Add HTML Node method to count child elements

HTMLKit/HTMLNode.h

@@ -88,6 +88,8 @@ typedef NS_ENUM(unsigned short, HTMLDocumentPosition)
 
 - (NSUInteger)indexOfChildNode:(HTMLNode *)node;
 
+- (NSUInteger)childElementsCount;
+
 - (HTMLElement *)childElementAtIndex:(NSUInteger)index;
 
 - (NSUInteger)indexOfChildElement:(HTMLElement *)element;

HTMLKit/HTMLNode.m

@@ -159,6 +159,13 @@
 	return [self.childNodes objectAtIndex:index];
 }
 
+- (NSUInteger)childElementsCount
+{
+	return [self.childNodes indexesOfObjectsPassingTest:^BOOL(HTMLNode *  _Nonnull node, NSUInteger idx, BOOL * _Nonnull stop) {
+		return node.nodeType == HTMLNodeElement;
+	}].count;
+}
+
 - (NSUInteger)indexOfChildNode:(HTMLNode *)node
 {
 	return [self.childNodes indexOfObject:node];