css - 为什么我的按钮左侧的下拉元素不在下方？

Question

我正在尝试在各种类别下创建下拉菜单，但每当我将鼠标悬停在它们上方时，下拉菜单就会出现在按钮的左侧。关于如何修复的任何建议？链接到我下面的代码

这是 jsFiddle 链接:

body {
  margin: 0px;
  overflow-x: hidden;
}

.content {
  font-family: verdana;
  font-size: 30px;
}

.donate {
  background-color: orange;
  border: white;
  color: rgb(255, 255, 255);
  padding: 7px 14px;
  font-size: 15px;
  border-radius: 8px;
}

.donate:hover {
  background-color: rgb(102, 51, 0);
  color: rgb(255, 255, 255);
}

.divnav {
  width: 100%;
  overflow: hidden;
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropbtn {
  font-size: 13px;
  border: none;
  outline: none;
  background-color: inherit;
  float: right;
  display: block;
  margin: 3px 3px 3px 3px;
  font-family: verdana;
  font-weight: 550;
}

.dropbtn:hover {
  color: orange;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
  overflow: auto;
}

.dropdown:hover .dropdown-content {
  display: block;
}

html {}

.image {
  overflow: hidden;
}

.navbar {
  width: 80%;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.navelement {
  float: right;
  display: block;
  margin: 3px 3px 3px 3px;
  font-family: verdana;
  font-size: 13px;
  font-weight: 550;
}

.nava {
  padding: 5px;
}

.nava:hover {
  background-color: white;
  color: orange;
}

.pagetitle {
  height: 68px;
  width: 100%;
  background-image: url("pictures/titlebar1.jpg");
}

.par {
  /* DIV THAT GOES UNDER TODOCONTENT ONLY AND MARKS A PARAGRAPH WITH INFORMATIVE CONTENT*/
}

.parcontent {
  font-family: verdana;
  color: rgb(150, 150, 150);
  font-size: 15px;
}

.titleimage {
  overflow: hidden;
  height: 310px;
  margin: 0px;
  width: 100%;
}

.title {
  font-family: verdana;
  font-size: 50px;
  color: white;
}

.todocontent {
  width: 47%;
  /* A DIV WITH CLASS TODOCONTENT MEANS A DIV THAT WILL CONTAIN ALL INFORMATIVE CONTENT OF THE PAGE*/
}

.wrapper {
  width: 100%;
  height: 5%;
  overflow: hidden;
}

<div class="titleimage">
  <img src="C:\Users\kiran.nair\Desktop\Internship\current\pictures\heading2.jpg" alt="GLI.logo" style="width:100%;height:100%;">
</div>
<div class="divnav">
  <div class="wrapper" style="POSITION: absolute; TOP: 300px; LEFT: 0px;">
    <img src="C:\Users\kiran.nair\Desktop\Internship\current\pictures\wrapper.png" alt="wrapper" style="width:20000px;height:5px;">
  </div>
  <div style="POSITION: relative; TOP: 20px; LEFT: 15%;">
    <img src="C:\Users\kiran.nair\Desktop\Internship\current\pictures\GLI.logo.png" alt="GLI.logo" style="width:145px;height:152px;">
  </div>
  <div style="POSITION: relative; TOP: -20px; LEFT: 10%;">
    <ul class="navbar">
      <div class="dropdown">
        <button class="dropbtn">CONTACT</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 20px;">
          <a href="#">contact</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">RESEARCH</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">research</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">TRIP PREP</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">TRIP PREP</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">UPCOMING EVENTS</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">UPCOMING EVENTS</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">MEDIA</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">MEDIA</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">ENTUSI EVENTS</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">ENTUSI EVENTS</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">PROGRAMS</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">PROGRAMS</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">ABOUT</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">ABOUT</a>
        </div>
      </div>
      <div class="dropdown">
        <button class="dropbtn">HOME</button>
        <div class="dropdown-content" style="POSITION: relative; TOP: 10px;">
          <a href="#">HOME</a>
        </div>
      </div>
    </ul>
  </div>
  <div class="divdonate" style="POSITION: relative; TOP: -140px; LEFT: 80%;">
    <button class="donate">DONATE NOW</button>
  </div>
</div>

<body>

  <div>
    <div class="pagetitle">
      <div>
        <header class="title" style="POSITION: relative; LEFT: 15%">Uganda</header>
      </div>
    </div>
    <div class="todocontent" style="POSItiON: relative; TOP: 15%; LEFT: 15%;">
      <div class="par" style="POSITION: relative; TOP: 15%; LEFT: 0%;">
        <p class="parcontent">
          Uganda was formed from the colonization of the Buganda Kingdom by the British in the 19th century. Britain wanted to protect the viability of the Nile River for its trading potential which prompted the British government to annex Buganda to create the
          Uganda Protectorate in 1894. In 1962 Uganda regained its independence and declared itself a republic with Milton Obote as the first prime minister and former Bugandan King Muteesa as the president. Despite being largely ceremonial, Obote removed
          the presidential position and established a new constitution in which he became a powerful president similar to a dictator. After committing many atrocities Obote was removed from power in a coup orchestrated by General Idi Amin who seized control
          of the country. Amin proceeded to be nearly as atrocious as Obote when almost 500,000 citizens perished under his regime. Despite entering presidency with cheers, his actions made the country of Uganda hate him. After Amin was removed from power
          by largely Tanzanian forces, Obote returned to presidency. A war broke out as a result from the election resulting in the deaths of between 100 and 500,000 people. This compelled 2 military commanders to conduct a coup in which Museveni gained
          control. Yoweri Museveni remains in power till this date."
        </p>
      </div>
    </div>
  </div>

图像不起作用，但应该无关紧要吧？

Answer 1

您应该删除为所有类 .dropdown-content 的元素插入的内联样式。

<div class="dropdown">
    <button class="dropbtn">CONTACT</button>
    <div class="dropdown-content" style="POSITION: relative; TOP: 20px;">
        <a href="#">contact</a>
    </div>
</div>

这称为内联样式。直接写在 html 元素上的样式:

style="POSITION: relative; TOP: 20px;"

接下来，您需要修改 .dropdown-content 的规则:

.dropdown-content{
    /* Your code here */
    top: 100%; 
}