Attribute Name Case Sensitive

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Q

Is Attribute Name Case Sensitive?

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A

Yes, XHTML attribute names are case sensitive. You must write all attribute names in lower case letters.

Here are some valid and invalid attribute names:

<a href="http://dev.fyicenter.com"> - Valid attribute name.
<a HREF="http://dev.fyicenter.com"> - Invalid attribute name, must use lower case letters.
<script Type="text/javascript"> - Invalid attribute name, must use lower case letters.

Note to HTML document authors: HTML element attribute names are not case sensitive. But XHTML element attribute names are case sensitive. If you are converting existing HTML documents to XHTML documents, you will get a lots of syntax errors about upper case letters used in HTML attributes.

⇒ Quoting HTML Element Attribute Values

⇐ Writing HTML Element Attributes

⇑ HTML Tag and Attribute Syntax

⇑⇑ HTML Tutorials

2023-09-23, 1544🔥, 0💬

Quoting HTML Element Attribute Values
How To Quote Element Attribute Values Properly? You know that attribute values must be quoted. But how to attribute values properly? Here are some basic rules you should remember: An attribute value must be quoted. An attribute value can be quoted with double quotes as "...". An attribute value can ... 2023-09-23, ∼1774🔥, 0💬

XHTML Element Name Case Sensitive
Is XHTML Element Name Case Sensitive? Yes, XHTML element names are case sensitive. All element names must be written in lower case letters. Here are some valid and invalid XHTML element names: <html> - Valid name. <HTML> - Invalid name, must use lower case letters. &l... 2024-04-07, ∼1768🔥, 0💬

Closing XHTML 'meta' Tags
What Is wrong with my <meta> Tags? If you are converting existing HTML documents to XHTML format, you may find some <meta> tags are written as: <meta name="Author" content="FYICenter.com"&gt ;<meta name="Description" content="Tutorials, FAQs and Tips on ... 2024-04-07, ∼1745🔥, 0💬

Entering HTML Element Content
How To Enter HTML Element Content? Most of HTML elements allow you to specify contents. But there are some HTML elements that do not allow any contents. If an HTML element does allow element content, you can enter the content between the opening tag and the closing tag. Here are some good examples o... 2024-04-07, ∼1734🔥, 0💬

Writing HTML Element Attributes
How To Write Element Attributes Properly? If an attribute is allowed for an XHTML element, you must write the attribute inside the opening tag of this element. Here are some rules on writing element attributes: An attribute must have a name and a value, separated by the equal sign "=". An attribute ... 2024-04-07, ∼1700🔥, 0💬

The 'checked' Attribute of some HTML Elements
What Is Wrong with My "checked" Attribute Values? Attribute "checked" is an optional attribute for HTML element "input". In XHTML specification, attribute "checked" has only one predefined value: "checked". However, in HTML specification, attribute "checked" requires no value. If you are converting ... 2017-07-30, ∼1670🔥, 0💬

Predefined HTML Attribute Values
What Are Predefined Attribute Values for an HTML attribute? Some HTML attributes have predefined values. If an attribute has predefined values, you must use one of the predefined values. For example, attribute "valign" of element "td" has 4 predefined values "baseline", "bottom", "middle", and "top"... 2023-09-23, ∼1639🔥, 0💬

Ampersand Sign in HTML Attribute Values
How To Write Ampersand Sign in Attribute Values? If you need enter an ampersand sign in an attribute value, you can not enter it directly. You must replace it with entity: &amp;. Here are some interesting examples of quoted attribute values: <img src="tt.gif" alt="Tutorials &a... 2023-09-23, ∼1627🔥, 0💬

Attribute Name Case Sensitive
Is Attribute Name Case Sensitive? Yes, XHTML attribute names are case sensitive. You must write all attribute names in lower case letters. Here are some valid and invalid attribute names: <a href="http://dev.fyicenter.com ">- Valid attribute name. <a HREF="http://dev.fyicenter.c.. . 2023-09-23, ∼1545🔥, 0💬

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