bool allowsAttribute(
Element element,
String attributeName,
String value
)

Returns true if the attribute is allowed.

The attributeName parameter will always be in lowercase.

See allowsElement for format of tagName.

Source

/**
 * Returns true if the attribute is allowed.
 *
 * The attributeName parameter will always be in lowercase.
 *
 * See [allowsElement] for format of tagName.
 */
bool allowsAttribute(Element element, String attributeName, String value);