use babel 7.8.3 together with @babel/preset-env, useBuiltIns: 'usage' and corejs: 3. The documentation for @babel/preset-env is not clear to me.

Do I need to add the following lines at the top of my entry file or is it done automatically by babel?

import 'core-js/stable';
import 'regenerator-runtime/runtime';

Upvotes: 16

Views: 7083

Answers (2)

taoliujun
taoliujun

Reputation: 131

Don't need to add import code by yourself when use usage.

And no more need to manually include the regenerator-runtime helper when compiling generators after babel/core >= 7.18

Upvotes: 2

NirG
NirG

Reputation: 776

According to babel-preset-env docs you should import those modules by yourself

Upvotes: 0

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