如何在表单内对齐SVG按钮

Question

我尝试创建一个包含两个输入和一个按钮的表单。我宁愿使用SVG代替文本按钮，但它无法正确对齐。

假设以下CSS和HTML：

body {
  background: #222;
  margin: 25px;
}

form {
  border: 1px solid #444;
  padding: 2px;
}

input {
  border: 1px solid transparent;
  background: #444;
  color: #ddd;
  margin-left: 6px;
  padding: 3px 5px;
}

input:focus {
  outline: 0;
  border: 1px solid #666;
}

button {
  border: 0;
  padding: 0;
  background: transparent;
  margin-left: 6px;
  height: 23px;
  width: 23px;
  fill: #bbb;
}

button:focus {
  outline: 0;
  fill: #ddd;
}

<form>
  <input type="email" id="email" />
  <input type="password" id="password" />
  <button type="submit">
   <svg viewBox="0 0 1024 1024">
    <path d="M384 512h-320v-128h320v-128l192 192-192 192zM1024 0v832l-384 192v-192h-384v-256h64v192h320v-576l256-128h-576v256h-64v-320z" />
   </svg>   
 </button>
</form>

运行代码段时，输入字段在底部对齐，但是SVG按钮在顶部对齐。如果我将SVG替换为文本，则表示对齐。

Answer 1

您需要将button本身与input对齐。我们在vertical-align: middle中的每个元素上使用form来达到相同的目标。

body {
  background: #222;
  margin: 25px;
}

form {
  border: 1px solid #444;
  padding: 2px;
}

form * {
  vertical-align: middle;
}

input {
  border: 1px solid transparent;
  background: #444;
  color: #ddd;
  margin-left: 6px;
  padding: 3px 5px;
}

input:focus {
  outline: 0;
  border: 1px solid #666;
}

button {
  border: 0;
  display: inline-block;
  padding: 0;
  background: transparent;
  margin-left: 6px;
  height: 23px;
  width: 23px;
  fill: #bbb;
}

button:focus {
  outline: 0;
  fill: #ddd;
}

<form>
  <input type="email" id="email" />
  <input type="password" id="password" />
  <button type="submit">
   <svg viewBox="0 0 1024 1024">
    <path d="M384 512h-320v-128h320v-128l192 192-192 192zM1024 0v832l-384 192v-192h-384v-256h64v192h320v-576l256-128h-576v256h-64v-320z" />
   </svg>   
 </button>
</form>

Answer 2

  

只需在选择器中添加 vertical-align：middle; 。

body {
  background: #222;
  margin: 25px;
}

form {
  border: 1px solid #444;
  padding: 2px;
}

input {
  border: 1px solid transparent;
  background: #444;
  color: #ddd;
  margin-left: 6px;
  padding: 3px 5px;
}

input:focus {
  outline: 0;
  border: 1px solid #666;
}

button {
  border: 0;
  padding: 0;
  background: transparent;
  margin-left: 6px;
  height: 23px;
  width: 23px;
  fill: #bbb;
  /*Just add this line to your target element to align in the middle*/
  vertical-align: middle;
}
svg{margin:auto;}
button:focus {
  outline: 0;
  fill: #ddd;
}

<form>
  <input type="email" id="email" />
  <input type="password" id="password" />
  <button type="submit">
   <svg viewBox="0 0 1024 1024">
    <path d="M384 512h-320v-128h320v-128l192 192-192 192zM1024 0v832l-384 192v-192h-384v-256h64v192h320v-576l256-128h-576v256h-64v-320z" />
   </svg>   
 </button>
</form>