How to insert sibling node after the current node

You can use ChildNode.after ()

document.createElement P = var ( 'P' ); 
var P1 = document.createElement ( 'P' ); 

// insert element node el.after (P); 
// Insert text node 
el.after ( 'the Hello' );  inserting a plurality of element node // el.after (P, P1);  // insert element nodes and text nodes  el.after (p, 'Hello') ;

 

note: 

1 can be inserted into an element node, a text node may be inserted;

2. A node may be inserted, may be inserted into the plurality of nodes;

3. The current element must have a parent node;