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CSS image replacement is a Web design technique that uses Cascading Style Sheets to replace text on a Web page with an image containing that text. It is intended to keep the page accessible to users of screen readers, text-only web browsers, or other browsers where support for images or style sheets is either disabled or nonexistent, while allowing the image to differ between styles.
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 ...
Many templates, like {}, have parameters for specifying alt text. For images that link to their description page (most images on Wikipedia), the alt parameter should not be blank, nor should the alt parameter be absent. A screen reader will default to reading out the image filename when no alt text is available.
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 ...
Specify a line of the following form for each image. |File:Filename |Caption |altn=alternative text |classn=CSS class. Note that the file name and the caption do not need parameter names, but each alt text parameter must be preceded by |altn=. Where: |File:Filename – the image's file name. Either File: or Image: prefix may be used
Caption accompanying image. alt: text: empty Alt text for people whose vision of the image is impaired (see WP:ALT). Either image or imagemap: valid image filename a or valid X/HTML imagemap: Specify either image or imagemap, but not both. width: positive integer – Total width (in pixels) of the box containing the image and annotations.
The base image has alt text "1896 Democratic campaign poster". The left circle has alt text "William J. Bryan". The right circle has alt text "Arthur Sewall". The blue (i) has alt text "About this image". All these are repeated as link title text, which provides a tooltip in some browsers, with the exception of the base image, which has link ...
groupstyle – a CSS style for the group-cells, such as: background: #eee; above – text to appear above the group/list section (could be a list of overall wikilinks). image – an optional right-side image, coded as the whole image, such as: [[File:XX.jpg|80px|alt=Alternate text]] Note that most of such images don't comply with MOS:DECOR and ...