Bun v1.2.13

// Share data between workers with environmentData
import {
  Worker,
  getEnvironmentData,
  setEnvironmentData,
} from "node:worker_threads";

// Set data in parent thread
setEnvironmentData("config", { timeout: 1000 });

// Create a worker
const worker = new Worker("./worker.js");

// In worker.js:
import { getEnvironmentData } from "node:worker_threads";
const config = getEnvironmentData("config");
console.log(config.timeout); // 1000

import { Worker } from "node:worker_threads";

// Listen for the 'worker' event on process
process.on("worker", (worker) => {
  console.log(`New worker created with id: ${worker.threadId}`);
});

const worker = new Worker("./worker.js");

import { createServer } from "net";

// Now works correctly
const server = createServer();
server.listen("3000", () => {
  console.log("Server listening on port " + server.address().port);
});

// On Windows, better error detection and path preservation
import { mkdirSync } from "fs";

const path = mkdirSync("C:\\path\\to\\directory", { recursive: true });
console.log(path);
// Previously outputted C:\path. Now, outputs \\?\C:\path

// Preserves the function name
const promisified = util.promisify(fs.readFile);
console.log(promisified.name); // readFile

// Now shows proper warnings when promisifying a function that returns a Promise
const util = require("node:util");
const asyncFn = async () => "result";
const promisified = util.promisify(asyncFn);
// Warning: Calling promisify on a function that returns a Promise is likely a mistake.

// Create a DOMException with name and cause
const error = new DOMException("Something went wrong", {
  name: "CustomError",
  cause: new Error("Underlying cause"),
});

console.log(error.name); // "CustomError"
console.log(error.cause); // Error: Underlying cause

// Disable native addons at runtime
bun --no-addons app.js

process.dlopen(module, "addon.node");
// error: Cannot load native addon because loading addons is disabled.
// code: "ERR_DLOPEN_DISABLED"

// Packages can use the "node-addons" export condition
// for conditional exports when addons are enabled/disabled

test("inline snapshots", () => {
  expect([1, 2]).toMatchInlineSnapshot(`
    [
      1,
      2,
    ]
  `);
});

// Even if your .npmrc has a UTF-16 BOM marker, Bun will now parse it correctly
// ~/.npmrc with UTF-16 BOM
registry=https://registry.npmjs.org/

// Improved helper function for inserting objects
const user = { name: "John", age: 30 };
await sql`INSERT INTO users ${sql(user)} RETURNING *`;

// The types for this overload are now functional
await sql`INSERT INTO users ${sql(user, "name")} RETURNING *`;

// You can also specify column names with arrays of objects
const usersToInsert = [
  { name: "Bob", age: 30 },
  { name: "Alice", age: 25 },
];
await sql`INSERT INTO users ${sql(usersToInsert, "name")} RETURNING *`;

// You can still pass arrays
await sql`SELECT * FROM users WHERE id IN ${sql([1, 2, 3])}`;

import { redis } from "bun";
const buffer = await redis.getBuffer(key);
buffer; // => Uint8Array | null

// This would previously leak memory
for (let i = 0; i < 1000; i++) {
  const child = Bun.spawn({
    cmd: ["bun", "worker.js"],
    ipc: () => {},
  });
  child.send({ data: "some message" });
  await child.exited;
}