Burger-Button的Clickarea并不固定为实际的Buttonarea

Question

我不知道菜单按钮的单击区域。出于测试目的，我这次将颜色涂成绿色，因此问题立即显而易见。为什么背景与实际按钮如此扭曲？如何垂直居中？

您必须减少浏览器> 920px才能使用移动版本。

html {
  font-size: calc(1.3em + 1vw)
}

body {
  margin: 0;
  font-family: Helvetica, sans-serif;
  background-color: #fafafa;
}

/* header */

.header {
  overflow: auto;
  position: fixed;
  width: 100%;
  max-width: 30em;
	margin-left: auto;
	margin-right: auto;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .12), 0 1px 2px rgba(0, 0, 0, .24);
  background: #ffb347;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #ffb347, #ffcc33);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #ffb347, #ffcc33); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */ 
}

.header ul {
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
}

.header li a {
  display: block;
  padding: 20px 20px;
  text-decoration: none;
  font-size: 0.7em;
  color: #000;
}

.header li a:hover,
.header .menu-btn:hover {
  background-color: blue;
}

.header .logo {
  display: block;
  float: left;
  font-size: 1.3em;
  line-height: 1.0em;
  padding: 20px 20px;
  text-decoration: none;
  color: #000;
}

.header .logo:hover {
  background-color: blue;
}

/* menu */

.header .menu {
  clear: both;
  max-height: 0;
  transition: max-height .2s ease-out;
}

/* menu icon */

.header .menu-icon {
  cursor: pointer;
  display: inline-block;
  float: right;
  padding-top: 1.2em;
  padding-right: 1em;
  position: relative;
  user-select: none;
  background: green;
}

.header .menu-icon .navicon {
  background: #333;
  display: block;
  height: 7px;
  position: relative;
  transition: background .2s ease-out;
  width: 40px;
}

.header .menu-icon .navicon:before,
.header .menu-icon .navicon:after {
  background: #333;
  content: '';
  display: block;
  height: 100%;
  position: absolute;
  transition: all .2s ease-out;
  width: 100%;
}

.header .menu-icon .navicon:before {
  top: 15px;
}

.header .menu-icon .navicon:after {
  top: -15px;
}

/* menu btn */

.header .menu-btn {
  display: none;
}

.header .menu-btn:checked ~ .menu {
  max-height: 100%;

}

.header .menu-btn:checked ~ .menu-icon .navicon {
  background: transparent;
}

.header .menu-btn:checked ~ .menu-icon .navicon:before {
  transform: rotate(-45deg);
}

.header .menu-btn:checked ~ .menu-icon .navicon:after {
  transform: rotate(45deg);
}

.header .menu-btn:checked ~ .menu-icon:not(.steps) .navicon:before,
.header .menu-btn:checked ~ .menu-icon:not(.steps) .navicon:after {
  top: 0;
}

@media (min-width: 920px) {
  .header .logo {
  font-size: 1.5em;
  line-height: 1.3em;

}
  .header {
    position: relative;
  }
  .header li {
    float: left;   
  }
  .header li a {
    padding: 20px 30px;
    line-height: 2.8em;
  }
  .header .menu {
    clear: none;
    float: right;
    max-height: none;
  }
  .header .menu-icon {
    display: none;
  }
}

<div class="header">
    <a href="" class="logo">LOREM <b>IPSUM</b></a>
    <input class="menu-btn" type="checkbox" id="menu-btn" />
    <label class="menu-icon" for="menu-btn"><span class="navicon"></span></label>
    <ul class="menu">
      <li><a href="#work">Lorem</a></li>
      <li><a href="#about">Ipsum</a></li>
      <li><a href="#careers">Dolor</a></li>
      <li><a href="#contact">Set</a></li>
      <li><a href="#contact">Amit</a></li>
    </ul>
  </div>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>

Answer 1

发生了什么事：标题高度是根据“ LOREN IPSUM”的填充和垂直文本大小自动计算的。标签不知道该标签，您必须在背景之后（或代替背景）添加：绿色以下内容之一

height: calc(1em + 16px);
padding-bottom: calc(1.2em + 3.5px);

