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Relax advice on alt-text character count

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Seirdy 2024-12-06 23:08:51 -05:00
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content/posts/website-best-practices.gmi
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@ -558,7 +558,7 @@ Expect some readers to have images disabled or unloaded. Examples include:
Accordingly, follow good practices for alt-text:
* Concisely summarize the image content the best you can, without repeating the surrounding content.
* Images should usually have alt-text under 100 characters, excluding punctuation. Save longer descriptions for a caption or "aria-describedby". Exceptions exist; this is just a weak norm.
* Images should usually have alt-text under 100 characters, excluding punctuation. Save longer descriptions for a caption or "aria-describedby". Exceptions exist; this is just a weak norm. If longer descriptions elsewhere aren't an option, disregard this advice and make alt-text as long as it needs to be.
* Don't include significant information that isn't present in the image; I'll cover how to handle supplementary information in the next subsections.
The W3C's Web Accessibility Initiative (WAI) offers a decision tree for writing alt-text. It's a little lacking in nuance, but makes for a good starting point:

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content/posts/website-best-practices.md
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@ -596,7 +596,7 @@ Accordingly, follow good practices for alt-text:
* Concisely summarize the image content the best you can, without repeating the surrounding content.
* Images should usually have alt-text under 100 ch.[^21] Save longer descriptions for a caption or <code>aria-<wbr />describedby</code>. Exceptions exist; this is just a weak norm.
* Images should usually have alt-text under 100 ch.[^21] Save longer descriptions for a caption or <code>aria-<wbr />describedby</code>. Exceptions exist; this is just a weak norm. If longer descriptions elsewhere aren't an option, disregard this advice and make alt-text as long as it needs to be.
* Don't include significant information that isn't present in the image; I'll cover how to handle supplementary information in the next subsections.