html5 & the today of the web
Post on 04-Apr-2018
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TRANSCRIPT
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Hello. We are John
and Nathan. Here isa bit of background
about each of us...
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Master of Divinity
Asbury Theological Seminary
John Dyer
Nathan Smith
Master of Theology
Dallas Theological Seminary
+=
= +Desktop OS = Windows
Desktop OS = Mac
Mobile = iOS
Mobile = Android
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What we have in common: Weare both web developers who
want to see the “Big-C” churchbetter utilize web technologies.
We also both♥ JavaScript :)
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So, what is HTML5? It is thenewest version of HTML. But
also a phrase for everythingcool + new on the web. Not
all that’s labeled HTML5 *is*HTML5. But that’s okay...
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New Hotness!HTML5 + CSS3 + JavaScript
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http://slidepdf.com/reader/full/html5-the-today-of-the-web 7/71http://www.apple.com/html5/
Apple likes HTML5
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Google likes HTML5
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Mozilla (Firefox) likes HTML5
https://developer.mozilla.org/en/HTML/HTML5
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Opera likes HTML5
http://www.opera.com/docs/specs/presto25/html5/
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Last (but not least) – Microsoft likes HTML5
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HTML5is terse
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HTML5 <!DOCTYPE html>
XHTML 1.0 Transitional <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML1.0 Transitional//EN" "http://www.w3.org/
TR/xhtml1/DTD/xhtml1-transitional.dtd">
Simplified doctype declaration
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HTML5 <script>
// Code here. </script>
XHTML 1.0 Transitional <script type="text/javascript">
/* <![CDATA[ */
// Code here./* ]]> */ </script>
Simplified JavaScript embedding
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HTML5 <style>
// Code here. </style>
XHTML 1.0 Transitional <style type="text/css">
// Code here. </style>
Simplified embedded styles
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HTML5 <link rel="stylesheet" href="file.css" />
XHTML 1.0 Transitional <link rel="stylesheet" href="file.css"type="text/css" media="all" />
Simplified stylesheet linking
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New tagsin HTML5
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<header>
<footer>
<aside>
<nav>
<div class=”content”>
<article>
<section>
<hgroup>
<section>
<dialog>
<p>
etc...
<figure>
<figcaption>
<img />
<details>
<summary>
<p>
etc...
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But the aforementioned tags
don’t work well in InternetExplorer (IE8 and older).
To make IE behave, youcan use an “HTML5 shim”
JavaScript library...
code.google.com/p/html5shim
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... but this requires extra code and adds a bit
of fragility to your site (IE breaks w/ JS off).
The up-side is improved semantic richness. In
practicality though, there are not (yet) anytangible SEO or accessibility gains to be had.
Given the trade-offs involved, and lack oftangible benefit, we’d recommend continuing
to use <div> with “HTML5” class names...
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<div class=”header”>
<div class=”footer”>
<div class=”aside”>
<div class=”nav”>
<div class=”content”>
<div class=”article”>
<div class=”section”>
<div class=”hgroup”>
<div class=”section”>
<div class=”dialog”>
<p>
etc...
<div class=”figure”>
<div class=”figcaption”>
<img />
<div class=”details”>
<div class=”summary”>
<p>
etc...
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... that way, you are writing code with the
“semantics” of the new HTML5 tags, without
the headaches of worrying about legacy
browser support. Then, one great day when
IE8 no longer has significant market-share,you can “flip the switch” so to speak.
Now that we’ve got those tags out of theway, let’s talk about the fun parts of HTML5.
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<canvas>+ <svg>Though SVG (Scalable Vector Graphics)
pre-dates HTML5, it is finally viable now
that IE9 supports it. This means all major
browsers will support SVG and canvas.
