TC39 meeting in March; new Node.js features; Locale-aware sorting; built-in test runner for Node.js; supply chain security

• Stage 1: type annotations; Function.prototype.once
• Stage 2: decorator metadata
• Stage 3: Unicode sequence properties for RegExps; character class set operations (union, subtraction, etc.) for RegExps; non-destructive Array methods (.toReversed(), .toSorted(), .toSpliced(), .with()); decorators (excluding metadata)

• Deeply copying values via structuredClone()
• Various AbortSignal features
• Built-in fetch()
• Importing JSON files
• More Promise-based APIs

import test from 'node:test';
import * as assert from 'assert/strict';
test('synchronous test', (t) => {
  assert.equal(1, 1);
});
test('asynchronous test', async (t) => {
  assert.equal(1, 1);
});