JS获取生成的textnode的值

var textNodes = document.evaluate(
  "//text()", 
document.body, 
null, 
XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, 
null);

for (var i = 0; i < textNodes.snapshotLength; i++) {
  var textNode = textNodes.snapshotItem(i);
  var value = textNode.textContent;
  console.log(value);
}

var textNodes = document.evaluate(
  "//text()", 
document.body, 
null, 
XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, 
null);

for (var i = 0; i < textNodes.snapshotLength; i++) {
  var textNode = textNodes.snapshotItem(i);
  console.log(textNode);
}