input 和 select 在同一行中具有不同的垂直位置-PHP中文网问答

我使用此网站的浮动标签。我稍微修改了代码，将输入和选择放在一行中。在 Edge 版本 114.0.1823.67 和 Chrome 版本 114.0.5735.199 中，基线具有不同的垂直位置。在 Firefox 版本 115.0 中，基线具有相同的垂直位置。代码：

@import url('https://fonts.google.com/specimen/Lato?selection.family=Lato');
 :root {
  --main-color: #ee6e73;
  --second-color: #333;
  --input-color: #9e9e9e;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: 'Lato', sans-serif;
  background-color: #fcfcfc;
  flex-direction: column;
}

form {
  padding: 20px 40px;
}

form h1 {
  color: var(--second-color);
  letter-spacing: 1px;
  margin: 10px 0px;
}

.form-group {
  position: relative;
  padding: 20px 0;
  width: 300px;
  max-width: 100%;
}

.form-group input,
select {
  background-color: transparent;
  border: none;
  border-bottom: 1px solid var(--input-color);
  color: var(--second-color);
  font-size: 16px;
  padding: 10px 0;
  display: block;
  width: 100%;
}

.form-group label {
  color: var(--input-color);
  font-size: 16px;
  font-weight: 100;
  position: absolute;
  pointer-events: none;
  top: 0;
  transform: translateY(30px);
  transition: all 0.2s ease-in-out;
  left: 0px;
}

.form-group input:focus,
.form-group select:focus {
  border-bottom-color: var(--main-color);
  outline: none;
}

.form-group input:valid+label,
.form-group input:focus+label {
  color: var(--main-color);
  font-size: 14px;
  transform: translateY(0);
}

input[type="button"] {
  background-color: var(--main-color);
  border: 2px solid var(--main-color);
  border-radius: 2px;
  box-sizing: border-box;
  color: #fff;
  cursor: pointer;
  font-size: 16px;
  padding: 15px 0;
  margin-top: 15px;
  width: 100%;
}

input[type="button"]:hover {
  background-color: #fff;
  color: var(--main-color);
}

input[type="button"]:active {
  border-color: #fff;
}

input[type="button"]:focus {
  outline: none;
}

<form>
  <h1>CSS Floating Labels</h1>
  <fieldset>
    <div style="display: flex; flex-direction: row; justify-content: flex-start;">
      <div class="form-group">
        <input type="text" required/>
        <label>Username</label>
      </div>
      <div class="form-group">
        <select>
          <option value="">Test</option>
        </select>
      </div>
      <div class="form-group">
        <input type="password" required/><label>Password</label>
      </div>
    </div>
  </fieldset>
  <input type="button" value="Submit" />
</form>

我尝试用vertical-position:bottom解决它，但不幸的是没有成功。

@import url('https://fonts.google.com/specimen/Lato?selection.family=Lato'); :root { --main-color: #ee6e73; --second-color: #333; --input-color: #9e9e9e; } html, body, * { margin: 0; padding: 0; box-sizing: border-box; font-size: 16px; } body { height: 100vh; /* assumed you want to super center the form */ display: grid; /* same as center of both align/justify ref https://developer.mozilla.org/en-US/docs/Web/CSS/place-items */ place-items: center; font-family: 'Lato', sans-serif; background-color: #fcfcfc; } .form-form { padding-top: 1.25em; padding-bottom: 1.25em; padding-left: 1.5em; padding-right: 1.5em; display: grid; grid-template-columns: 1fr; /* fieldset takes whatever space is left over - 1fr */ grid-template-rows: auto 1fr 1em auto; grid-template-areas: "formheader" "forminputs" "." "formbutton"; align-items: center; border: solid cyan 1px; width: 100%; } .form-form .form-header { grid-area: formheader; color: var(--second-color); letter-spacing: 1px; margin-top: 0.625em; margin-bottom: 0.625em; } .fieldset-container { grid-area: forminputs; display: grid; grid-template-rows: 1fr; /* width of each field/column */ grid-template-columns: repeat(3, 18.75em); border-bottom: 1px solid var(--input-color, #00FF00); padding-bottom: 0.5em; margin-bottom: 0.5em; } .form-group { padding-top: 1.25em; /*padding-bottom: 1.25em;*/ display: grid; grid-template-columns: [only-one] 1fr; grid-template-rows: [form-things] auto 1fr; /* we COULD use the areas but we want to put them in the same line */ grid-template-areas: "labels" "inputs"; } .form-group .form-group-label { /* could also use the named line/row */ grid-area: labels; padding-top: 1.25em; padding-bottom: 1.25em; color: var(--input-color); font-weight: 100; pointer-events: none; background-color: transparent; } .form-group .form-group-input { /* we named the line/column so use that not the "area" name */ /* grid-area: inputs;*/ grid-row-start: form-things; grid-column-start: only-one; background-color: transparent; border: none; color: var(--second-color); padding-top: 1.25em; padding-bottom: 1.25em; } .form-group .form-group-input:focus, { border-bottom-color: var(--main-color); outline: none; } .form-group .form-group-input:valid~label, .form-group .form-group-input:focus~label { color: var(--main-color); font-size: 0.875em; transform: translateY(0); } .form-button { grid-area: formbutton; background-color: var(--main-color); border: 2px solid var(--main-color); /* made bigger as the 2px did not really show */ border-radius: 0.5em; color: #fff; cursor: pointer; height: 3em; /* moved to grid as a row but not named area "." margin-top: 1em;*/ } .form-button:hover { background-color: #fff; color: var(--main-color); } .form-button:active { border-color: #fff; } .form-button:focus { outline: none; border-color: #00FF00; }

<form class="form-form"> <h1 class="form-header">CSS Floating Labels</h1> <fieldset> <div class="fieldset-container"> <div class="form-group"> <input id="form-input-1" class="form-group-input" type="text" required/> <label for="form-input-1" class="form-group-label">Username</label> </div> <div class="form-group">  <select class="form-group-input"> <option value="">Test</option> <option value="water">Water</option> <option value="milk">Milk</option> </select> </div> <div class="form-group"> <input class="form-group-input" type="password" required/><label class="form-group-label">Password</label> </div> </div> </fieldset> <button class="form-button" type="button">Submit</button> </form>