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Results for “constraints”
Small, practical examples. Search by task or narrow things down below.
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Select a time in quarter-hour increments
HTML: A time step is expressed in seconds, so 900 represents fifteen minutes.
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Validate a structured text identifier
HTML: The pattern attribute matches the entire nonempty input; required handles the empty case.
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Validate the shape of an absolute URL
HTML: A URL input checks syntax, not whether a resource exists or is safe.
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