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
Um futuro chamado Web Components
Search
Zeno Rocha
August 22, 2013
Programming
26k
47
Share
Um futuro chamado Web Components
BrazilJS 2013
Zeno Rocha
August 22, 2013
More Decks by Zeno Rocha
See All by Zeno Rocha
The Next Generation of Developer-First Products
zenorocha
1
710
7 Habits of Highly Productive Developers
zenorocha
1
440
7 Hábitos de Desenvolvedores Altamente Produtivos
zenorocha
1
570
What's new in the Liferay Community
zenorocha
0
740
Launching Liferay Projects Faster with WeDeploy
zenorocha
1
610
How Liferay fits into the real of latest technologies
zenorocha
0
680
Estoicismo e JavaScript
zenorocha
3
1.2k
Por que ninguém se importa com seu novo projeto open source?
zenorocha
2
1.2k
Como investir em... você!
zenorocha
1
620
Other Decks in Programming
See All in Programming
ユニットテストの先へ:テスト技法で要求・仕様を整理するJava開発実践 / Beyond_Unit_Testing_Practical_Java_Development_Techniques_for_Organizing_Requirements_and_Specifications
shimashima35
0
340
TSKaigi 2026 TypeScriptバックエンドのオブザーバビリティ戦略 — Datadog × NestJSの実践
taiseiyamamotoan
2
270
運用エージェントは "作る" から "育てる" へ - 記憶と自己進化の3層設計パターン / self-evolving-agents-three-layer-agent-design
gawa
12
3.4k
Swiftのレキシカルスコープ管理
kntkymt
0
210
dRuby over BLE
makicamel
2
300
These Five Tricks Can Make Your Apps Greener, Cheaper, & Nicer
hollycummins
0
270
TypeScriptだけでAIエージェントを作る フロント・エージェント・インフラのフルスタック実践
har1101
6
1.3k
Claspは野良GASの夢をみるか
takter00
0
160
JJUG CCC 2026 Spring: JSpecify で実現する Kotlin フレンドリーな Java API 設計
ternbusty
1
130
LLM Plugin for Node-REDの利用方法と開発について
404background
0
160
Lessons from Spec-Driven Development
simas
PRO
0
130
Spec Driven Development | AI Summit Lisbon
danielsogl
PRO
0
130
Featured
See All Featured
Conquering PDFs: document understanding beyond plain text
inesmontani
PRO
4
2.8k
Applied NLP in the Age of Generative AI
inesmontani
PRO
4
2.3k
Producing Creativity
orderedlist
PRO
348
40k
First, design no harm
axbom
PRO
2
1.2k
The Cult of Friendly URLs
andyhume
79
6.9k
Building a Modern Day E-commerce SEO Strategy
aleyda
45
9.1k
Building Applications with DynamoDB
mza
96
7.1k
Done Done
chrislema
186
16k
Git: the NoSQL Database
bkeepers
PRO
432
67k
技術選定の審美眼(2025年版) / Understanding the Spiral of Technologies 2025 edition
twada
PRO
118
120k
A Modern Web Designer's Workflow
chriscoyier
698
190k
From π to Pie charts
rasagy
0
200
Transcript
<web components> um futuro chamado @zenorocha
@liferay @alloyui
None
None
None
jqueryboilerplate.com
browserdiet.com
None
os projetos mais populares voltados para client-side estão fadados a
morrer
vs <canvas>
document.querySelector vs
vs <input type=”date”>
então quer dizer que tudo vai virar “nativo” um dia?
o que as principais empresas da web estão trabalhando hoje?
None
getbootstrap.com
None
facebook.github.io/react
None
topcoat.io
None
alloyui.com
None
purecss.io
None
None
None
como usar um “componente” hoje?
1. Nunca crie! Use um plugin jQuery
2. Copie e cole o código de alguém
3. Torça pra que funcione
Web Components
<braziljs> braziljs.github.io/braziljs-element
<video is=”camera”> customelements.github.io/camera-element
Web Components Custom Elements Import Templates Shadow DOM Decorators*
Custom Elements
<element name="braziljs" constructor="BrazilJS" attributes="onde"> // implementação </element> <element>
<element name="camera" extends="video"> // implementação </element> <element>
zno.io/QxNJ
<brazil-js></brazil-js> usando JS var proto = Object.create(HTMLElement.prototype); proto.createdCallback = function()
{ this.textContent = 'BrazilJS!'; }; document.register('brazil-js', { prototype: proto });
lifecycle •createdCallback •enteredDocumentCallback •leftDocumentCallback •attributeChangedCallback
x-tags.org
polymer-project.org
<polymer-element name="braziljs" attributes="onde"> <script> Polymer('braziljs', { onde: 'Porto Alegre', created:
function() { // faça algo } }); </script> </polymer-element> como usar?
zno.io/QxlZ
Templates
Templates são blocos reutilizáveis de código
server-side mustache handlebars liquid jinja velocity savant
client-side mustache handlebars eco ejs jade hogan
gambiarra #1 <div id="template" style="display: none"> <img src="logo.png" class="logo.png"> </div>
<script id="template" type="text/x-handlebars-template"> <img src="logo.png"> </script> gambiarra #2
<template>
<template id="meuTemplate"> <img src=""> </template> como criar?
// 1. Acessa o conteúdo do template var t =
document.querySelector('#meuTemplate').content; // 2. Manipula elemento interno do template t.querySelector('img').src = 'logo.png'; // 3. Clona e insere no DOM document.body.appendChild(t.cloneNode(true)); como usar?
Shadow DOM
Shadow DOM esconde os detalhes de implementação
mas e o <iframe>?
do que é feito um <video>? ou um password, textarea,
date?
como usar? <h1>Documento</h1> <div id=”cuia”></div> var cuia = document.querySelector('#cuia') .createShadowRoot();
cuia.innerHTML = '<h1>Mate</h1>';
estilo, marcação e script encapsulados <h1>Documento</h1> <div id=”cuia”></div> var cuia
= document.querySelector('#cuia') .createShadowRoot(); cuia.innerHTML = '<h1>Mate</h1>' + '<style>h1 { color: #f00; }</style>';
como ativar?
Import
None
None
None
None
como usar? <link rel="import" href="braziljs.html">
None
jonrimmer.github.io/are-we-componentized-yet
Flags
quero usar hoje, onde eu encontro? NPM? Bower?
@eduardolundgren
@bernarddeluna
customelements.io
<twitter> customelements.github.io/twitter-element
<gmaps> customelements.github.io/gmaps-element
<video is=”camera”> customelements.github.io/camera-element
<video is=”tracking”> eduardolundgren.github.io/tracking-element
ou seja...
encapsulamento e reaproveitamento de código de verdade
A melhor forma de prever o futuro é inventando ele
e..... camisetas!
None