console.log("Welcome To Node Master")

// fileread.js
import { readFileSync } from "fs";
const content = readFileSync("myfile.txt");
console.log(content);

node fileread.js

--experimental-permission

node --experimental-permission fileread.js

node --experimental-permission fileread.js                    
node:internal/modules/cjs/loader:178
  const result = internalModuleStat(filename);
                 ^

Error: Access to this API has been restricted
    at node:internal/main/run_main_module:23:47 {
  code: 'ERR_ACCESS_DENIED',
  permission: 'FileSystemRead',
  resource: '/home/imanhpr/Desktop/sandbox/nod/fileread.js'
}
Node.js v20.9.0

node --experimental-permission --allow-fs-read='*' fileread.js 

export function sum(input) {
  return input + 2;
}

export function minus(input) {
  return input - 2;
}

import assert from "assert";
import { describe, test } from "node:test";
import { sum } from "../main.js";

describe("Check Sum Function.", () => {
  test("Sum 2 + 2 = 4", () => {
    const result = sum(2);
    assert.strictEqual(result, 4);
  });
  test("Sum 4 + 2 == 6", () => {
    const result = sum(4);
    assert.strictEqual(result, 3);
  });
});

--test

node --test

 --experimental-test-coverage 

node --test --experimental-test-coverage