Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as missing value.
An attribute has been found in an element, where the intended value is missing. A common cause is including the equal sign, but not passing anything after it.
<!-- This is missing the value for the style attribute, so it's invalid --> <p style=></p> <!-- This is explicitly passing a blank string as the value, so it's valid --> <p style=""></p>
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