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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]
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 ...
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 ...
An image description is a form of text-based description referring to the characteristics of an image. Alt text presents visual information via text (usually encoded in HTML code), primarily to aid blind people using screen readers so they may have access and interact with the visual.
Instead, it appears as the title text of the image, commonly displayed as a tooltip during a mouseover. In a thumbnail the alt text defaults to empty, but a plain picture's alt text defaults to its title text if given and to the picture's file name if not; this default can be overridden with an explicit alt=Alt text option. Title text, like alt ...
The code alt="" with two quotes produces an alt text with two quotes. The code "alt=" (without the quotes) is exactly the same as not specifying the alt text at all. The problem is that alt text is needed when an image contains a link, but some images don't really need alt text because the captions are informative enough.
The alt text for an imagemap region is always the same as its title text; the alt text for the overall image is given in the first line of the imagemap's markup. The underlying image's native dimensions are 3916 × 1980, and the coordinates are given in these dimensions rather than in the 300px resizing.
Yes, it should be reworded. The point is, for images such as File:Proteinsynthesis.png alt text is crucial to understand the content of the article (where this image is inserted). Alt text is needed when the image contains an information that is important to understand the subject of the article.