alt | 易学教程

Why would the supplied alt text not display when an image fails to load?

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问题 I attempted to add update 10 to this post: Why does my img error function fail?, but I would have surpassed the maximum post length, and so have to start a new question. The "obvious" issue I've been forgetting this whole time is that I'm supplying an "alt" text value for each image and so, whenever they aren't loaded or don't display for any reason, the alt text should display in place of the image, right? And it's not - ever. So, since this is not happening, nor did any of the answers work,

How to set the alt attribute for h:graphicImage?

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问题 I define a image in my JSF application: <h:graphicImage library="myPath" name="myImg"/> As result my HTML output: <img src="bla-bla-bla" alt="" /> It works properly but I have a question. How to set the attribute alt for HTML tag img in this case? For example <h:graphicImage library="myPath" name="myImg" alt="myText"/> doesn't work... 来源： https://stackoverflow.com/questions/10897493/how-to-set-the-alt-attribute-for-hgraphicimage

POI Excel HSSFPicture Image and ALT TEXT

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问题 I am using POI Excel HSSFPicture to create an image and add it to my excel file. I would like to add ALT TEXT to my image but I cannot find a way to add description to my image. Is there a way to add ALT TEXT to an image using POI for Excel? 回答1: Your requirement is to display alt text when the Image is not visible, right? So just an alternate try to use the Cell Comments to display the alt text. 来源： https://stackoverflow.com/questions/31147214/poi-excel-hssfpicture-image-and-alt-text

Alt Tags not working on my site

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问题 I am trying to figure out why alt image tags are not working on my site www.slickcar.com. I have reviewed the alt= tag and it looks correct but when I look at in the IE, Chrome or Firefox they do not display when I hover over the images. 回答1: The alt attribute is not meant to be a tooltip. It serves as text alternative to the image, e.g. for screen reader or text browser users, search engines etc. The value of the alt attribute should describe the content (= the image), so that someone can

How to output windows Alt keycodes in a C# console app

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问题 How can I output Windows Alt key codes to the console in a C# console app using Console.WriteLine()? I would like to output characters such as those used for creating boxes. I can do so manually in a command prompt by holding alt and typing in the appropriate number such as Alt+205, Alt+187, etc. Thanks 回答1: I suppose the easiest way would be to include them directly in your string literals within your source code: Console.WriteLine("═╗"); 回答2: EDIT: I'm sorry - my answer is incorrect. ASCII

How to make Leaflet tile layers accessible

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问题 How can you add an 'alt' tag to tile layers, and raise the accessibility score of an application, in particular to the Esri.WorldGrayCanvas , but any of the tiles found at http://leaflet-extras.github.io/leaflet-providers/preview/? 回答1: You could manipulate the tile images when they load by hooking into the tileload event: esriGray.on('tileload', function (tileEvent) { tileEvent.tile.setAttribute('alt', 'Map tile image'); }); That way the images always have the alt tag, even after zoom/pan

Put title/alt attributes into CSS :after { content: image }?

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问题 I’ve got the following CSS to add a PDF icon to any link that links to a PDF: a.pdf-link:after { padding-left: 2px; content: url(../images/icon-pdf-link.gif);} Is it possible to put some title and alt attributes on this image? I would like it so that the user is able to hover over the icon and get some text like “This links to a .pdf file.” Which I’ve typically done just by putting title attributes to it, but can’t figure out if I can do that through this method. 回答1: No, content only accepts

How to style alt text color?

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I want to style alt text color of map area image -> alt="Victoria's Secret" By default is blue, but I want to be red! I tried some methods without sucess... Any help? This is my code: <map name="Map" id="Map"> <area shape="rect" coords="22,4,126,50" href="http://www.victoriassecret.com/" target="_blank" alt="Victoria's Secret"/> Can you be more specific in your target platform, language etc. I am assuming you are trying to change the alt text in a HTML page. This is unfortunately not possible see here as alt text is set by the browser/operating system. Aside from which, alt text is generally

NVDA reader reads the source of an image in img tag - in IE Browser Only

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问题 On mouse-over on an image in IE browser, the NVDA screen reader reads the entire source of the image file along with alt text and title, for example: Smiley http://blog.smiley.com/wp-content/uploads/2015/05/High-Res-image.jpg How do I avoid this from happening? I want the screen reader to read only the alt text and title. 来源： https://stackoverflow.com/questions/30796844/nvda-reader-reads-the-source-of-an-image-in-img-tag-in-ie-browser-only

How to style alt text color?

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问题 I want to style alt text color of map area image -> alt="Victoria's Secret" By default is blue, but I want to be red! I tried some methods without sucess... Any help? This is my code: <map name="Map" id="Map"> <area shape="rect" coords="22,4,126,50" href="http://www.victoriassecret.com/" target="_blank" alt="Victoria's Secret"/> 回答1: Can you be more specific in your target platform, language etc. I am assuming you are trying to change the alt text in a HTML page. This is unfortunately not