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並前往https://rocketvalidator.com/html-validation/an-img-element-must-have-an-alt-attribute-except-under-certain-conditions-for-details-consult-guidance-on-providing-text-alternatives-for-images

An “img” element must have an “alt” attribute, except under ...

<img> tags, used to include images on a document, require an alt attribute to describe the contents of the image. This is essential for users that cannot ...

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