New html5 tips and techniques

Valid values for id attribute

New html5 tips and techniques for the latest evolution of the standard that defines HTML is HTML5.

It represents two different concepts: Latest version of the language HTML, with new elements, attributes, and behaviors.

HTML tips & Techniques:

New Doctype
Still using XHTML doctype? Its time to remove.

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Switch to the new HTML5 doctype.

 <!DOCTYPE html>

Not to Quote
Not necessary to wrap your attributes in quotation marks if you don’t want to. You don’t have to close your elements also.

 <p class=myClass id=someId>

Header and Footer
Old ways:

 <div id="header">
 ...
 </div>
<div id="footer">
 ...
 </div>

New ways:

 <header>
 ...
 </header>
<footer>
 ...
 </footer>

Placeholders
Initially set the value attribute, but, when user deletes that text and clicks away, the input is left blank again.

<input name="email" type="email" placeholder="yourname@example.com" />

Email Inputs
If we use a type of “email” to form inputs, we can tell the browser to only allow strings that conform to a valid email address format.

 <input id="email" name="email" type="email" />

The Figure Element
Previous mark-up for an image

<img src="images/image.jpg" />
 <p>Image sample. </p>

Now combine <figure> with <figcaption> element.

 <figure>
 <img src="images/image.jpg" />
 <figcaption>
 <p>Image sample. </p>
 </figcaption>
 </figure>

<small> Redefined
According to the new HTML5 the <small> is the correct wrapper for information.

No More Types for Scripts and Links
Old way:

 <link rel="stylesheet" href="style.css" type="text/css" />
 <script type="text/javascript" src="script.js"></script>

New way:

 <link rel="stylesheet" href="style.css" />
 <script src="script.js"></script>

Your content can be editable
As the name implies, it allows to edit any of the text within the element, including its children.

<div contenteditable=true>

Autofocus Attribute
By autofocus attribute particular input should be “selected,” or focused, by default.

<input type="text" name="name" placeholder="Your name here" required autofocus>

Required Attribute
Required attribute specifies whether a particular input is required or not.

<input type="text" name="name" required>
<input type="text" name="name" required="required">

Audio Support
HTML5 now offers the <audio> element.

<audio autoplay="autoplay" controls="controls">
    <source src="audiofile.ogg" />
    <source src="audiofile.mp3" /> 
</audio>

Video Support
HTML5 now offers the <video> element. HTML5 doesn’t specify a specific codec for video, it’s up to the browsers to decide.

<video controls preload>
    <source src="videofile.ogv" type="video/ogg; codecs='vorbis, theora'" />
    <source src="videofile.mp4" type="video/mp4; 'codecs='avc1.42E01E, mp4a.40.23'" />
</video>

Regular Expressions
A quickie regular expression validates the user input.

<input type="text" name="name" id="name" pattern="[A-Za-z]{4,10}" autofocus required>

The Data Attribute

<div id="myDiv" data-myvalue="My Value"> This value </div>

Create Sliders with the Range Input
It introduces the new range type of input.

<input type="range" name="range" min="0" max="5" value="">

Mark Element
The <mark> element as a highlighter.

<p> Html5 uses, <mark>"mark tag"</mark> as a highlighter. </p>
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