要找到SRC的值的字符串

+0

的可能重複[串/正則表達式來獲得字符串舉行一個src值（HTTP：//計算器。 com/questions/12393671/substring-regex-to-get-a-src-value-held-in-a-string） –

+0

@Ashok你有一個字符串或一個HTML元素，請你在澄清之前先澄清 –

+1

做檢查如果你的字符串有效或沒有。它應該是var srcString =「」;或var srcString1 =「<iframe width ='420'height ='315'src ='https：//www.youtube.com/embed/DgPO56ImqUA？showinfo = 1'frameborder ='0'allowfullscreen>」; – <span class="text-secondary"> <small> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/3425110/">Newinjava</a></span> <span></span> </small> </span> </p> </div> </div> </div> </div> </div> </article> </div> <div class="answer-title"> <span class="text-logo margin-top-sm">A</span> <h2 class="title h4">回答</h2> </div> <div class="item-description text-md markdown-body margin-bottom-40 voidso"> <article class="board-top-1 padding-top-10"> <div class="post-col vote-info"> <span class="count">3<i class="fa fa-thumbs-up"></i></span> <i class="fa fa-check fa-2x"></i> </div> <div class="post-offset"> <div class="answer fmt"> <p>您可以使用正則表達式來從你的字符串拉<code class="prettyprint-override">src</code>像這樣：</p> <pre><code class="prettyprint-override">var myString = '<iframe width="420" height="315" src="https://www.youtube.com/embed/DgPO56ImqUA?showinfo=1" frameborder="0" allowfullscreen></iframe>'; var regex = /<iframe.*?src="(.*?)"/; var src = regex.exec(myString)[1]; console.log(src); </code></pre> </div> <div class="post-info"> <div class="post-meta row"> <p class="text-secondary col-lg-6"> <span class="source"> <a rel="noopener" target="_blank" href="https://stackoverflow.com/q/30525197">來源</a> </span> </p> <p class="text-secondary col-lg-6"> <span class="float-right date"> <span>2015-05-29 08:49:57</span> </p> <p class="col-12"></p> <p class="col-12"></p></div> </div>  <div class="comments"> <div itemprop="comment" class="post-comment"> <div class="row"> <div class="col-lg-1"><span class="text-secondary">+0</span></div> <div class="col-lg-11"> <p class="commenttext">謝謝@Mcmillan – <span class="text-secondary"> <small> <span></span> </small> </span> </p> </div> </div> </div> </div> </div> </article> <div> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-6208739752673518" data-ad-slot="1038284119" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <article class="board-top-1 padding-top-10"> <div class="post-col vote-info"> <span class="count">0<i class="fa fa-thumbs-up"></i></span> </div> <div class="post-offset"> <div class="answer fmt"> <p>提供一個名稱的幀如</p> <p>「名稱=」幀1" 寬度= ..... />」</p> <p>然後使用此警報（document.frames [ '幀1'] .location.href）;</p> </div> <div class="post-info"> <div class="post-meta row"> <p class="text-secondary col-lg-6"> <span class="source"> <a rel="noopener" target="_blank" href="https://stackoverflow.com/q/30525022">來源</a> </span> </p> <p class="text-secondary col-lg-6"> <span class="float-right date"> <span>2015-05-29 08:40:39</span> </p> <p class="col-12"></p> <p 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