如何使用javascript获取div中的子节点

var div = document.getElementById("myDiv");
var children = div.children;
for (var i = 0; i< children.length; i++) {
  console.log(children[i]);
}

var div = document.getElementById("myDiv");
var childNodes = div.childNodes;
for (var i = 0; i< childNodes.length; i++) {
  console.log(childNodes[i]);
}

var div = document.getElementById("myDiv");
var children = div.querySelectorAll("*");
for (var i = 0; i< children.length; i++) {
  console.log(children[i]);
}