Website crawl - H1 and image alt text data export
Thirty pages of curl.se with the accessibility pair on every row: h1, h1Count and headingJumps for skipped heading levels, plus imagesTotal, imagesMissingAltAttr and imagesEmptyAlt. A missing alt attribute is counted separately from an empty alt, because an empty alt is the correct way to mark a decorative image and is not a defect. Image files are not downloaded, so no file size is reported.
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