fix(jest): support top-level await in Jest config files (fixes #1918)#2207
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fix(jest): support top-level await in Jest config files (fixes #1918)#2207
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- Added experimentalVmModules: true to ts-node registration in load-module.ts - Changed module compilation target to ES2022 to enable top-level await support - Updated TS file loading to use dynamic import for proper ESM handling - Added integration test demonstrating top-level await support This enables users to use top-level await in their Jest config files (jest.config.ts), which is useful for configuration that needs to load external resources or dependencies before creating the Jest configuration object. Fixes: #1918
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What
This PR adds support for top-level await in Jest config files (jest.config.ts).
Why
Users need to load external resources or dependencies before creating the Jest configuration object. Top-level await is the standard ES2022 feature for this pattern.
How
experimentalVmModules: trueto ts-node registration inload-module.tsto enable ES modules supporttop-level-await.spec.ts) demonstrating the feature worksTesting
examples/jest/simple-app/jest.config.ts) now demonstrates the featureFixes
Closes #1918