feat: ✨ add config and src files

src/index.ts

@@ -0,0 +1,8 @@
+import { add, subtract } from "./math";
+
+export { add, subtract };
+
+export default {
+  add,
+  subtract
+};

src/math.ts

@@ -0,0 +1,7 @@
+export function add(a: number, b: number) {
+  return a + b;
+}
+
+export function subtract(a: number, b: number) {
+  return a - b;
+}

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "esModuleInterop": true,
+    "lib": ["ESNext", "DOM"],
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "paths": {
+      "~/*": ["./src/*"]
+    },
+    "resolveJsonModule": true,
+    "sourceMap": true,
+    "strict": true,
+    "target": "ESNext"
+  },
+  "include": ["./src/**/*.ts", "./tests/**/*.test.ts"],
+  "exclude": ["node_modules", "dist"]
+}

tsup.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from "tsup";
+
+const isProduction = process.env.NODE_ENV === "production";
+
+export default defineConfig(({ watch = false }) => ({
+  clean: true,
+  dts: true,
+  entry: {
+    index: "src/index.ts",
+  },
+  external: [],
+  format: ["cjs", "esm"],
+  minify: isProduction,
+  sourcemap: isProduction,
+  watch,
+}));

vitest.config.ts

@@ -0,0 +1,22 @@
+/// <reference types="vitest" />
+
+import { defineConfig } from "vitest/config";
+import { resolve } from "node:path";
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      "~": resolve(__dirname, "src"),
+    },
+  },
+  test: {
+    coverage: {
+      provider: 'c8',
+      reporter: ['text', 'json', 'json-summary', 'html'],
+      lines: 80,
+      branches: 80,
+      functions: 80,
+      statements: 80
+    },
+  },
+});