Sample xpath html parse in crystal

parse_html_sample.cr

    require "xml"
    
    s = "
    <dic class='container'>
      <div class=\"main\">
        <div class=\"ca\" id=\"ia\">a</div>
        <span class=\"cb\" id=\"ib\">b</span>
      </div>
      <div class=\"main2\">
        <div class=\"ca\" id=\"ia\">a2</div>
        <span class=\"cb\" id=\"ib\">b2</span>
      </div>

    </div>"


    xml = XML.parse_html(s)
#    node = xml.xpath_node("//*[contains(@class, 'cb')]")

#    puts "txt #{node.inner_text}"
#    puts "inner #{node.inner_text}"

    node = xml.xpath_node("//*[contains(@class, 'main2')]")
    node = node.xpath_node("*[contains(@class, 'cb')]")

    puts "txt #{node.inner_text}"
    puts "inner #{node.inner_text}"