在DOM深层获取评论节点

mrg*_*oos 3 javascript jquery dom-manipulation

如何获得包含DOM中所有注释元素的数组或类似数组(JQuery对象)? JQuery contents()只检索1个级别的元素.

更广泛的问题:我需要删除DOM中2个文本注释之间的所有元素.评论也可以在子元素中.

...html code...
<!--remove from here-->
...code...
<!--finish removing-->
...html code...
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因此,在该方法之后,HTML DOM应如下所示:

...html code...
...html code...
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谢谢.

Kai*_*ido 5

您可以将TreeWalkerwhatToShowset一起使用NodeFilter.SHOW_ALL以查看文档中的所有节点.

var treeWalker = document.createTreeWalker(
  document.body,
  NodeFilter.SHOW_ALL,
  null,
  false
);

var commentList = [];

while (treeWalker.nextNode()){
  // keep only comments
  if (treeWalker.currentNode.nodeType === 8) 
    commentList.push(treeWalker.currentNode);
}

var node;
while (node !== commentList[1]) {
  node = commentList[0].nextSibling;
  node.parentElement.removeChild(node);
}
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<!--Folowing element will be deleted-->
<span> Hello world</span>
<!-- the next one should be kept -->
<span> keep me !</span>
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