两个不同宽度的弹性盒子的免费填充 space

Question

所以我一直在为 select 不同的语言创建一个下拉菜单。代码如下：

//Show DropDown Menu
var button = document.getElementById('select-lang-btn');
var ul = document.getElementById('language_dropdown');
button.onclick = function() {
  if (ul.style.display === 'block') {
    ul.style.display = 'none';
  } else {
    ul.style.display = 'block';
  }
};
//Remove DropDown Menu if clicked outside
window.addEventListener('mouseup', function(event) {
  if (event.target != ul && event.target.parentNode != ul) {
    ul.style.display = 'none';
  }
});
//Select Language
function show(anything) {
  document.getElementById("selected-lang").innerHTML = anything
  document.getElementById('language_dropdown').style.display = 'none';
  if (anything === 'English') {
    document.getElementById("select-lang-img").src = "gb.svg";
  } else if (anything === 'German') {
    document.getElementById("select-lang-img").src = "de.svg";
  } else if (anything === 'Spanish') {
    document.getElementById("select-lang-img").src = "es.svg";
  } else {
    document.getElementById("select-lang-img").src = "global.svg";
  }
}

body {
  background-color: #339699;
}

.language_section {
  width: 500px;
}

.reverse_language {
  width: 200px;
  height: 65px;
  background-color: #afafaf;
}

.language_section>div {
  display: flex;
}

#select-lang-btn {
  display: flex;
  padding: 20px 15px;
  outline: none;
  cursor: pointer;
  background-color: white;
  align-items: center;
}

#selected-lang {
  font-family: "Montserrat", "Open Sans";
  margin-left: 5px;
}

.language_flag {
  width: 24px;
  height: 24px;
}

.language_dropdown {
  padding: 0;
  display: none;
  list-style: none;
  cursor: pointer;
}

.language_dropdown>li>span:hover {
  background-color: #d7d7d7;
}

.language_dropdown>li>span {
  background-color: white;
  display: flex;
  align-items: center;
  padding: 10px;
}

.language_text {
  color: black;
  text-decoration: none;
  padding-left: 10px;
  font-family: "Montserrat", "Open Sans";
}

.language_text {
  line-height: 2;
}

.icon-angle-down {
  margin-top: -30px;
  margin-left: 15px;
  width: 5px;
  height: 5px;
  border-right: 2px solid #444444;
  border-top: 2px solid #444444;
  transform: rotate(135deg);
}

<div style="display:flex; justify-content: center;">
  <div class="language_section">
    <div><span id="select-lang-btn"><img id="select-lang-img" class="language_flag" src="img/flag/gb.svg"><a id="selected-lang">English</a><div class="icon-angle-down"></div></span></div>
    <ul class="language_dropdown" id="language_dropdown">
      <li onclick="show('English')"><span><img class="language_flag" src="img/flag/gb.svg"><a href="#" class="language_text">English</a></span></li>
      <li onclick="show('German')"><span><img class="language_flag" src="img/flag/de.svg"><a href="#" class="language_text">German</a></span></li>
      <li onclick="show('Spanish')"><span><img class="language_flag" src="img/flag/es.svg"><a href="#" class="language_text">Spanish</a></span></li>
    </ul>
  </div>
  <div class="reverse_language"></div>

</div>

使用这段代码我得到以下结果：

但是有免费的 space，我想避免。我尝试了许多不同的方法来摆脱这个问题。我想出的最好办法是删除 .language_section 的 witdth。这是结果：

但是正如您在我的图片中看到的那样，下拉菜单也发生了变化，我也不想这样。有谁知道这个问题的解决方案吗？

Answer 1

您可以将 position: relative 添加到 .language_section

.language_section {
  position: relative;
}

然后将 position: absolute 添加到 .language_dropdown 以从 language_section width

中分离语言列表

.language_dropdown {
  padding: 0;
  display: none;
  list-style: none;
  cursor: pointer;
  position: absolute; /*Detach the current element to not depend on the parent width*/
  width: 250px; /*Width for your language list*/
}

最终结果

注意语言列表我设置了250px，你可以根据自己的需要设置

完整代码

//Show DropDown Menu
var button = document.getElementById('select-lang-btn');
var ul = document.getElementById('language_dropdown');
button.onclick = function() {
  if (ul.style.display === 'block') {
    ul.style.display = 'none';
  } else {
    ul.style.display = 'block';
  }
};
//Remove DropDown Menu if clicked outside
window.addEventListener('mouseup', function(event) {
  if (event.target != ul && event.target.parentNode != ul) {
    ul.style.display = 'none';
  }
});
//Select Language
function show(anything) {
  document.getElementById("selected-lang").innerHTML = anything
  document.getElementById('language_dropdown').style.display = 'none';
  if (anything === 'English') {
    document.getElementById("select-lang-img").src = "gb.svg";
  } else if (anything === 'German') {
    document.getElementById("select-lang-img").src = "de.svg";
  } else if (anything === 'Spanish') {
    document.getElementById("select-lang-img").src = "es.svg";
  } else {
    document.getElementById("select-lang-img").src = "global.svg";
  }
}

body {
  background-color: #339699;
}

.language_section {
  position: relative;
}

.reverse_language {
  width: 200px;
  height: 65px;
  background-color: #afafaf;
}

.language_section>div {
  display: flex;
}

#select-lang-btn {
  display: flex;
  padding: 20px 15px;
  outline: none;
  cursor: pointer;
  background-color: white;
  align-items: center;
}

#selected-lang {
  font-family: "Montserrat", "Open Sans";
  margin-left: 5px;
}

.language_flag {
  width: 24px;
  height: 24px;
}

.language_dropdown {
  padding: 0;
  display: none;
  list-style: none;
  cursor: pointer;
  position: absolute;
  /*Detach the current element to not depend on the parent width*/
  width: 250px;
  /*Width for your language list*/
}

.language_dropdown>li>span:hover {
  background-color: #d7d7d7;
}

.language_dropdown>li>span {
  background-color: white;
  display: flex;
  align-items: center;
  padding: 10px;
}

.language_text {
  color: black;
  text-decoration: none;
  padding-left: 10px;
  font-family: "Montserrat", "Open Sans";
}

.language_text {
  line-height: 2;
}

.icon-angle-down {
  margin-top: -30px;
  margin-left: 15px;
  width: 5px;
  height: 5px;
  border-right: 2px solid #444444;
  border-top: 2px solid #444444;
  transform: rotate(135deg);
}

<div style="display:flex; justify-content: center;">
  <div class="language_section">
    <div><span id="select-lang-btn"><img id="select-lang-img" class="language_flag" src="img/flag/gb.svg"><a id="selected-lang">English</a>
        <div class="icon-angle-down"></div>
      </span></div>
    <ul class="language_dropdown" id="language_dropdown">
      <li onclick="show('English')"><span><img class="language_flag" src="img/flag/gb.svg"><a href="#" class="language_text">English</a></span></li>
      <li onclick="show('German')"><span><img class="language_flag" src="img/flag/de.svg"><a href="#" class="language_text">German</a></span></li>
      <li onclick="show('Spanish')"><span><img class="language_flag" src="img/flag/es.svg"><a href="#" class="language_text">Spanish</a></span></li>
    </ul>
  </div>
  <div class="reverse_language"></div>

</div>

两个不同宽度的弹性盒子的免费填充 space

Filling free space of two flex boxes with different widths

html

css

flexbox