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 js/ts with `ts-jest` // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest` "^.+\\.tsx?$": [ "ts-jest", { useESM: true, // ts-jest configuration goes here }, ], }, extensionsToTreatAsEsm: [".ts"], watchPathIgnorePatterns: ["/node_modules", "/.git", "/.*~"] } export default jestConfig;