import type { JestConfigWithTsJest } from 'ts-jest' const jestConfig: JestConfigWithTsJest = { // [...] extensionsToTreatAsEsm: ['.ts'], moduleNameMapper: { '^(\\.{1,2}/.*)\\.js$': '$1', }, transform: { // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest` // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest` '^.+\\.tsx?$': [ 'ts-jest', { useESM: true, }, ], }, } export default jestConfig