Javascript 如何在RubyRacer中计算HTML DOM对象（如“文档”）

RubyRacer允许我在ruby环境中轻松执行javascript代码，如下所示：

cxt = V8::Context.new
wanted_output = cxt.eval(whatever_javascipt_code)

当涉及像“document”这样的对象时，比如在下面的代码段中，我们该如何做呢？ （换句话说，在这种情况下，如何生成“document.write”的输出？）

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谢谢你的任何提示

假设变量“script”包含上述javascript代码：

cxt = V8::Context.new
script.insert(0, "output=''")

document_write_count = script.scan('document.write(').count
remaining = script
document_write_count.times do |i|
  document_write_clause_content = remaining.partition('document.write(')[2].partition(')')[0]
  document_write_clause = "document.write(#{document_write_clause_content})"
  document_write_clause_replacement = "output+=#{document_write_clause_content}"
  script.gsub!(document_write_clause, document_write_clause_replacement)
  remaining = remaining.rpartition(document_write_clause_replacement)[2]
end

script.insert(-1, "output;")

wanted_output = cxt.eval("#{script}")

---

假设变量“script”包含上述javascript代码：

cxt = V8::Context.new
script.insert(0, "output=''")

document_write_count = script.scan('document.write(').count
remaining = script
document_write_count.times do |i|
  document_write_clause_content = remaining.partition('document.write(')[2].partition(')')[0]
  document_write_clause = "document.write(#{document_write_clause_content})"
  document_write_clause_replacement = "output+=#{document_write_clause_content}"
  script.gsub!(document_write_clause, document_write_clause_replacement)
  remaining = remaining.rpartition(document_write_clause_replacement)[2]
end

script.insert(-1, "output;")

wanted_output = cxt.eval("#{script}")

---

这是我第一次听说这种宝石，听起来很有趣。可惜它没有安装在windows上：（（这是我第一次听说这个gem，听起来很有趣。可惜它没有安装在windows上：((

cxt = V8::Context.new
script.insert(0, "output=''")

document_write_count = script.scan('document.write(').count
remaining = script
document_write_count.times do |i|
  document_write_clause_content = remaining.partition('document.write(')[2].partition(')')[0]
  document_write_clause = "document.write(#{document_write_clause_content})"
  document_write_clause_replacement = "output+=#{document_write_clause_content}"
  script.gsub!(document_write_clause, document_write_clause_replacement)
  remaining = remaining.rpartition(document_write_clause_replacement)[2]
end

script.insert(-1, "output;")

wanted_output = cxt.eval("#{script}")