Question

您好我从XMLHttpRequest获取了一个JSON字符串，我将其转换为JavaScript对象：

response = JSON.parse(xmlhttp.responseText);

其中一个JSON元素值是一个字符串，表示带有noscript标记的脚本标记（输出显示console.log（response.ad.con）;）：

<SCRIPT language='JavaScript1.1' SRC="https://ad.doubleclick.net/ddm/adj/N378.150781.4704472308521/B5632202.128522416;sz=300x250;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?"></SCRIPT><NOSCRIPT><A HREF="https://ad.doubleclick.net/ddm/jump/N378.150781.4704472308521/B5632202.128522416;sz=300x250;ord=[timestamp]?"><IMG SRC="https://ad.doubleclick.net/ddm/ad/N378.150781.4704472308521/B5632202.128522416;sz=300x250;ord=timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER=0 WIDTH=300 HEIGHT=250 ALT="Advertisement"></A></NOSCRIPT>

我现在想要获取脚本标记的SRC元素中的字符串。我怎样才能做到这一点？我想我在转换中迷失了......

非常感谢！

Answer 1

您可以使用DOMParser来解析HTML字符串，就像JSON等一样，然后只使用DOM方法获取属性

var response = JSON.parse(xmlhttp.responseText);

var parser   = new DOMParser();
var doc      = parser.parseFromString(response.propertyWithHtml, "text/html");

var src      = doc.querySelector('script').getAttribute('src');

Answer 2

如果你使用jQuery，试试这个

$('<SCRIPT language="JavaScript1.1" SRC="https://ad.doubleclick.net/ddm/adj/N378.150781.4704472308521/B5632202.128522416;sz=300x250;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?"></SCRIPT><NOSCRIPT><A HREF="https://ad.doubleclick.net/ddm/jump/N378.150781.4704472308521/B5632202.128522416;sz=300x250;ord=[timestamp]?"><IMG SRC="https://ad.doubleclick.net/ddm/ad/N378.150781.4704472308521/B5632202.128522416;sz=300x250;ord=timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER=0 WIDTH=300 HEIGHT=250 ALT="Advertisement"></A></NOSCRIPT>').attr("SRC")

如何从JSON对象获取元素值，首先将其转换为HTML然后转换为String

2 个答案: