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* Add optional decoding="async" loading="lazy" for img In theory, they can make the page load faster and show content faster. There’s one problem: CommonMark allows arbitrary inline elements in alt text. If I want to get the correct alt text, I need to match every inline event. I think most people will only use plain text, so I only match Event::Text. * Add very basic test for img This is the reason why we should use plain text when lazy_async_image is enabled. * Explain lazy_async_image in documentation * Add test with empty alt and special characters I totaly forgot one can leave the alt text empty. I thought I need to eliminate the alt attribute in that case, but actually empty alt text is better than not having an alt attribute at all: https://www.w3.org/TR/WCAG20-TECHS/H67.html https://www.boia.org/blog/images-that-dont-need-alternative-text-still-need-alt-attributes Thus I will leave the empty alt text. Another test is added to ensure alt text is properly escaped. I will remove the redundant escaping code after this commit. * Remove manually escaping alt text After removing the if-else inside the arm of Event::Text(text), the alt text is still escaped. Indeed they are redundant. * Use insta for snapshot testing `cargo insta review` looks cool! I wanted to dedup the cases variable, but my Rust skill is not good enough to declare a global vector. |
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