Official release address: https://nodejs.org/en/blog/release/v18.0.0/

1. Native support for fetch

const res = await fetch('https://nodejs.org/api/documentation.json');
if (res.ok) { 
  const data = await res.json(); 
  console.log(data); 
}

Experimental fetch API is supported in Node's global environment. The implementation is based on undici, an HTTP/1.1 client written for Node.

At the same time, Node can now use the following global variables: fetch, FormData, Headers, Request and Response.

2. Built-in test runner

import test from 'node:test'; 
import * as assert from 'assert/strict'; 

test('sync test', (t) => { 
  assert.equal(1, 1); 
  }
); 
  
test('async test', async (t) => { 
  assert.equal(1, 1); 
  }
);

3. Web Streams

Node download supports Web Streams API (MDN), which means Node can allow JavaScript to programmatically access data streams received over the network through the Streams API.

4. Blob

buffer adds Blob API. Blob encapsulates immutable raw data and can safely share these data among multiple worker threads.

Additionally, the new BroadcastChannel instance allows asynchronous one-to-many communication with all other BroadcastChannel instances bound to the same channel name.

5. Using V8 The new version of

V8 will be updated to version 10.1, which is part of Chromium 101. Compared to Node.JS 17.9.0, the following new features are included:

• findLast() and findlastedex() array methods.
• Improvements to the Intl.Locale API.
• Intl.SupportedValues ​​of the function.
• Improved performance of class fields and private class methods (they are now initialized as fast as normal property stores).

6. Support import JSON

The Import Assertions proposal adds inline syntax to module import statements. The purpose of such assertions is to support other types of modules in a common way across JavaScript environments, starting with JSON modules.

The syntax is as follows (the recommended way to import the JSON module):

import json from "./foo.json" assert { type: "json" };
import("foo.json", { assert: { type: "json" } });

For more features

at the end,