HTML5 and CSS3 Techniques You Can Use Today

HTML5 and CSS3 Techniques You Can Use Today
Todd Anglin Chief Evangelist, Telerik Microsoft MVP ASP Insider President NHDNUG & O’Reilly Author @toddanglin TelerikWatch.com
• Complete development toolbox provider UI • ASP.NET • MVC • WinForms • Silverlight • WPF Tools • Reporting • ORM • JustCode • CMS Testing • WebUI Test Studio • JustMock Project • TeamPulse • TFS WIM • TFS PD www.telerik.com
HTML5 Techniques CSS3 Techniques Practical Tips Goal: Leave with at least 1 HTML5/CSS3 technique you can use today
“While it continues to serve as a rough guide to many of the core features of HTML, it does not provide enough information to build implementations that interoperate with each other and, more importantly, with a critical mass of deployed content.” -W3C on HTML4
1991 • HTML Tags 1995 • HTML 2 • Later: File uploads, tables 1997 (Jan) • HTML 3.2 (W3C) 1997 (Dec) • HTML 4 • Strict, Trans, Frameset • 1999: 4.01 HTML5: • Addressing modern web applications & pains of the past
1996 • CSS v1 • IE3: First implementation • IE Mac: First 100% support 1997 • CSS v2 • Still ZERO 100% implementations 2007 • CSS v2.1 • Fixed errors in 2.0 spec CSS: Plagued by implementation bugs & inconsistencies CSS3 • Improve consistency & power of styling language
• Better, but not perfect Feature Check • CanIUse.com • BrowserScope.org • Html5Test.com Equalizers • Html5Reset.org • Html5Boilerplate.com • jQuery Hacks • JavaScript helpers • “Downlevel” experiences Know your users. Know your browsers.
progressive enhancement graceful degradation
1. Defines a single language called HTML5 which can be written in HTML syntax and in XML syntax. 2. Defines detailed processing models to foster interoperable implementations. 3. Improves markup for documents. 4. Introduces markup and APIs for emerging idioms, such as Web applications.
http://bit.ly/vsHTML5 http://bit.ly/vsSVG Add Intellisense & Schema Validation to Visual Studio editor
• Three options: –Shiv it –Kill it –Target it
• Tags with meaning <body> <div id=“header”> </div> <div id=“content”> <div id=“nav”></div> </div> <div id=“footer”> </div> </body> <body> <header> </header> <section> <nav></nav> </section> <footer></footer> </body> VS. *Need shiv to trigger styling in old IE
• Content with meaning – Machines understand more of your content  <meta name="title" content="Baroo? - cute puppies" /> <meta name="description" content="The cutest canine on the Internet!" /> <link rel="image_src" href="http://example.com/thumbnail_preview.jpg" /> <link rel="video_src" href="http://example.com/video_object.swf?id=12345"/> <meta name="video_height" content="296" /> <meta name="video_width" content="512" /> <meta name="video_type" content="application/x-shockwave-flash" />
• Improved usability – Supported in Safari, Chrome, Opera (so far) <form name="f"> <input id="q" autofocus>  <script> if (!("autofocus" in document.createElement("input"))) { document.getElementById("q").focus(); } </script> <input type="submit" value="Go"> </form>
• data-* – Valid approach to storing data in HTML  <div id="mydiv" data-key="26" data-name="My product name"> This product is an extremely popular choice. </div>  var mydiv=document.getElementById('mydiv') //Using DOM's getAttribute() property var key = mydiv.getAttribute("data-key") //returns "26" //OR Using JavaScript's dataset property** var key = mydiv.dataset.key //returns "26"
Scalable Vector Graphics Canvas Bitmap- output Good for animation JavaScript- based Vector-output Good for interaction XML-based
• CSS Reset – Browsers ship with built-in styles – zero them out! – Enable newer features in older browsers http://html5reset.org http://html5boilerplate.com
•-webkit •-moz •-o •-ms “standard” way browsers implement custom features.
