function importNode$1(node, deep) {
  if (node.ownerDocument !== document) {
    return importNode.call(document, node, deep);
  }
  let n = importNode.call(document, node, false);
  if (deep) {
    let c$ = node.childNodes;
    for (let i=0, nc; i < c$.length; i++) {
      nc = importNode$1(c$[i], true);
      n.appendChild(nc);
    }
  }
  return n;
}
// to cloned natively. This is a fairly significant performance win.
to cloned natively. This is a fairly significant performance win.
to cloned natively . This is a fairly significant performance win .
function importNode$1(node, deep) {
  if (node.ownerDocument !== document) {
    return importNode.call(document, node, deep);
  }
  let n = importNode.call(document, node, false);
  if (deep) {
    let c$ = node.childNodes;
    for (let i=0, nc; i < c$.length; i++) {
      nc = importNode$1(c$[i], true);
      n.appendChild(nc);
    }
  }
  return n;
}
function importNode$1 ( node , deep ) { if ( node . ownerDocument !== document ) { return importNode . call ( document , node , deep ) ; } let n = importNode . call ( document , node , false ) ; if ( deep ) { let c$ = node . childNodes ; for ( let i = 0 , nc ; i < c$ . length ; i ++ ) { nc = importNode$1 ( c$ [ i ] , true ) ; n . appendChild ( nc ) ; } } return n ; }
to cloned natively.
to cloned natively .