Why might the same image need different alternative text?
A picture can provide information, act as a button, or simply decorate a page. Useful alternative text depends on that job and the surrounding content, so describing every visible detail is not always the right answer.
Questions you could explore
- When should the text describe an action rather than an appearance?
- When would repeating an image description add no useful information?
Start reading
- W3C Web Accessibility InitiativeImages Tutorial
W3C’s image tutorial distinguishes informative, functional, and decorative uses and explains why context matters.
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