我最终使用page.evaluate运行一些js，这些js向要分析的每个元素和子元素添加了唯一的类名，然后将其作为JSON字符串从页面传回.evaluate只返回一个字符串.然后，我只在每个唯一选择器上调用DOM.querySelector，并以此方式遍历它们.

I ended up using page.evaluate to run some js that adds unique classnames to every element and subelement I want analyzed and then pass that back as JSON string since page.evaluate only returns a string. Then I just call DOM.querySelector on each of those unique selectors and loop through them that way.

从页面返回子代.$ eval不会给我提供可以在其上运行更多dev协议功能的协议节点，并且xpath不能解决我的真正问题，因为它无法递归地遍历所有子子代，然后这些孩子的子孩子.

Returning children from page.$eval doesn't give me protocol nodes that I can run more dev protocol functions on, and xpath doesn't solve my real problem because it can't recursively loop through all sub-children, then the sub-children of those children.

我正在解决此问题，因为使用唯一的类名进行标记可以解决我的问题.

I'm closing the issue since labeling using unique classnames solves my problem.