Alternate text not used during copy and paste
The browser does not use alternate text when copying content that contains images. For example, select and copy content containing an image.
Paste into another application as "Unformatted Text" into Microsoft Word, or into Notepad or into an email program.
Alternate text (the value from of the image's @alt attribute) should be inserted in place of the image. Instead, the browser inserts nothing in place of the image. This means content is lost when pasting into other applications. This can affect comprehension. And this behavior does not encourage the use of alternate text, which is a primary accessibility feature in HTML.
Render the following markup:
<h1>I <img src="heart.gif" alt="love" /> you!</h1>
Test page with the above markup.
Select and copy the content. Paste it into an application like Notepad.
The result is "I you!". Instead, the result should be "I love you!".
Example of products that correctly support copy/paste of alternate text:
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