Introduction to Node.JS 8

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1. NodeJS 8.2 ES6-7-8 Features rheza.satria.ta@gmail.com (from Jenius, PT. BTPN)
2. ES 8 ES 7 (ES 2016) ES 6 (ES 2015) ES 5 ES 3 Core features 1997 ~~ 1999 new functions strict mode, json 2009 class, promises, generators, arrow functions, new syntax and concepts … 2015 Exponential (**), array.includes, 2016
5. is a specific term for taking source code written in one language and transforming into another language that has a similar level of abstraction is the general term for taking source code written in one language and transforming into another. "CoffeeScript is to Ruby as TypeScript is to Java/C#/C++." - Luke Hoban
6. - Latest LTS is 6.11.2, and 8.2.1 will be new LTS candidate this year - We call it Node 8 instead of Node v8, because it will lead confusion with javascript engine v8
7. http://node.green/
8. Node.js Core Technical Committee & Collaborators https://github.com/nodejs/CTC
9. Seems easy to execute just passing function as param, but this leads to know problem: Callback hell
10. Good: - Using chainable promise - Clear flow Bad: - Might become difficult when managing complex logic to pass around the data
11. Good: - Understandable API Bad: - Might become difficult when managing complex logic to pass around the data - Need 3rd party “async” library (uh-oh)
12. Good: - Using generator function - Good way to control data flow Bad: - Need 3rd party “co” library (uh-oh)
13. Good: - Using native syntax and implementation - Good way to control data flow Bad: - Need transpiler if want to support NodeJS version 8 / 7.10 and below
15. Node 8 / NPM 5 § --save by default § Autmaticaly create a package-lock.json § npm cache rewrited § You will have to re-download all your package cache § npm fallback automaticaly to cache if no network § -- prefer-offline § -- prefer-online § -- offline § Large package download issue resolved
17. § Platform for building native addons. § Independant from the underlying JavaScript Runtime § API is Application Binary Interface (ABI) stable accross Node.JS § Every native addons will be compatible with § Chrome V8 § ChakraCore (https://github.com/nodejs/node-chakracore/ )
19. async_hooks : nodejs async tracing “tracking the lifetime of asynchronous resources created inside a Node.js application” const async_hooks = require('async_hooks'); const cid = async_hooks.currentId(); const tid = async_hooks.triggerId(); const asyncHook = async_hooks.createHook({ init, before, after, destroy }); asyncHook.enable(); function init(asyncId, type, triggerId, resource) {} function before(asyncId) {} function after(asyncId) {} function destroy(asyncId) {}
20. § URL Standard : https://url.spec.whatwg.org/ § The URL Standard defines URLs, domains, IP addresses, the application/x-www-form- urlencoded format, and their API. § The URL standard takes the following approach towards making URLs fully interoperable import * as urlUtility from 'url'; const myUrl = new urlUtility.URL('/a/path', 'https://example.org/'); console.log(myUrl.toString());
21. function breeze(a: number, callback: (err: any, value?: number) => void) { if (a > 10) { callback(undefined, a * a); } else { callback("a must be greater than 10"); } } const awaitableBreeze = util.promisify(bullshot); § util.promisify() API that allows standard Node.js callback style APIs to be wrapped in a function that returns a Promise § Callback Style : (err, value) => {}
22. - Calling `Buffer(num)` will return zero-filled `Buffer` instance. - Prior Node.JS would return uninitialized memory, which could contain sensitive data - Use `--pending-deprecation` to trigger deprecation warning
23. - Now, every `stream` instance will now inherit a `destroy()` method. - Implementation, can be by inheriting `_destroy` method - Add `_final` method for writable stream
24. TLS: `rejectUnauthorized` option now defaults to `true` Util: `Symbol` keys are now displayed by default when using util.inspect() Util: `toJSON` errors will be thrown when formatting `%j` Others… See 1. https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V8.md 2. https://nodejs.org/en/blog/release/v8.0.0/
26. 1. https://www.slideshare.net/sebastienpertus/nodejs-future-nodejs-8-es-vnext-features 2. https://blog.risingstack.com/event-sourcing-with-examples-node-js-at-scale/ 3. https://nodejs.org/en/blog/release/v8.0.0/ 4. http://node.green/ 5. https://github.com/boingoing/napi_demo 6. https://medium.com/the-node-js-collection/n-api-next-generation-node-js-apis-for-native-modules- 169af5235b06 7. https://www.youtube.com/watch?v=nmXhJ88nZsk
27. Send CV to: muhammad.ta@btpn.com