indexOf method
Returns the index of a child node that matches selector
.
Implementation
int indexOf(Object? selector) {
if (selector == null || isEmptyContent) return -1;
if (selector is num) {
if (selector < 0) return -1;
if (selector >= _content!.length) return _content!.length;
return selector as int;
} else {
bool Function(DOMNode) nodeSelector = asNodeSelector(selector)!;
return _content!.indexWhere(nodeSelector);
}
}