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We won’t cover <svg> or <canvas> in
detail during this talk, but two helpful
JavaScript libraries are worth noting...Raphaël (SVG) – Dmitry Baranovskiy Processing JS (Canvas) – John Resig
http://www.raphaeljs.com/ http://www.processingjs.org/
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SVG is like construction paper. Layers retaindistinct shapes. SVG files can live without JS.
http://www.flickr.com/photos/124330160/2127121118/
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Canvas is like a whiteboard drawing. No layers.Note: Canvas only works in the browser via JS.
http://www.flickr.com/photos/azuriblue/3350954960/
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Canvas demos – ChromeExperiments.com
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New <form> elements
<select><option> ...
<textarea></textarea> <input type="checkbox" /> <input type="file" /> <input type="radio" /> <input type="text" />
... etc. <input type="date" /> <input type="datetime" /> <input type="email" /> <input type="month" /> <input type="number" /> <input type="range" /> <input type="tel" /> <input type="time" />
<input type="url" />
HTML4,XHTML(and HTML5)
New inHTML5
All f l O
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All form elements – in Opera
Ad HTML5 k b d b l d
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http://www.diveintohtml5.org/forms.html
Adaptive HTML5 keyboards on mobile devices
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HTML5“Apps”
E l S C d
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Example – ScrumCards.net
iOS – Home screen app icon.
<link rel=”apple-touch-icon” />
iOS – No browser chrome.
Status bar color can be set.
Android – Browser chrome
always present. Caching only.
M ki HTML5 “ ” i
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Making an HTML5 “app” is pretty easy
* if l fil ffli
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*.manifest lets you store files offline
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http://www.sencha.com/products/touch/
Ph G h l HTML5 “ ti ”
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http://www.phonegap.com/
PhoneGap helps HTML5 power “native” apps
HTML5’ ( i t l) J S i t API
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HTML5’s (experimental) JavaScript APIs
Desktop Features – Drag and drop – Live notifications
Browser Database – Web SQL – IndexedDB
Much Much More!
– document.querySelector – Geolocation
– localStorage – Web workers
Cool! But not(yet) ready for
prime-time.
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<video>How do we make
it work reliably?
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Flash was the mostreliable way to play
video on the web.
Roughly 99% of
all desktops haveFlash player.
iPhone/iPad don’t.
They do supportHTML5 <video>
http://www.apple.com/hotnews/thoughts-on-flash/
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H.264 = MoneyFiguratively + Literally... It’s themost widely supported format.
But licensing costs browsermakers $5 million a year.
http://www.readwriteweb.com/archives/will_idealism_be_firefoxs_downfall.php
H 264 support in the “Big 5”
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Internet Explorer 9 Google Chrome Safari
Firefox Opera
H.264 support in the Big-5
YES
NO
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Ogg = “Ugh!”Nobody wants to re-encodecountless hours of video so
Firefox & Opera can play it.– And have it look sub-par.
http://www.xiph.org/ogg/
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WebM/VP8From: Google, Mozilla, Adobe.Looks great. Is open source.
IE9 is on the fence. It doesn’t(yet) work on mobile devices.
http://www.webmproject.org/
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1 file to rule them all...
H.264 via HTML5 with a fallback to Flash or Silverlight (playing the
same file) if the browser cannot
play H.264 natively via <video>.
http://www.mediaelementjs.com/
Native <video> UI controls
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Native <video> UI controls
OPERA
SAFARI
FIREFOX
CHROME
IE9
http://dev.opera.com/articles/view/custom-html5-video-player-with-css3-and-jquery/
CSS styled video controls MediaElementJS com
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CSS styled video controls – MediaElementJS.com
JavaScript <video> libraries
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JavaScript <video> libraries
– videojs.com – projekktor.com
– jwplayer.com – jilion.com/sublime/video
– mediaelementjs.com
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CSS3not HTML5but is still
awesome
CSS3 gradients
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.gradient { background: #eee url(gradient.png) repeat-x;
background: -webkit-gradient(linear, left top,left bottom,color-stop(0, #fff),color-stop(1, #eee));
background: -moz-linear-gradient(top center,#fff 0%,#eee 100%);
}
CSS3 gradients
The first declaration works in all browsers. The second is for
Safari and Google Chrome, which both use the WebKitrendering engine. The last is for Firefox (Mozilla prefix).
