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Alt-Text & Link Rot — How Accessibility Features Benefit Everyone

Note: This article is best viewed in HTML. In this Gemtext version, I will use “🖼️” to indicate that an image loaded successfully and “❓” to indicate that an image failed to load.

HTML version

Links rot. It’s unfortunate, but it’s just a part of the web. Content disappears and links rot; if you don’t host your own images, then you can’t guarantee that your images will always appear. In this situation, alt-text can be the difference between your piece still making sense and it being completely useless. This is because many browsers show the alt-text with the missing image icon, so descriptive alt-text can make sure your audience still gets the necessary information.

Examples

Quiz question

Here is how this question is supposed to look like:

🖼️ Figure: Lunch menu showing prices of items. • Sushi bento — $12.00. • Vegan bento — $11.00. • Beef bento — $11.00. • Chirashi bento — $15.50.

Alice, Bob, and Carlos go to a restaurant and pay a total of $38.50. Bob does not eat beef. Alice payed less than Carlos, Carlos payed more than Bob, and Alice payed more than Bob. What did each person order at the restaurant?

Unfortunately, the link to the image no longer works, leaving this question completely unanswerable:

❓

Alice, Bob, and Carlos go to a restaurant and pay a total of $38.50. Bob does not eat beef. Alice payed less than Carlos, Carlos payed more than Bob, and Alice payed more than Bob. What did each person order at the restaurant?

If the person who made the quiz provided alt-text, then the quiz would still be answerable (albeit erroneously formated):

❓ Figure: Lunch menu showing prices of items. • Sushi bento — $12.00. • Vegan bento — $11.00. • Beef bento — $11.00. • Chirashi bento — $15.50.

Alice, Bob, and Carlos go to a restaurant and pay a total of $38.50. Bob does not eat beef. Alice payed less than Carlos, Carlos payed more than Bob, and Alice payed nore than Bob. What did each person order at the restaurant?

Graphs

Math can be nearly impossible sometimes without graphing. Imagine if you prepared a document with graphs but didn’t include alt-text! Here are some examples of how graphs can be understood through alt-text.

🖼️ Figure: Graph of y = |x − 2|. The line is V-shaped with a slope of ±1. The point of the V is at x=2, y=0.

Suppose we add the line g(x) = |x − 2|. Where would this line intersect with f(x)?

❓ Figure: Graph of y = |x − 2|. The line is V-shaped with a slope of ±1. The point of the V is at (2, 0).

Suppose we add the line g(x) = |x − 2|. Where would this line intersect with f(x)?

❓

Suppose we add the line g(x) = |x − 2|. Where would this line intersect with f(x)?

Images as links

If you use images as links, then not using alt-text means they’re completely unreadable if the image fails to load or if a user relies on a screenreader.

🖼️ Northern Essex Community College COVID-19 Safety Measures

❓ Northern Essex Community College COVID-19 Safety Measures

❓

General

Even if your images don’t contain critical information, you still probably put them there for a reason. It’d be nice if people still had an idea of the images if they don’t load.

🖼️ Image of fresh fruits and vegetables titled “Healthy Incentives Program” with the caption “Fresh. Canned. Dried. Frozen. It’s HIP to be healthy!”.

Did you know that Massachusetts residents who qualify for food stamps (SNAP) can get an additional $40 per person per household each month to spend on fresh fruits and vegetables?

❓

Did you know that Massachusetts residents who qualify for food stamps (SNAP) can get an additional $40 per person per household each month to spend on fresh fruits and vegetables?

❓ Image of fresh fruits and vegetables titled “Healthy Incentives Program” with the caption “Fresh. Canned. Dried. Frozen. It’s HIP to be healthy!”.

Did you know that Massachusetts residents who qualify for food stamps (SNAP) can get an additional $40 per person per household each month to spend on fresh fruits and vegetables?

Questions or comments? Email me.

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Questions, comments, or wrote a reply? Email me.