1

我将 html 部分的源代码保存为字符串：

var str= '<div class="quizdisplay themestylename theme_db_primarykey">
        <h1>What Power Would Suit You Best</h1>
        <p class="inline_byline"">Created by <a class="url fn" href="/user/xQUANTUMNxNOVAx/profile">xQUANTUMNxNOVAx</a></p>

        <div class="metacrumb">

                  <dl>

                    <dt>Tagged:</dt>

                      <dd><a class="tag" rel="tag" href="/tags/dark" title="dark">dark</a></dd>, <dd><a class="tag" rel="tag"
 href="/tags/personality" title="personality">personality</a></dd>,
 <dd><a class="tag" rel="tag" href="/tags/air"
 title="air">air</a></dd>, <dd><a class="tag" rel="tag"
 href="/tags/power" title="power">power</a></dd>, <dd><a class="tag"
 rel="tag" href="/tags/fire" title="fire">fire</a></dd>, <dd><a
 class="tag" rel="tag" href="/tags/water" title="water">water</a></dd>,
 <dd><a class="tag" rel="tag" href="/tags/energy"
 title="energy">energy</a></dd>, <dd><a class="tag" rel="tag"
 href="/tags/earth" title="earth">earth</a></dd>, <dd><a class="tag"
 rel="tag" href="/tags/lightning" title="lightning">lightning</a></dd>,
 <dd><a class="tag" rel="tag" href="/tags/telekinesis"
 title="telekinesis">telekinesis</a></dd>

                   </dl>

                </div>

        <div id="itemresults" class="quidget">
            <p>
                5493 other people got this result!
                That's 34%
            </p>
                        <a class="button viewallresults">View all results</a>
                            <a href="/quizzes" class="button" style="line-height:23px;width:150px;">Take another quiz!</a>

        </div>

        <h3 class="aquestion">Water/Ice.</h3>

                <img src="/user_images/X/XQ/XQU/XQUANTUMNXNOVAX/1346304322_6798_full.jpeg"
 alt="result image" />

        <p>You go with the flow, following the motions of the world around you. You're calming and relaxing but have an aggressive side to
 you when necessary. You can be in tune with people easily, or can be
 completely cold hearted. People typically love you, and need you the
 most.</p>

 </div>';

如何使用 javascript 从此字符串中提取图像 url？

4

2 回答 2

4

jQuery

var srcArray = [];
$(str).find('img').each(function(){
   src = $(this).attr('src');
   srcArray.push(src);
});

或者您可以使用正则表达式：

var regex = /(?<=<img src=").*?(?=")/gm;
src = regex.match(str);
alert(src);

这个链接上的例子。

于 2012-09-05T01:31:45.483 回答
0

因为它是 HTML。您可以将全部内容插入 DOM（隐藏）并使用 jQuery 来获取图像 url，这有点 hacky，但可能是最简单的方法。

您还可以使用正则表达式来搜索图像标签并从中获取 url。

于 2012-09-05T01:01:34.227 回答