typescript setup example

package.json

{
  "name": "typescript-setup",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "compile": "tsc",
    "test": "node -r esm ./spec.js",
    "dev": "npm run compile -- -w"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "esm": "^3.2.25",
    "typescript": "^3.6.3",
    "zora": "^3.0.3"
  }
}

spec.ts

import {test} from 'zora';
import square from './square';

test(`some test passing test`, t => {
    t.eq(square(2), 4, `2 * 2 = 4`);
});

test(`some failing test`, t => {
    t.eq(square(3), 8, `3 * 3 = 9`);
});

square.ts

export default (x: number): number => x ** 2;

tsconfig.json

{
  "compilerOptions": {
    "lib": [
      "esnext",
      "dom"
    ],
    "module": "esnext",
    "moduleResolution": "node",
    "target": "esnext",
    "sourceMap": true,
    "esModuleInterop": true
  },
  "exclude": [
    "./node_modules"
  ]
}