For the use of alt attributes in Wikipedia, see Wikipedia:Alternative text for images.
Alternative text that appears when a HTML element cannot be rendered
The alt attribute is the HTML attribute used in HTML and XHTML documents to specify alternative text (alt text) that is to be displayed in place of an element that cannot be rendered. The alt attribute is used for short descriptions, with longer descriptions using the longdesc attribute. The standards organization for the World Wide Web, the World Wide Web Consortium (W3C), recommends that every image displayed through HTML have an alt attribute, though the alt attribute does not need to contain text. The lack of proper alt attributes on website images has led to several accessibility-related lawsuits.
The alt attribute is used to increase accessibility and user friendliness, including for blind internet users who rely on special software for web browsing. The use of the alt attribute for images displayed within HTML is part of W3C's Web Content Accessibility Guidelines (WCAG). Screen readers and text-based web browsers read the alt attribute in place of the image. The text within the alt attribute substitutes the image when copy-pasted as text and makes images more machine-readable, which improves search engine optimization (SEO).
The altattribute is the HTML attribute used in HTML and XHTML documents to specify alternative text (alt text) that is to be displayed in place of an...
Look up Alt, alt, or alt- in Wiktionary, the free dictionary. Alt or ALT may refer to: Alt account, an alternative online identity also known as a sock...
The src attribute specifies the image URL. The required altattribute provides alternative text in case the image cannot be displayed. (Though alt is intended...
<element attribute="value">element content</element> Where element names the HTML element type, and attribute is the name of the attribute, set to the...
A link relation is a descriptive attribute attached to a hyperlink in order to define the type of the link, or the relationship between the source and...
statement, in either case, is contained in the content attribute, which is the only required attribute unless charset is given. charset is used to indicate...
specific type, e.g. the second-level headers h2 elements specified by attribute, in particular: id: an identifier unique within the document, denoted...
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the contents will be displayed. But if it is used with attribute 'Behavior' then the attribute 'Slide' will be ignored. Loops are counted by each time...
a document node. All HTML elements are element nodes. All HTML attributes are attribute nodes. Text inserted into HTML elements are text nodes. Comments...
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img is an empty element with attributes but no content or closing tag. <a href="https://example.org"><img src="image.gif" alt="descriptive text" width="50"...
cases it may even be a legal or contractual requirement – to provide an altattribute describing the link that screen reader software can read to, for example...
includes the global HTML attributes such as contenteditable, id, and title. However, pubdate, an optional boolean attribute of the <time> element, is...
consists of a drawable region defined in HTML code with height and width attributes. JavaScript code may access the area through a full set of drawing functions...
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linked, Google will use the "alt" attribute as the anchor text. Empty whenever an image is linked, and the "alt" attribute is empty. Latent semantic indexing...
style assignments that have been applied to an element using the style attribute. You can examine and set these styles by retrieving the style object for...
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malicious code from foreign domains, authors should check the origin attribute to ensure messages are accepted from domains they expect to receive messages...
online documents, visual description is often conveyed in the form of Altattribute, and in the case of self-introduction for inclusive meetings, it is...
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src="lbridge.jpg" type="image/jpeg"><p>London Bridge</p></object>. The altattribute of the img element was removed: alternative text was to be given in...
vulnerabilities for injection attacks such as cross-site scripting. If HTML attributes are left unquoted, certain characters, most importantly whitespace, such...
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