如何從JSON對象獲取元素值，然后先將其轉換為HTML，然后轉換為String

Question

嗨，我從XMLHttpRequest獲取JSON字符串，然后我將其轉換為JavaScript對象：

response = JSON.parse(xmlhttp.responseText);

JSON元素值之一是一個字符串，它表示一個帶有noscript標記的腳本標記，如下所示（輸出顯示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>

我現在想獲取腳本標記的SRC元素中的字符串。 我怎樣才能做到這一點？ 我想我迷失了轉換...

非常感謝！

Answer 1

您可以使用DOMParser解析HTML字符串，就像使用JSON等一樣，然后使用DOM方法獲取屬性

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

如果您使用jQuery，請嘗試

$('<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")