像素调整是不直观的，我会在em中将显式高度设置为header，并对标签执行相同的操作。

Answer 2

您可以在标签中添加它。

style =“ width：20px; height：43px”

这将放大可单击区域。

html {
  font-size: calc(1.3em + 1vw)
}

body {
  margin: 0;
  font-family: Helvetica, sans-serif;
  background-color: #fafafa;
}

/* header */

.header {
  overflow: auto;
  position: fixed;
  width: 100%;
  max-width: 30em;
	margin-left: auto;
	margin-right: auto;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .12), 0 1px 2px rgba(0, 0, 0, .24);
  background: #ffb347;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #ffb347, #ffcc33);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #ffb347, #ffcc33); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */ 
}

.header ul {
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
}

.header li a {
  display: block;
  padding: 20px 20px;
  text-decoration: none;
  font-size: 0.7em;
  color: #000;
}

.header li a:hover,
.header .menu-btn:hover {
  background-color: blue;
}

.header .logo {
  display: block;
  float: left;
  font-size: 1.3em;
  line-height: 1.0em;
  padding: 20px 20px;
  text-decoration: none;
  color: #000;
}

.header .logo:hover {
  background-color: blue;
}

/* menu */

.header .menu {
  clear: both;
  max-height: 0;
  transition: max-height .2s ease-out;
}

/* menu icon */

.header .menu-icon {
  cursor: pointer;
  display: inline-block;
  float: right;
  padding-top: 1.2em;
  padding-right: 1em;
  position: relative;
  user-select: none;
  background: green;
}

.header .menu-icon .navicon {
  background: #333;
  display: block;
  height: 7px;
  position: relative;
  transition: background .2s ease-out;
  width: 40px;
}

.header .menu-icon .navicon:before,
.header .menu-icon .navicon:after {
  background: #333;
  content: '';
  display: block;
  height: 100%;
  position: absolute;
  transition: all .2s ease-out;
  width: 100%;
}

.header .menu-icon .navicon:before {
  top: 15px;
}

.header .menu-icon .navicon:after {
  top: -15px;
}

/* menu btn */

.header .menu-btn {
  display: none;
}

.header .menu-btn:checked ~ .menu {
  max-height: 100%;

}

.header .menu-btn:checked ~ .menu-icon .navicon {
  background: transparent;
}

.header .menu-btn:checked ~ .menu-icon .navicon:before {
  transform: rotate(-45deg);
}

.header .menu-btn:checked ~ .menu-icon .navicon:after {
  transform: rotate(45deg);
}

.header .menu-btn:checked ~ .menu-icon:not(.steps) .navicon:before,
.header .menu-btn:checked ~ .menu-icon:not(.steps) .navicon:after {
  top: 0;
}

@media (min-width: 920px) {
  .header .logo {
  font-size: 1.5em;
  line-height: 1.3em;

}
  .header {
    position: relative;
  }
  .header li {
    float: left;   
  }
  .header li a {
    padding: 20px 30px;
    line-height: 2.8em;
  }
  .header .menu {
    clear: none;
    float: right;
    max-height: none;
  }
  .header .menu-icon {
    display: none;
  }
}

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bluebird/1.2.2/bluebird.js"></script>
 
  <title>JS Bin</title>
</head>
<body>
<div class="header">
    <a href="" class="logo">LOREM <b>IPSUM</b></a>
    <input class="menu-btn" type="checkbox" id="menu-btn" />
    <label style="width:20px;height:43px" class="menu-icon" for="menu-btn"><span class="navicon"></span></label>
    <ul class="menu">
      <li><a href="#work">Lorem</a></li>
      <li><a href="#about">Ipsum</a></li>
      <li><a href="#careers">Dolor</a></li>
      <li><a href="#contact">Set</a></li>
      <li><a href="#contact">Amit</a></li>
    </ul>
  </div>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
</body>
</html>