Use ESNext as default module system (#188)

jest.config.ts

@@ -1,25 +1,18 @@
 import { type JestConfigWithTsJest } from "ts-jest";
 
 const jestConfig: JestConfigWithTsJest = {
- rootDir: "./",
- moduleFileExtensions: ["ts", "js"],
+ preset: "ts-jest/presets/default-esm",
+ moduleNameMapper: {
+ "^(\\.{1,2}/.*)\\.js$": "$1",
+ },
  testMatch: ["**/test/**/*.test.ts", "**/test/tests.ts"],
  coverageProvider: "v8",
  coveragePathIgnorePatterns: ["/node_modules/", "./test"],
- extensionsToTreatAsEsm: [".ts"],
  reporters: [
  "default",
  ["jest-junit", { outputDirectory: "test-results/jest" }],
  ],
  coverageReporters: ["lcov", "text", "text-summary"],
- setupFiles: [],
- preset: "ts-jest/presets/default-esm",
- transform: {
- "^.+\\.ts?$": [
- "ts-jest",
- { useESM: true, tsconfig: "./tsconfig.test.json" },
- ],
- },
 };
 
 export default jestConfig;

lib/index.ts

@@ -1,4 +1,4 @@
-import { base64UrlDecode } from "./base64-url-decode";
+import { base64UrlDecode } from "./base64-url-decode.js";
 
 export interface JwtDecodeOptions {
  header?: boolean;

lib/index.umd.ts

@@ -1 +1 @@
-export { jwtDecode as default } from "./index";
+export { jwtDecode as default } from "./index.js";

rollup.config.ts

@@ -5,10 +5,7 @@ import livereload from "rollup-plugin-livereload";
 import serve from "rollup-plugin-serve";
 
 const isProduction = process.env.NODE_ENV === "production";
-const tsPlugin = typescript({
- rootDir: "lib",
- sourceMap: true,
-});
+const tsPlugin = typescript({ tsconfig: "tsconfig.build.json" });
 
 const plugins = [
  tsPlugin,

test/tests.ts

@@ -1,4 +1,4 @@
-import { jwtDecode, InvalidTokenError, JwtPayload } from "./../lib/index";
+import { jwtDecode, InvalidTokenError, JwtPayload } from "./../lib/index.js";
 import { describe, expect, it } from "@jest/globals";
 
 const token =

tsconfig.build.json

@@ -0,0 +1,8 @@
+{
+ "extends": "./tsconfig.json",
+ "compilerOptions": {
+ "target": "ES2017",
+ "rootDir": "./lib",
+ "sourceMap": true
+ }
+}

tsconfig.json

@@ -1,15 +1,9 @@
 {
  "compilerOptions": {
- "target": "ES2017",
- "allowSyntheticDefaultImports": true,
- "esModuleInterop": true,
- "sourceMap": false,
- "moduleResolution": "node",
- "noImplicitAny": true,
- "downlevelIteration": true,
- "noImplicitThis": true,
+ "target": "ESNext",
+ "module": "ESNext",
+ "moduleResolution": "Node",
  "strict": true,
  "noEmitOnError": true
- },
- "exclude": ["./test", "./build/typings"]
+ }
 }