Many HTML tags have a unique set of their own attributes. These will be discussed as each tag is introduced throughout the tutorial. Right now we want to focus on a set of generic attributes that can be used with just about every HTML Tag in existence.
Attributes are placed within the opening tag and they follow a precise syntax (format).
HTML – Class or ID Attribute
The class and id attributes are nearly identical. They play no direct role in formatting your elements but rather serve behind the scenes for scripting and Cascading Style Sheets (CSS). The role of classification and identifying elements will become more apparent as your learn CSS.
The idea is that you can classify or id certain a tag and later format the tag using Cascading Style Sheets. It becomes necessary when you have two or more of the same element on a page (like a <p> tag) but want them to be different in appearance.
<p id="italicsparagraph">Paragraph type 1 Italics</p> <p id="boldparagraph">Paragraph type 2 Bold</p>
Paragraph type 2 Bold
HTML – Name Attribute
<input type="text" name="TextField" />
The Name Game:
This attribute has no effect on the display of the text field, but behind the scenes it plays a huge identification role.
HTML – Title Attribute
This is a neat little perhaps, forgotten attribute. This attribute titles an element and adds a tiny text pop-up to any HTML element. Much like the text pop-ups of word processing programs, these attributes should not be forgotten. You may title an element anything you would like, the effects of this attribute are not seen until you hover your mouse over the element for a few seconds.
<h2 title="Hello There!">Titled Heading Tag</h2>
Titled Heading Tag
Hover your mouse over the display heading to see the magic of the title attribute! This provides your web site with some user interaction which is priceless. Do not overlook the title attribute.
HTML – Align Attribute
If you wish to change the horizontal location of your elements you may do so using the align attribute. You may align things left, right, or center. By default most elements are automatically aligned left unless otherwise specified.
<h2 align="center">Centered Heading</h2>
<h2 align="left">Left aligned heading</h2> <h2 align="center">Centered Heading</h2> <h2 align="right">Right aligned heading</h2>
Left aligned heading
Right aligned heading
Many tags are assigned default attributes. This means that unless a tag attribute is specified by you the creator, it will have some distinct attributes. For example, a paragraph tag will always align its text to the left unless it has an align attribute in it specifying otherwise. Also elements placed within a table are vertically centered and to the left unless otherwise specified. As you code and learn about each of the different HTML elements, you will become aware of many of these defaults.
Attributes exist to modify HTML tags allowing for complete customization of a website. Here’s a table of some other attributes that are readily usable with many of HTML’s tags.
|align||right, left, center||Horizontally aligns tags|
|valign||top, middle, bottom||Vertically aligns tags within an HTML element.|
|bgcolor||numeric, hexidecimal, RGB values||Places a background color behind an element|
|background||URL||Places an background image behind an element|
|id||User Defined||Names an element for use with Cascading Style Sheets.|
|class||User Defined||Classifies an element for use with Cascading Style Sheets.|
|width||Numeric Value||Specifies the width of tables, images, or table cells.|
|height||Numeric Value||Specifies the height of tables, images, or table cells.|
|title||User Defined||“Pop-up” title for your elements.|