Style Tag in HTML5

Introduction

The HTML <style> tag is used for declaring style sheets within your HTML document. Each HTML document can contain multiple <style> tags. The below code defines the style.

background-color: color name or code
background-image=url(imagename)
font-family: font name
font-size: number unit ->units can be px, pt, mm, cm, in
font-weight:bold | bolder
text-decoration:underline | none
position: absolute | relative
color: color name or code
left=x
top=y
cursor: hand | crosshair

When a browser reads a style sheet, it will format the document according to it.

Attributes

HTML tags can contain one or more attributes. Attributes are added to a tag to provide the browser with more information about how the tag should appear or behave. Attributes consist of a name and a value separated by an equals (=) sign, with the value surrounded by double-quotes.

There are 3 kinds of attributes that you can add to your HTML tags: Element-specific, global, and event handler content attributes. The attributes that you can add to this tag are listed below.

Element-Specific Attributes

The following table shows the attributes that are specific to this tag/element.

Attributes Introduced by HTML5

Attributes	Description
type	Specifies the style sheet language as a content-type (MIME type).
media	Specifies the device that the styles apply to. It must be a valid media query. Possible values: all braille print projection screen speech
scoped	The scoped attribute specifies the style apply only for the style element's parent element and the parent element's children. Not the whole document.

Global Attributes

The following attributes are standard across all HTML 5 tags.

HTML5 Global Attributes
accesskey	draggable	style
class	hidden	tabindex
dir	spellcheck
contenteditable	id	title
contextmenu	lang

Event Handler Content Attributes

Here are the standard HTML 5 event handler content attributes.

onabort	onerror*	onmousewheel
onblur*	onfocus*	onpause
oncanplay	onformchange	onplay
oncanplaythrough	onforminput	onplaying
onchange	oninput	onprogress
onclick	oninvalid	onratechange
oncontextmenu	onkeydown	onreadystatechange
ondblclick	onkeypress	onscroll
ondrag	onkeyup	onseeked
ondragend	onload*	onseeking
ondragenter	onloadeddata	onselect
ondragleave	onloadedmetadata	onshow
ondragover	onloadstart	onstalled
ondragstart	onmousedown	onsubmit
ondrop	onmousemove	onsuspend
ondurationchange	onmouseout	ontimeupdate
onemptied	onmouseover	onvolumechange
onended	onmouseup	onwaiting

Types of Cascading Style Sheets (CSS): There are three types of CSS.

Inline CSS
Internal CSS
External CSS

Inline CSS: Inline CSS means applying the code directly on tags using the STYLE attribute.

For example:

<body><form id="form1" runat="server"><div><p style="background-color:Black;color:Yellow">Hello</p><h1 style="font-size:1in;color:red">Hi</h1></div></form></body>

Internal CSS: Internal CSS means applying the codes on the specified tags or create a named style that can be applied to any kind of tag. Such styles are created in <STYLE> tag under <HEAD> section. To create the named styles use. along with some name called as class name. Use CLASS attribute on tags to apply that class.

For example:

<head runat="server">
<title>Untitled Page</title>
<style type="text/css">
p {
color: blue;
font-size: 12pt;
}
A {
text-decoration: none;
}
A:hover {
color: red;
}
.btn {
cursor: hand;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<p>%</p>
<p>ass<span class="btn">aa</span>sfasfasdf</p>
<a href="http://asdfasd.com">
asdf</a><br />
<a href="http://asdfasdf.com">
as</a><br />
dfas<br />
df<br />
asf<br />
<input id="Button1" style="z-index: 100; left: 192px; position: absolute; top: 64px"
type="button" value="button" class="btn" onclick="return Button1_onclick()" />

External CSS: An external style sheet is ideal when the style is applied to many pages. With an external style sheet, you can change the look of an entire Web site by changing one file. Each page must link to the style sheet using the <link> tag. The <link> tag goes inside the <head> section.

<LINK href="filename.css" rel="stylesheet">add the following code in mylibrary.css file.body {
background-color: Aqua;
}
.testing {
font-family: Arial;
font-size: 16px;
background-color: #FF00FF;
border-style: dotted;
}
#first {
}
Now using file code. <html ><head ><title>Untitled Page</title><style type="text/css">#abc {
color: Red;
background-color: blue;
}
.xyz {
color: Yellow;
background-color: Black;
}</style><link href="MyLibrary.css" rel="Stylesheet" /> </head><body><form id="form1" runat="server"><div><h1 id="abc">Hello to all</h1><p class="xyz">Welcome to India</p><input type="button" value="Save Data" id="abc" /></div><asp:TextBox ID="TextBox1" runat="server" Class="xyz"></asp:TextBox></form><p class="testing">Hello</p></body></html>