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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 ...
[10] [11] The alt attribute is intended to be used for short and concise descriptions of the image. Longer descriptions can be given using the longdesc attribute, which provides more detailed information and complements but does not replace the alt attribute. [2] A screen reader such as Orca will read out the alt text in place of the image. [12]
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.
Yes, it is possible for screen reader users to easily turn off or skip alt text. Re: The images in Istanbul, I really like the alt text for the map images, as they give me a sense of the locations of the features depicted on the map. However I'm not so keen on the alt texts for some of the buildings – the one about the acropolis is IMO one of ...
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.
Otherwise, (if the image type is unspecified or is "frameless"), this text is used for the link title provided the link has not been suppressed with "|link=", and also for the alt text provided an explicit alt=Alt has not been supplied. The actual alt text for the displayed image will be one of the following, in order of preference:
Align the top of the image to the top of the text. This is often a bit higher than the top of a capital letter, because of ascenders in letters like lower-case "h". [[File:Flag of Hungary vertical.svg| text-top |20px|link=|alt=]] Align the bottom of the image to the bottom of the text.