[Bug]: error TS2821: Import assertions are only supported when the '--module' option is set to 'esnext' or 'nodenext'. about ts-jest

[mike-lischke]

Would love to get a real solution. For now I suppress the import assertion error using:

// @ts-ignore, because when setting node module resolution to Node16, tsc raises an error for the import assertion.
import configSchema from "./config-schema.json" assert { type: "json" };

[priley86]

any update on this issue? Stumbling on it today 🙃

[sezanzeb]

Try putting

	"extensionsToTreatAsEsm": [".ts"],
	"globals": {
		"ts-jest": {
			"useESM": true
		}
	}

into your jest.config, and set the NODE_OPTIONS=--experimental-vm-modules environment variable, or use node --experimental-vm-modules.

Also see #3525 and https://jestjs.io/docs/ecmascript-modules

[sezanzeb]

(Or use vitest instead of jest https://vitest.dev/guide/migration.html#migrating-from-jest, which works for me without configuring anything at all)