HTML && CSS 输入边框移动

Question

我有问题。我正在 HTML 和 CSS 中制作注册表。我在输入的焦点上放置了一个边框（单击后，会出现输入周围的边框），但随后另一个输入开始四处移动。我怎样才能修复那个动作？这是我的代码：

input {
  width: 450px;
  height: 3.5vh;
  margin-bottom: 1rem;
  outline: none;
  color: white;
  border: 1px solid rgba(170, 170, 170, 0.3);
  background: rgba(0, 0, 0, 0.5);
  font-family: 'Poppins', sans-serif;
  font-weight: bold;
  border-radius: 3px;
}

input:focus {
  border: 2px solid blueviolet;
  outline: none!important;
}

<div class="inputs">
  <input type="text" placeholder="User Name" name="name">
</div>
<div class="inputs">
  <input type="email" placeholder="Email" name="email">
</div>
<div class="inputs">
  <input type="password" placeholder="Password" name="password">
</div>
<div class="inputs">
  <input type="password" placeholder="Confirm Password" name="confirmit">
</div>
<span class="img-text">Choose avatar: </span>
<input type="file" id="img" accept="image/*" style="border: none!important; background: none!important;">
<button class="register" type="submit" name="register">Register</button>

非常感谢帮助。

Answer 1

发生这种情况是因为您在焦点上添加了边框，但最初输入标签中没有边框，这就是您在 UI 中面临波动的原因。

要修复在输入中添加边框属性以及透明度。

input {
    width: 450px;
    height: 3.5vh;
    margin-bottom: 1rem;
    outline: none;
    color: white;
    background: rgba(0, 0, 0, 0.5);
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
    border-radius: 3px;
    border: solid 2px transparent;
}

Answer 2

在默认 input 样式中，您已将 border-width 设置为 1px。

但是在聚焦时，您已将 border-width 设置为 2px。由于这个增量，输入的宽度和高度在焦点时增加。

因此需要将 border-width 设置为相同的默认值和焦点，如下所示。

在下面的代码片段中，我已将默认 input 样式 border-width 设置为 2px，与聚焦输入相同。

input {
  width: 450px;
  height: 3.5vh;
  margin-bottom: 1rem;
  outline: none;
  color: white;
  border: 2px solid rgba(170, 170, 170, 0.3);
  background: rgba(0, 0, 0, 0.5);
  font-family: 'Poppins', sans-serif;
  font-weight: bold;
  border-radius: 3px;
}

input:focus {
  border: 2px solid blueviolet;
  outline: none!important;
}

<div class="inputs">
  <input type="text" placeholder="User Name" name="name">
</div>
<div class="inputs">
  <input type="email" placeholder="Email" name="email">
</div>
<div class="inputs">
  <input type="password" placeholder="Password" name="password">
</div>
<div class="inputs">
  <input type="password" placeholder="Confirm Password" name="confirmit">
</div>
<span class="img-text">Choose avatar: </span>
<input type="file" id="img" accept="image/*" style="border: none!important; background: none!important;">
<button class="register" type="submit" name="register">Register</button>

Answer 3

input {
  width: 450px;
  height: 3.5vh;
  margin-bottom: 1rem;
  outline: none;
  color: white;
  border: 1px solid rgba(170, 170, 170, 0.3);
  background: rgba(0, 0, 0, 0.5);
  font-family: 'Poppins', sans-serif;
  font-weight: bold;
  border-radius: 3px;
  border: 2px solid transparent; /* input has border 2px when it has focus that's why here border 2px */
}

input:focus {
  border: 2px solid blueviolet;
  outline: none!important;
}

Answer 4

我检查了你的代码，默认边框大小为 1px，当它聚焦时，你将边框大小设置为 2px，这就是其他输入移动的原因。

/*either change input initial border size to 2px like/*
 input {
      width: 450px;
      height: 3.5vh;
      margin-bottom: 1rem;
      outline: none;
      color: white;
      border: 2px solid rgba(170, 170, 170, 0.3);
      background: rgba(0, 0, 0, 0.5);
      font-family: 'Poppins', sans-serif;
      font-weight: bold;
      border-radius: 3px;
    }
    /* or change focused input border size to 1px like/*
    input:focus {
      border: 1px solid blueviolet;
      outline: none!important;
    }

Answer 5

如果您想增加边框宽度，则可以改用内嵌框阴影。

此外，最好添加 * { box-sizing: border-box } 以避免此类问题。

* {
  box-sizing: border-box;
}

input {
  width: 450px;
  height: 3.5vh;
  margin-bottom: 1rem;
  outline: none;
  color: white;
  border: none;
  box-shadow: inset 0 0 0 1px rgba(170, 170, 170, 0.3);
  background: rgba(0, 0, 0, 0.5);
  font-family: 'Poppins', sans-serif;
  font-weight: bold;
  border-radius: 3px;
  min-height: 40px;
  padding-left: 10px;
}

input:focus {
  box-shadow: inset 0 0 0 2px blueviolet;
  outline: none!important;
}

<div class="inputs">
  <input type="text" placeholder="User Name" name="name">
</div>
<div class="inputs">
  <input type="email" placeholder="Email" name="email">
</div>
<div class="inputs">
  <input type="password" placeholder="Password" name="password">
</div>
<div class="inputs">
  <input type="password" placeholder="Confirm Password" name="confirmit">
</div>
<span class="img-text">Choose avatar: </span>
<input type="file" id="img" accept="image/*" style="border: none!important; background: none!important;">
<button class="register" type="submit" name="register">Register</button>

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