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feat(compiler): allow isolatedModule: true to have ESM support #2219

Merged
merged 1 commit into from Dec 17, 2020
Merged

feat(compiler): allow isolatedModule: true to have ESM support #2219

merged 1 commit into from Dec 17, 2020

Commits on Dec 16, 2020

  1. feat(compiler): allow isolatedModule: true to have ESM support 

    Introduce a new config option `useESM`. When this option is true and Jest runtime supports ESM for certain files, `ts-jest` will transform those files to ESM syntax based on the `module` defined in user tsconfig.

If `useESM: true` and Jest supports ESM syntax for the file and `module` from tsconfig is not `es2015/es2020/esnext`, `esnext` will be used as default.

Related to #1709
    @ahnpnl
    ahnpnl committed Dec 16, 2020
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