// jest.config.ts import type { JestConfigWithTsJest } from 'ts-jest'; const jestConfig: JestConfigWithTsJest = { // [...] preset: 'ts-jest/presets/default-esm', // or other ESM presets moduleNameMapper: { '^(\\.{1,2}/.*)\\.js$': '$1', }, transform: { // '^.+\\.[tj]sx?$' to process ts,js,tsx,jsx with `ts-jest` // '^.+\\.m?[tj]sx?$' to process ts,js,tsx,jsx,mts,mjs,mtsx,mjsx with `ts-jest` '^.+\\.tsx?$': [ 'ts-jest', { useESM: true, }, ], }, }; export default jestConfig;