Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
The future of JavaScript
Search
dherman
September 27, 2011
Programming
2.5k
6
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
The future of JavaScript
I've seen the future of JavaScript, and it's AMAZING
dherman
September 27, 2011
More Decks by dherman
See All by dherman
Rust + Node = Neon
dherman
1
380
Evolving the World's Most Popular Programming Language
dherman
0
720
Closing iterators
dherman
0
840
A better future for comprehensions
dherman
0
2.1k
Evolution is Awesome
dherman
0
680
Status Report: ES6 Modules
dherman
16
4.1k
Discussion with TC39 about the semantics of symbols
dherman
1
450
September 2013 Modules Status Update
dherman
2
1.4k
Rust: low-level programming without the segfaults
dherman
13
9.1k
Other Decks in Programming
See All in Programming
Webフレームワークの ベンチマークについて
yusukebe
0
200
Vue × Nuxt × Oxc どこまで使える?実運用の現在地
andpad
0
370
Haskell/Servantを通してWebミドルウェアを捉え直す
pizzacat83
1
480
なぜ関数型プログラミングで「型」と「証明」が語られるのか #fp_matsuri
kajitack
3
800
霧の中の代数的エフェクト
funnyycat
1
340
Contextとはなにか
chiroruxx
1
390
AI駆動開発を妨げる技術的負債の解消アプローチ / ai-refactoring-approach
minodriven
17
8.9k
技術記事、 専門家としてのプログラマ、 言語化
mizchi
14
7.4k
信頼性について考えてみる(SRE NEXT 2026 miniLT)
hayama17
0
160
コンテキストの使い捨てをやめる — ビジネスルール駆動開発と miko —
ioki
0
270
フィードバックで育てるAI開発
kotaminato
1
110
AIエージェントで 変わるAndroid開発環境
takahirom
2
490
Featured
See All Featured
Gemini Prompt Engineering: Practical Techniques for Tangible AI Outcomes
mfonobong
2
460
DBのスキルで生き残る技術 - AI時代におけるテーブル設計の勘所
soudai
PRO
67
56k
Facilitating Awesome Meetings
lara
57
7k
Context Engineering - Making Every Token Count
addyosmani
9
1k
B2B Lead Gen: Tactics, Traps & Triumph
marketingsoph
0
170
Documentation Writing (for coders)
carmenintech
77
5.4k
Leadership Guide Workshop - DevTernity 2021
reverentgeek
1
320
Testing 201, or: Great Expectations
jmmastey
46
8.2k
16th Malabo Montpellier Forum Presentation
akademiya2063
PRO
0
190
The Curious Case for Waylosing
cassininazir
1
430
The Spectacular Lies of Maps
axbom
PRO
1
850
Taking LLMs out of the black box: A practical guide to human-in-the-loop distillation
inesmontani
PRO
3
2.3k
Transcript
I HAVE SEEN THE FUTURE OF JAVASCRIPT AND IT’S AMAZING
Hi, I’m dherman @littlecalculist
I — JavaScript and I love the language it almost
is...
None
None
POWER
Bits, bytes and blobs binary file and network I/O
var Point2D = new StructType({ x: uint32,
y: uint32 }); var Color = new StructType({ r: uint8, g: uint8, b: uint8 });
var Pixel = new StructType({ point: Point2D,
color: Color }); var Triangle = new ArrayType(Pixel, 3);
new Triangle([ { point: { x: 0,
y: 0 }, color: { r: 255, g: 255, b: 255 } }, { point: { x: 5, y: 5 }, color: { r: 128, g: 0, b: 0 } }, { point: { x: 10, y: 0 }, color: { r: 0, g: 0, b: 128 } } ])
Keep off my property private names
function Container() { var secret = 3;
this.service = function() { if (secret-‐-‐) { ... } }; }
var key = Name.create("secret"); function Container() { this[key] = 3
} Container.prototype = { service: function() { if (this[key]-‐-‐) { ... } } };
var markers = new WeakMap(); var tile = new Tile(...);
var results = [...]; tiles.set(tile, results);
var obj = Proxy.create({ get: function(...) {
... }, set: function(...) { ... }, delete: function(...) { ... }, ... }, proto);
Callbacks: the new goto? (well, no, but... still.)
Pour 1/2 cup water into pan. When you’re done: Bring
water to boil. When that’s done: Lower heat and add rice. After 15 minutes: Turn off heat and serve.
pan.pourWater(function() { range.bringToBoil(function() {
range.lowerHeat(function() { pan.addRice(function() { setTimeout(function() { range.turnOff(); serve(); }, 15 * 60 * 1000); }); }); }); });
pan.pourWater(function() { range.bringToBoil(function() {
range.lowerHeat(function() { pan.addRice(function() { setTimeout(function() { range.turnOff(); serve(); }, 15 * 60 * 1000); }); }); }); }); pyramid of doom
generators a.k.a. coroutines a.k.a. Interruptible functions
function* g() { yield 1;
yield 2; } var obj = g(); obj.next(); // 1 obj.next(); // 2
var task = new Task(function*() { var
text = yield XHR("file.txt"); yield timeout(1000); status.innerHTML = text; }); task.start();
Great languages deserve great libraries and that means modules
None
browser <script></script>
var Collections = (function() { function Dictionary()
{ ... } return { Dictionary: Dictionary }; })();
“The human compiler, at work.” — Paul Graham
module Collections { export function Dictionary() {
... } }
import { $ } from "jquery.js"; import { map, each
} from "underscore.js";
import { $ } from "jquery.js"; import { map, each
} from "underscore.js"; loaded once, before execution
Expressiveness artwork credit: sam flores
Death of a thousand cuts typeof null === "object" //
wtfjs? arguments isn’t an Array #$@?! var hoisting
function f(i, j, ...rest) { return rest.slice(i,
j); }
array.push(thing1, thing2, ...moarThings); var shape = new Shape(...points);
function img(src, width=320, height=240) { ... }
for (i = 0; i < a.length; i++) {
let x = a[i]; x.onclick = function() { x.toggle() }; }
for (i = 0; i < a.length; i++) {
let x = a[i]; x.onclick = function() { x.toggle() }; } block scoped
var { r, g, b } = thing.color; var [x,
y] = circle.center; [a, b] = [b, a];
var obj = { foo: "foo",
bar() { return this.foo }, [getName()]: 17 };
for (x in [3, 4, 5])
// 0, 1, 2 (d’oh) for (x of [3, 4, 5]) // 3, 4, 5 for (x of keys(o)) // keys in o for (x of values(o)) // values of o for ([k, v] of items(o)) // props of o
import iterate from "@iter"; obj[iterate] = function() {
return { next: function() { ... } } } for (x of obj) { ... }
[ x * y for (x of obj1) for (y
of obj2) ]
"<p>\nohai, " + firstName + " " + lastName +
"\n</p>"
`<p> ohai, ${firstName} ${lastName} </p>`
safeHTML`<p> ohai, ${firstName} ${lastName} </p>`
How soon is now?
We (Ecma) are working hard and fast on the spec.
We (vendors) will ship features before the spec is done. Transpilers as language shims: Traceur, Narcissus
None