Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as reserved keyword.
The value used in the target property of an <a> element has been identified as a keyword because it starts with an underscore _, but it’s not a valid keyword.
Values starting with an underscore for the target property are used for reserved keywords like _blank, _self, _parent or _top.
25,000 HTML checks per month. Fully automated.
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