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Por que desenvolvedores devem aprender HTML5, o que isso implica no seu dia a dia
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YAPC::Brasil - 2011
HTML5,
e eu com isso?
“Uma novidade só é conhecida, verdadeiramente, quando as pessoas certas ouvem falar dela”
– Renato Alexandre dos Santos Freitas
Marcio Ferreira@_marcioferreira
Agenda
● it's my life
● HTML4, camada
● insights HTML5
● semântica
● multímidia
● offline – cache, persistência chave/valor
● API js – websockets, web workers, geo, history
my life → 4, camada → insights → semântica → multímidia → offline → API js
my life → 4, camada → insights → semântica → multímidia → offline → API js
+
my life → 4, camada → insights → semântica → multímidia → offline → API js
● HTML Document Representation - Character sets, character encodings, and entities
● Basic HTML data types - Character data, colors, lengths, URIs, content types, etc.
● The global structure of an HTML document - The HEAD and BODY of a document
● Language information and text direction - International considerations for text
● Text - Paragraphs, Lines, and Phrases
● Lists - Unordered, Ordered, and Definition Lists
● Tables
● Links - Hypertext and Media-Independent Links
● Objects, Images, and Applets
● Alignment, font styles, and horizontal rules
● Frames - Multi-view presentation of documents
● Forms - User-input Forms: Text Fields, Buttons, Menus, and more
● Scripts - Animated Documents and Smart Forms
● SGML reference information for HTML - Formal definition of HTML and validation
● Document Type Definition
● Transitional Document Type Definition
● Frameset Document Type Definition
● Character entity references in HTML 4
● Style Sheets - Adding style to HTML documents
my life → 4, camada → insights → semântica → multímidia → offline → API js
text, multimedia, and hyperlink
goal of making the Web truly World Wide
my life → 4, camada → insights → semântica → multímidia → offline → API js
HTML4
HTML – conteúdo
CSS 1, 2.1 – formatação
Javascript – eventos usuário
my life → 4, camada → insights → semântica → multímidia → offline → API js
HTML5
new features are introduced to help Web application authors, new elements are introduced based on research into prevailing authoring practices, and special attention has been given to defining clear conformance criteria for user agents in an effort to improve interoperability.
my life →4, camada → insights → semântica → multímidia → offline → API js
my life →4, camada →insights→ semântica → multímidia → offline → API js
<!DOCTYPE html>
● header● nav● section● article● aside● footer● figcaption● figure● hgroup● mark
my life →4, camada →insights→ semântica → multímidia → offline → API js
<input>
● attributes● autocomplete● action● pattern - regex● multiple - list● formnovalidate● min/max/step
● type● email● url● date/datetime/datetime-local/month/week/time● range/number
crawler – hoje (baseado em xpath - id, class, position, etc -, se o mesmo mudar...)
$html->findnodes( '//div/p/p[1] | //div/p/font[1] | //div/p/...' ); #sintática
crawler – amanhã (baseado na semantica das tags - não mais id, class, position)
$html->section->article->header; #semântica
$html->section->article->figcaption; #semântica
my life →4, camada →insights→ semântica → multímidia → offline → API js
my life →4, camada →insights→ semântica → multímidia → offline → API js
<video>, <audio>
● autoplay● controls● loop● muted● preload● src
cache
<html manifest="myapp.manifest"> onde armazenar se offline
CACHE MANIFEST
CACHE: arquivos que desejo obter cache se offline
index.html
FALLBACK:
page.html fallback-page.html requisição para page.html usa cache de fallback-page.html
NETWORK: quem não deve se obter cache
*
my life →4, camada →insights→ semântica → multímidia → offline → API js
cacheApplicationCache
<body onload="updateIndiktor()" ononline="updateIndiktor()" onoffline="updateIndiktor()">
navigator.onLine ? 'online' : 'offline';
my life →4, camada →insights→ semântica → multímidia → offline → API js
persistência chave/valor● document.cookie morreu
● Web storage● SessionStorage janela / LocalStorage persiste
– sessionStorage.setItem("evento", "YAPC::Brasil")
– sessionStorage.getItem("evento")
– RemoveItem('evento')
– clear()
– return string!var edition = { number: 2011 };
sessionStorage.setItem("edition", JSON.stringify(edition) );var _edition = JSON.parse(sessionStorage.getItem("edition"));
my life →4, camada →insights→ semântica → multímidia → offline → API js
document.cookie
Web storage
SessionStorage janela / LocalStorage persiste– sessionStorage.setItem("evento", "YAPC::Brasil")
– sessionStorage.getItem("evento")
– RemoveItem('evento')
– clear()
– return string!var edition = { number: 2011 };
sessionStorage.setItem("edition", JSON.stringify(edition) );
var _edition = JSON.parse(sessionStorage.getItem("edition"));
my life →4, camada →insights→ semântica → multímidia → offline → API js
websocketVar socket = New WebSocket(host)
Socket.onopen, onmessage, onclose
socket.readyState
Socket.Send
Socket.close
my life →4, camada →insights→ semântica → multímidia → offline → API js
web worker
var worker = new Worker("myscript.js");
worker.onmessage
worker.onerror
worker.postMessage
worker.close
my life →4, camada →insights→ semântica → multímidia → offline → API js
geolocationnavigator.geolocation.getCurrentPosition(showpos)
navigator.geolocation.watchPosition(showpos,erropos)
position.coords.latitude,
position.coords.longitude
my life →4, camada →insights→ semântica → multímidia → offline → API js
historygo, back e forward
history.pushState(data,title[,url])
history.replaceState(data,title[,url])
window.onpopstate
my life →4, camada →insights→ semântica → multímidia → offline → API js
?!@#$%&*
YAPC::BrasilHTML5,
E eu com isso?
@_marcioferreira
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