在Nokogiri中访问HTML属性

Question

Here is the code I'm using:

location = block.xpath("*/img")
puts location

And this outputs:

<img src="/images/p.gif" height="1" width="0">

What I want to do is get the width attribute out of the html, but I can't seem to get that too work. I think I need to put ['width'] somewhere in my code, and I've tried following various examples online but couldn't get it to work.

Answer 1

CSS选择器往往更容易且更具可读性：

puts block.at('img')[:height]

Answer 2

Take a look at the xpath syntax from this XPath Tutorial .

Try block.at_xpath("*/img")["width"] , or */img/@width if there is just one element.