为什么我不能在jQuery中解析Ajax html GET响应？

I'm tempering with a Chrome Extension where I use an Ajax-request to get HTML from a requested URL. This works, but I want to get all the text values some certain elements. By example, everything with the class .heading-bold

script.js

我正在使用Chrome扩展程序，我使用Ajax请求从请求的URL获取HTML。这有效，但我希望得到一些特定元素的所有文本值。例如，所有类都带有.heading-bold script.js

$.ajax({
        url: "http://page.com/page.html",
        type: "GET",
        dataType: "html",
          success: function(data) {
              console.log($(data).filter( '.heading_bold' ).text()); 
          }
    });

Response HTML

响应HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head><title>Beerpong</title>
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
    <meta http-equiv="Expires" content="0" />
    <meta http-equiv="Pragma" content="no-cache" />
    <meta http-equiv="Cache-Control" content="no-cache" />
    </head>
     <body>
        <div id="table-container">
            <table>
               <tbody>
                  <tr>
                   <td><div class="heading_bold">Beerpong</div></td>
                  </tr>
                </tbody>
            </table>
        </div>
     </body>
    </html>

Logging it to the console works just fine. This is my output:

将其记录到控制台工作正常。这是我的输出：

Uncaught Error: Syntax error, unrecognized expression: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0....

Why? Why won't it just console.log my desired values?

为什么？为什么不只是console.log我想要的值？

2 个解决方案

#1

If you are using jquery 1.9, do:

如果您使用的是jquery 1.9，请执行以下操作：

...
success: function(data) {
   var html = $.parseHTML(data); 
   console.log($(html).find( '.heading_bold' ).text()); 
}
..

Because as per jQuery 1.9:: HTML strings passed to jQuery() that start with something other than a less-than character will be interpreted as a selector. Since the string usually cannot be interpreted as a selector, the most likely result will be an "invalid selector syntax" error thrown by the Sizzle selector engine. Use jQuery.parseHTML() to parse arbitrary HTML.

因为根据jQuery 1.9 ::传递给jQuery（）的HTML字符串以不同于小于字符的东西开头将被解释为选择器。由于字符串通常不能被解释为选择器，因此最可能的结果是Sizzle选择器引擎抛出的“无效的选择器语法”错误。使用jQuery.parseHTML（）来解析任意HTML。

#2

Maybe you could try to use "load" instead of "$.get()" if you want to insert a portion of the remote document into DOM.

如果要将远程文档的一部分插入DOM，也许可以尝试使用“load”而不是“$ .get（）”。

$("#result").load("page.html .heading_bold",function(response){
console.log($(this).find(".heading_bold").val());           
});

Hope this is helpful to you.

希望这对你有所帮助。

#1