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HTML Checking for Large Sites

Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.

The step attribute is a number that specifies the granularity that the value must adhere to.

It sets the stepping interval when clicking up and down spinner buttons, moving a slider left and right on a range, and validating the different date types.

When used, it must be greater than zero.


  <!-- Valid values include 1.3, 3.3, 5.3, 7.3, 9.3, 11.3, and so on -->
  <input id="myNumber" name="myNumber" type="number" step="2" min="1.3" />

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Related W3C validator issues