javascript - 在导航栏中将 parents() 显示为 html-6ren

javascript - 在导航栏中将 parents() 显示为 html

转载作者：行者123 更新时间：2023-11-30 16:27:47

我的页面上有一堆按钮元素，在 mouseover 上，我想抓取所选按钮的祖先，然后将它们显示为 html 或数组 inside导航栏。到目前为止，这是我的 javascript，它根本不起作用。有什么想法吗？

$( document ).ready(function() {
    $("*").on.("mouseover", function() {
      var treeTraversal = $(this).parents().map(function(){
      return this.tagName;}).get().join(", ");
      $("<span>").after("<h2>" + treeTraversal + "<h2>");
});

最佳答案

删除on之后的句点

http://codepen.io/tmorrow-hyphensolutions/pen/JYVLdz

    $(document).ready(function() {
      $("*").on("mouseover", function() {
        var treeTraversal = $(this).parents().map(function() {
          return this.tagName;
        }).get().join(", ");
        alert(treeTraversal);
        $("<span>").after("<h2>" + treeTraversal + "<h2>");
      });
    });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
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          <div class="f kv _SWb" style="white-space:nowrap"><cite class="_Rm">stackoverflow.com/questions/8110934/direct-vs-delegated-<b>jquery-on</b></cite>
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                    target="_blank">Cached</a>
                  </li>
                  <li class="action-menu-item ab_dropdownitem" role="menuitem"><a class="fl" href="/search?newwindow=1&amp;safe=active&amp;espv=2&amp;biw=1920&amp;bih=955&amp;q=related:stackoverflow.com/questions/8110934/direct-vs-delegated-jquery-on+jquery+on&amp;tbo=1&amp;sa=X&amp;ved=0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQHwg3MAM">Similar</a>
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                <ul>
                  <li class="action-menu-item ab_dropdownitem" role="menuitem"><a class="fl" href="http://webcache.googleusercontent.com/search?q=cache:0lmueC_HH1AJ:weblog.west-wind.com/posts/2013/Jun/12/Replacing-jQuerylive-with-jQueryon+&amp;cd=8&amp;hl=en&amp;ct=clnk&amp;gl=us" onmousedown="return rwt(this,'','','','8','AFQjCNEme9STE-hmv97uiK8edaCxAAK8og','b1TBIijjmTlAvZJsiFFxyw','0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQIAhRMAc','','',event)"
                    target="_blank">Cached</a>
                  </li>
                  <li class="action-menu-item ab_dropdownitem" role="menuitem"><a class="fl" href="/search?newwindow=1&amp;safe=active&amp;espv=2&amp;biw=1920&amp;bih=955&amp;q=related:weblog.west-wind.com/posts/2013/Jun/12/Replacing-jQuerylive-with-jQueryon+jquery+on&amp;tbo=1&amp;sa=X&amp;ved=0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQHwhSMAc">Similar</a>
                  </li>
                </ul>
              </div>
            </div>
          </div><span class="st"><span class="f">Jun 12, 2013 - </span>In <em>jQuery</em> 1.9 and later the <em>jQuery</em>.live() function has finally been removed which has caused me a bit of upgrade trouble. While <em>jQuery</em>.live() has&nbsp;...</span>
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    <div class="rc" data-hveid="84">
      <h3 class="r"><a href="https://www.codecademy.com/forum_questions/51205802e1738f7cce000002" onmousedown="return rwt(this,'','','','9','AFQjCNHKIeuhWKwOsU9XATx7ak997qhmeg','KdfKRvXAJgFNy_XWRevKKw','0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQFghVMAg','','',event)" target="_blank">How to run jquery on local machine | Codecademy</a></h3>
      <div class="s">
        <div>
          <div class="f kv _SWb" style="white-space:nowrap"><cite class="_Rm">https://www.codecademy.com/.../51205802e1738f7cce000...</cite>
            <div class="action-menu ab_ctl">
              <a class="_Fmb ab_button" href="#" id="am-b8" aria-label="Result details" aria-expanded="false" aria-haspopup="true" role="button" jsaction="m.tdd;keydown:m.hbke;keypress:m.mskpe" data-ved="0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQ7B0IVjAI"><span class="mn-dwn-arw"></span>
              </a>
              <div class="action-menu-panel ab_dropdown" role="menu" tabindex="-1" jsaction="keydown:m.hdke;mouseover:m.hdhne;mouseout:m.hdhue" data-ved="0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQqR8IVzAI">
                <ul>
