allowCustomElement method
Allow custom elements with the specified tag name and specified attributes.
This will allow the elements as custom tags (such as
Implementation
void allowCustomElement(String tagName,
{UriPolicy uriPolicy,
Iterable<String> attributes,
Iterable<String> uriAttributes}) {
var tagNameUpper = tagName.toUpperCase();
var attrs = attributes
?.map<String>((name) => '$tagNameUpper::${name.toLowerCase()}');
var uriAttrs = uriAttributes
?.map<String>((name) => '$tagNameUpper::${name.toLowerCase()}');
if (uriPolicy == null) {
uriPolicy = new UriPolicy();
}
add(new _CustomElementNodeValidator(
uriPolicy, [tagNameUpper], attrs, uriAttrs, false, true));
}