update

bin/Baz.d.ts

+export default class Baz {
+    constructor();
+}

bin/Baz.js

+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var Baz = /** @class */ (function () {
+    function Baz() {
+        console.log('I am Baz.');
+    }
+    return Baz;
+}());
+exports.default = Baz;

bin/bar.d.ts

+declare const bar: () => void;
+export default bar;

bin/bar.js

+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var bar = function () {
+    console.log('I am bar.');
+};
+exports.default = bar;

bin/foo.d.ts

+declare const foo: () => void;
+export default foo;

bin/foo.js

+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var foo = function () {
+    console.log('I am foo.');
+};
+exports.default = foo;

bin/index.d.ts

+import foo from "./foo";
+import bar from "./bar";
+import Baz from "./Baz";
+export { foo, bar, Baz };

bin/index.js

+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var foo_1 = require("./foo");
+exports.foo = foo_1.default;
+var bar_1 = require("./bar");
+exports.bar = bar_1.default;
+var Baz_1 = require("./Baz");
+exports.Baz = Baz_1.default;

package.json

+{
+  "name": "libray-demo-ts",
+  "version": "1.0.0",
+  "description": "",
+  "main": "./bin/index.js",
+  "types": "./bin/index.d.ts",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@gitlab2.dui88.com:wanghongyuan/libray-demo-ts.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}
\ No newline at end of file

src/Baz.ts

+export default class Baz {
+    constructor() {
+        console.log('I am Baz.')
+    }
+}
\ No newline at end of file

src/bar.ts

+const bar = ()=>{
+    console.log('I am bar.')
+}
+export default bar;
\ No newline at end of file

src/foo.ts

+const foo = ()=>{
+    console.log('I am foo.')
+}
+export default foo;
\ No newline at end of file

src/index.ts

+import foo from "./foo";
+import bar from "./bar";
+import Baz from "./Baz";
+
+export {
+    foo, bar, Baz
+}
\ No newline at end of file

tsconfig.json

+{
+  "compilerOptions": {
+    "outDir": "bin",
+    "target": "es5",
+    "module": "commonjs",
+    "declaration": true,
+    "declarationDir": "bin"
+  }
+}
\ No newline at end of file