• Biggest Problem? – Licensing! @font-face { font-family: Delicious; src: url('Delicious-Roman.otf') format(“opentype”); } //Usage h3 { font-family: Delicious, sans-serif; }
• Solve the licensing problem • Host the TTF/OTF font files • Provide easy-to-use code http://code.google.com/webfonts http://webfonts.fonts.com http://typekit.com/libraries
• Easy corner control – Expect GD for older browsers (IE) -moz-border-radius: 5px 5px 5px 5px; //Optionally ”explicit” -webkit-border-radius: 5px; border-radius: 5px; //Can also control specific corners border-bottom-left-radius:0px; border-bottom-right-radius:0px;
• Exactly like it sounds – box-shadow: <hShift> <vShift> <size> <color>; -moz-box-shadow: 2px 2px 2px #333; -webkit-box-shadow: 2px 2px 2px #333; box-shadow: 2px 2px 2px #333;
• Uniform across supported browsers! – text-shadow: <h offest> <v offset> <blur size> <color>; text-shadow: 2px 2px 2px #333; //You can apply multiple shadows text-shadow: 2px 2px 2px #333, 2px 2px 3px #CCC;
• More options, more power – multiple backgrounds – resize backgrounds – background clipping /*Background size*/ -webkit-background-size: 137px 50px; -o-background-size: 137px 50px; background-size: 137px 50px; /*Multiple Backgrounds*/ background: url(top.gif) top left no- repeat, url(bottom.gif) bottom left no-repeat, url(middle.gif) left repeat-y; /*Background origin*/ background-origin: border; /*Other options: padding or content*/
• Not CSS3! – But useful and desirable – Can be “shived” to support all browsers
• Use LESS to write less CSS – Variables, operations, mix-ins, nested rules /*Variables*/ @primaryColor: #383939; background-color: @primaryColor; /*Mix-ins!!*/ .roundedCorners (@radius: 12px) { -moz-border-radius: @radius; -webkit-border-radius: @radius; border-radius: @radius; } #page { background-color: @primaryColor; .roundedCorners; } <link rel="stylesheet/less" href="style.less" type="text/css" /> <script src="http://lesscss.googlecode.com/files/less-1.0.21.min.js"></script>
• Animate by setting CSS properties – Works when JS is disabled #id_of_element { -webkit-transition: all 1s ease-in-out; -moz-transition: all 1s ease-in-out; -o-transition: all 1s ease-in-out; transition: all 1s ease-in-out; }
• Target styles to specific devices… – And features! /*These two rules do the same thing*/ @media all and (min-width:500px) { … } @media (min-width:500px) { … } /*Multiple conditions*/ @media screen and (min-width: 600px) and (max-width: 900px) { .class { background: #333; } }
• Features waiting for friends WebKit • Reflections (- webkit-box- reflect) • 3D Transforms (- webkit- perspective) Mozilla • <Nothing notable?> IE (9) • Hardware rendering!
• Shiv’r + Inspector – Simple way to check feature support – Conditional JS and CSS .multiplebgs div p { /* properties for browsers that support multiple backgrounds */ } .no-multiplebgs div p { /* optional fallback properties for browsers that don't */ } if (Modernizr.canvas) { //Canvas supported } if (Modernizer.cssColumns){ //Columns supported } //Etc... *Don’t use with IE HTML5shiv. One or the other.
which HTML5/CSS3 technique will you try?
Thanks! Gracias! Mersi! Blagodarya! @toddanglin telerikwatch.com anglin@telerik.com
• See slide notes
• LESS CSS “framework” + tutorial – http://designshack.co.uk/articles/css/using-less- js-to-simplify-your-css3 • LESS T4 Template from Phil Haack – http://haacked.com/archive/2009/12/02/t4- template-for-less-css.aspx • LESS VS CSS code highlighting – http://visualstudiogallery.msdn.microsoft.com/en- us/dd5635b0-3c70-484f-abcb-cbdcabaa9923

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