当周围的元素增长时，伪元素的大小会减小

Question

我有以下标签和复选框代码，当标签内容很短时，看起来很完美：

但是，当标签变长时，复选框被“压扁”并且勾号不再在其中对齐，我如何使用 flex 创建一个更通用的解决方案？

.outter-wrapper {
  width: 200px;
  border: 1px solid black;
}

.wrapper {
  display: inline-flex;
  min-height: 1.5rem;
  padding: 8px 24px 8px 0px;
  width: 100%;
}

.input {
  position: absolute;
  z-index: -1;
  visibility: hidden;
}

.label-wrapper {
 line-height: 1.5rem;
}


.label {
  position: relative;
  margin-bottom: 0;
  display: flex;
  margin-left: 0;
  margin-right: 24px;
  flex-direction: row-reverse;
  justify-content: space-between;
  flex: 1;
  align-items: center;

}

.label:before {
  display: block;
  width: 20px;
  height: 20px;
  content: "";
  background-color: #fff;
  border: 1px solid black;
  border-radius: 4px;
  flex: none;
}

.label:after {
  position: absolute;
  display: block;
  height: 20px;
  content: "";
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 80%;
}

input[type="checkbox"]:checked~.label::after {
  background-image: url("https://cdn-icons-png.flaticon.com/512/447/447147.png");
  width: 20px;
  height: 20px;
  top: 0;
}

<div class="outter-wrapper">  
  <div class="wrapper">
    <input class="input" name="checkbox2" id="checkbox2"        type="checkbox">
    <label class="label" for="checkbox2">
      <div class="label-wrapper">
        Option 1Option 1Option 1Option 1Option 1
      </div>  
    </label>
  </div>
</div>

我知道 flex-wrap 可能是正确的方法，但不确定是否可以考虑使用 :before 创建“复选框”?

Answer 1

如果您想为弹性容器内的元素设置固定宽度，则需要 flex : none。希望它能解决你的问题。

.outter-wrapper {
  width: 200px;
  border: 1px solid black;
}

.wrapper {
  display: inline-flex;
  min-height: 1.5rem;
  padding: 8px 24px 8px 0px;
  width: 100%;
}

.input {
  position: absolute;
  z-index: -1;
  visibility: hidden;
}

.label-wrapper {
 line-height: 1.5rem;
}


.label {
  position: relative;
  margin-bottom: 0;
  display: flex;
  margin-left: 0;
  margin-right: 24px;
  flex-direction: row-reverse;
  justify-content: space-between;
  flex: 1;
  align-items: center;

}

.label:before {
  display: block;
  width: 20px;
  height: 20px;
  content: "";
  background-color: #fff;
  border: 1px solid black;
  border-radius: 4px;
  /* a line I added*/
  flex:none;
}

.label:after {
  position: absolute;
  display: block;
  height: 20px;
  content: "";
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 80%;
}

input[type="checkbox"]:checked~.label::after {
  background-image: url("https://cdn-icons-png.flaticon.com/512/447/447147.png");
  width: 20px;
  height: 20px;
  top: 0;
}

<div class="outter-wrapper">  
  <div class="wrapper">
    <input class="input" name="checkbox2" id="checkbox2"        type="checkbox">
    <label class="label" for="checkbox2">
      <div class="label-wrapper">
        Option 1Option 1Option 1Option 1Option 1
      </div>  
    </label>
  </div>
</div>

Answer 2

试试这个代码：

.outter-wrapper {
  width: 200px;
  border: 1px solid black;
}

.wrapper {
  display: inline-flex;
  min-height: 1.5rem;
  padding: 8px 24px 8px 0px;
  width: 100%;
}

.input {
  position: absolute;
  z-index: -1;
  visibility: hidden;
}

.label-wrapper {
 line-height: 1.5rem;
  position: absolute;
  left: 10px;
}


.label {
  position: relative;
  margin-bottom: 0;
  display: flex;
  margin-left: 0;
  margin-right: 24px;
  flex-direction: row-reverse;
  justify-content: space-between;
  flex: 1;
  align-items: center;
}

.label:before {
  display: block;
  min-width: 20px;
  height: 20px;
  content: "";
  background-color: #fff;
  border: 1px solid black;
  border-radius: 4px;
  position:absolute;
  top:0;
}

.label:after {
  position: absolute;
  display: block;
  height: 20px;
  content: "";
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 80%;
}

input[type="checkbox"]:checked~.label::after {
  background-image: url("https://cdn-icons-png.flaticon.com/512/447/447147.png");
  width: 20px;
  height: 20px;
  top: 0;
}

<div class="outter-wrapper">  
  <div class="wrapper">
    <input class="input" name="checkbox2" id="checkbox2"        type="checkbox">
    <label class="label" for="checkbox2">
      <div class="label-wrapper">
        THis world is full of creatures
      </div>  
    </label>
  </div>
</div>

Codepen link: https://codepen.io/emmeiWhite/pen/LYjKWEw

注意： 可能需要在任何父级上使用 min-height（如果需要），以便文本保留在输入框内

当周围的元素增长时，伪元素的大小会减小

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