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Alternative text (or alt text) is text associated with an image that serves the same purpose and conveys the same essential information as the image. [1] In situations where the image is not available to the reader, perhaps because they have turned off images in their web browser or are using a screen reader due to a visual impairment, the alternative text ensures that no information or ...
The alternative text serves the same purpose as the image. [1] On the web, alt text is supplied through the alt attribute. The World Wide Web Consortium (W3C) guidelines state that an image's alt attribute should convey meaning, rather than a literal description of the image itself. [2]
A text-based web browser such as Lynx will display the alt text instead of the image (or will display the value attribute if the image is a clickable button). [13] A graphical browser typically will display only the image, and will display the alt text only if the user views the image's properties, or has configured the browser not to display ...
Zero or more of these options may be specified to control the alt text, link title, and caption for the image. Captions may contain embedded wiki markup, such as links or formatting. See Wikipedia:Captions for discussion of appropriate caption text. See Wikipedia:Alternative text for images for discussion of appropriate alt text. Internet ...
For large amounts of caption text, use text-align:left; to make it left-justified. Alternate text is optional but recommended. See Alternate text for images for hints on writing good alternate text. To have some text to the left of an image, and then some more text below the image, then put in a single <br clear="all">.
This ensures that screen readers will read, and the mobile site will display, the image (and its textual alternative) in the correct section. This guideline includes alt text for LaTeX-formatted equations in <math> mode. See Wikipedia:Manual of Style/Mathematics § Alt text. Do not insert images in headings; this includes icons and <math ...
The thing with 4 is that I have seen where some folks have put the caption before the alt text and it seems like the alt text should go at the end, although I could see where if you can't see the image it would be more beneficial to have the alt text come before the caption so you can read what the picture looks like before you read the caption.
Banaticus : RexxS mentioned that decorative images should have null alt text AND no link, if possible. Because W3C guidelines tells us that an image inside a link cannot have an empty alt text, otherwise the filename is read aloud F89: Failure due to using null alt on an image where the image is the only content in a link). On Wikipedia, the ...