Tip: Crop gradient images from a screenshot of a CSS3page render. Ensures visual consistency and saves work.
westciv com/tools/gradients
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westciv.com/tools/gradients
CSS3 box-shadow
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.drop_shadow {
-webkit-box-shadow: rgba(0, 0, 0, 0.5) 0 2px 5px;
-moz-box-shadow: rgba(0, 0, 0, 0.5) 0 2px 5px;
box-shadow: rgba(0, 0, 0, 0.5) 0 2px 5px;
}
CSS3 box-shadow
The first declaration is for Safari and Chrome. The second isfor Firefox. The third is for all browsers, which will eventuallysupport box-shadow without a prefix.
Currently: Opera and IE9 support it.
CSS3 border-radius
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.rounded_corners {
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
}
CSS3 border-radius
The first line is for Safari and Chrome. Second is for Firefox.The third is for all browsers, which will eventually supportborder-radius without a prefix. Currently: Opera and IE9.
More border-radius code here:gist.github.com/262663
CSS3 text-shadow
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.text_shadow {text-shadow: rgba(0, 0, 0, 0.5) 0 1px 1px;
}
CSS3 text-shadow
Thankfully, all browsers that support text-shadow do so withthe exact same syntax: Chrome, Safari, Firefox, Opera.
– No word from IE9 yet.
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@font-faceTimes + Helveticahave a posse
Common fonts on Windows + Mac
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Common fonts on Windows + Mac
Times
Georgia
Arial -or-
Helvetica
Courier
Palatino
Comic Sans
Trebuchet
Verdana
... etc.
http://www.ampsoft.net/webdesign-l/WindowsMacFonts.html
How can we use non-common fonts?
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How can we use non common fonts?
Flat images: It works. But hard to maintain.
sIFR: Pretty. Uses Flash. Fails on iPhone/iPad.
Can be affected by ad-blocking extensions.
Cufón: Better. Uses JavaScript + <canvas>.
But can be intensive. Best used on headlines.
@font-face: No scripting. Pure CSS. Can be
used for any text. Yet tricky to implement.
Paul Irish’s “Bulletproof @font-face syntax”
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Paul Irish s Bulletproof @font face syntax
http://paulirish.com/2009/bulletproof-font-face-implementation-syntax/
@font-face
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@font face
@font-face {font-family: 'GentiumRegular';
src: url('genr102_0-webfont.eot');src: local('☺'), url('genr102_0-webfont.woff') format('woff'), url('genr102_0-webfont.ttf') format('truetype'),url('genr102_0-webfont.svg#webfontX7s0ZYjS') format('svg');
}
p {
font-family: 'GentiumRegular';}
File generatorfontsquirrel.com/fontface/generator
Google fonts API (super easy)code.google.com/webfonts
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Bible Web App
HTML5 + CSS3 + @font-face
biblewebapp.com
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“Slablet”
HTML5 + CSS3 + JavaScript
host.sonspring.com/slablet
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Social “Graph”Cool! But who owns your data?
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Lots of standards and
protocols that aren't really
being used right now.
Facebook “Like”: not open,
social, or graphic. But funand gives advertisers data.
Helpful tool for adding “Like” buttons
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http://www.openlike.org/
p g
Open social data – A cautionary tale...
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p y
http://www.youropenbook.org/
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HTML5 Resources – alistapart.com/articles/get-ready-for-html-5
– dev.w3.org/html5/spec/Overview.html
– diveintohtml5.org – html5.org
– html5demos.com
– html5doctor.com
– sencha.com/products/touch
– w3schools.com/html5
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CSS3 Resources – border-radius.com
– code.google.com/webfonts
– css3.info
– css3generator.com
– css3please.com
– fontsquirrel.com
– modernizr.com – w3.org/Style/CSS/current-work
– westciv.com/tools
slideshare.net/nathansmith/echo-html5
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Questions?John Dyer
– twitter.com/ johndyer – johndyer.name
Nathan Smith – twitter.com/nathansmith – sonspring.com