                  <li class="action-menu-item ab_dropdownitem" role="menuitem"><a class="fl" href="http://webcache.googleusercontent.com/search?q=cache:3art-hmBPRIJ:https://www.codecademy.com/forum_questions/51205802e1738f7cce000002+&amp;cd=9&amp;hl=en&amp;ct=clnk&amp;gl=us" onmousedown="return rwt(this,'','','','9','AFQjCNGiEWjfeOL5RBvSIyVsg-lDMMrU8g','YqfskRg-sa91JCIncDiz1w','0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQIAhYMAg','','',event)"
                    target="_blank">Cached</a>
                  </li>
                </ul>
              </div>
            </div>
            <div class="crc">
              <div class="crl" data-async-context="res:8;ri:;site:codecademy.com" data-async-trigger="cra-8-filled" jsaction="crd.tglpop" data-ved="0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQ5CsIWTAI">Codecademy<span class="_Bs"></span>
              </div>
              <div class="cri" jsaction="crd.popclk">
                <div id="cra-8-filled" data-jiis="up" data-async-type="cra" data-async-context-required="site,ri,res" class="y yp" jsaction="asyncFilled:crd.rmload"></div>
                <div class="cr-load">Loading...</div>
              </div>
            </div>
          </div><span class="st">I'm trying to move all this code to my local machine, but I cannot get the script.js to run. I put the HTML, CSS, and JS in the same folder, and it looks like the HTML&nbsp;...</span>
        </div>
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    <!--n-->
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    <!--m-->
    <div class="rc" data-hveid="90">
      <h3 class="r"><a href="https://www.codecademy.com/forum_questions/55be6dd5d3292f851a00067c" onmousedown="return rwt(this,'','','','10','AFQjCNFS1Z_TSMznAYbCtapBeisdAsWmuA','wm1RcWplcb6J_e6PXz9Xww','0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQFghbMAk','','',event)" target="_blank">one of function in jQuery .on() | Codecademy</a></h3>
      <div class="s">
        <div>
          <div class="f kv _SWb" style="white-space:nowrap"><cite class="_Rm">https://www.codecademy.com/.../55be6dd5d3292f851a000...</cite>
            <div class="action-menu ab_ctl">
              <a class="_Fmb ab_button" href="#" id="am-b9" aria-label="Result details" aria-expanded="false" aria-haspopup="true" role="button" jsaction="m.tdd;keydown:m.hbke;keypress:m.mskpe" data-ved="0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQ7B0IXDAJ"><span class="mn-dwn-arw"></span>
              </a>
              <div class="action-menu-panel ab_dropdown" role="menu" tabindex="-1" jsaction="keydown:m.hdke;mouseover:m.hdhne;mouseout:m.hdhue" data-ved="0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQqR8IXTAJ">
                <ul>
                  <li class="action-menu-item ab_dropdownitem" role="menuitem"><a class="fl" href="http://webcache.googleusercontent.com/search?q=cache:l4osBjpDoeoJ:https://www.codecademy.com/forum_questions/55be6dd5d3292f851a00067c+&amp;cd=10&amp;hl=en&amp;ct=clnk&amp;gl=us" onmousedown="return rwt(this,'','','','10','AFQjCNH1_jjMjre3YXyAKeuaBANXAJU00w','DTLCB08h3zoDEpPplWsvDA','0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQIAheMAk','','',event)"
                    target="_blank">Cached</a>
                  </li>
                </ul>
              </div>
            </div>
            <div class="crc">
              <div class="crl" data-async-context="res:9;ri:;site:codecademy.com" data-async-trigger="cra-9-filled" jsaction="crd.tglpop" data-ved="0ahUKEwjxka_JkKLJAhWFHT4KHbPJCYUQ5CsIXzAJ">Codecademy<span class="_Bs"></span>
              </div>
              <div class="cri" jsaction="crd.popclk">
                <div id="cra-9-filled" data-jiis="up" data-async-type="cra" data-async-context-required="site,ri,res" class="y yp" jsaction="asyncFilled:crd.rmload"></div>
                <div class="cr-load">Loading...</div>
              </div>
            </div>
          </div><span class="st">Can someone explain what ".on()" it is and how it works in <em>jQuery</em>? The explanation on preview on 13/14 Modifying HTML Elements, I do not really understand it&nbsp;...</span>
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关于javascript - 在导航栏中将 parents() 显示为 html，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33846887/

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javascript - 在导航栏中将 parents() 显示为 html