insertChild method

Element insertChild(
  1. int index,
  2. Element node
)

Implementation

Element insertChild(int index, Element node) {
  final children = this.children;
  if (index >= children.length) {
    return appendChild(node) as Element;
  } else if (index == 0) {
    var child0 = firstChild;
    if (child0 == null) {
      return appendChild(node) as Element;
    } else {
      return insertBefore(node, child0) as Element;
    }
  } else {
    var child = children.item(index)!;
    return insertBefore(node, child) as Element;
  }
}