Use this text operation when its stated character encoding, token boundaries, normalization, case handling, and output format match the surrounding workflow.

Loading attribute

Required string.

The cited overview of HTML attribute supplies background for the terminology and domain context used by this tool.^[1]

Check whether an HTML loading attribute is one of the recognized eager or lazy keywords, ASCII case-insensitively. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Recognized keyword

Returned boolean.

• Unicode normalization, locale, grapheme clusters, malformed input, ambiguous syntax, and implementation-specific conventions can change text-processing results.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Preserve the original text, test representative non-ASCII and malformed cases, and use a standards-aware parser or serializer when interoperability matters.

• Decoding Attribute Validator

  Check whether an image decoding attribute uses a recognized sync, async, or auto keyword.

• Fetch Priority Attribute Validator

  Check whether a fetchpriority attribute uses the recognized high, low, or auto keyword.

• CORS Allow-Origin Checker

  Check only whether Access-Control-Allow-Origin matches a supplied request Origin, including the wildcard restriction for credentialed requests.