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html - Margin top on div inside another wrapper div

问题描述:

I'm just new to front end coding, I am facing some problems about the margin here.

I have a #header div as a base, and other div inside it.

body {

margin: 0;

padding: 0;

}

#header {

max-width: 100%;

height: 135px;

background-color: #ebebeb;

}

#headWrapper {

max-width: 1200px;

height: 85px;

margin: auto;

float: left;

}

.logo {

background-image: url("img/logo.png");

float: left;

width: 350px;

height: 78px;

margin-top: 20px;

}

#naviWrapper {

float: left;

max-width: 530px;

height: 40px;

margin-left: 275px;

font-family: 'Open Sans', sans-serif;

margin-top: 50px;

}

.homeBTN,

.aboutBTN,

.productBTN,

.solutionBTN,

.contactBTN {

float: left;

margin: 5 20;

}

<html>

<head>

<meta name="viewport" content="width=device-width, initial-scale=1">

<link href='http://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>

</head>

<body>

<div id="header">

<div id="headWrapper">

<div class="logo"></div>

<div id="naviWrapper">

<div class="homeBTN">Home</div>

<div class="aboutBTN">About us</div>

<div class="productBTN">Products</div>

<div class="solutionBTN">Solutions</div>

<div class="contactBTN">Contact us</div>

</div>

</div>

</div>

</body>

</html>

网友答案:

There are many problems with your code.

Summary of the changes:

  1. Remove all margins, floats and heights.
  2. For the navigation links use the <a href=""></a> instead of divs and consider having ul li a structure.
  3. Then to position the navigation vertically in the middle:

    • Add to #header container a display: table;
    • Add to #headWrapper a display: table-cell; vertical-align: middle;
  4. To align the navigation's text in the middle use text-align: center;

Code:

body {
  margin: 0;
  padding: 0;
}
#header {
  display: table;
  max-width: 100%;
  height: 135px;
  background-color: #ebebeb;
  width: 100%;
}
#headWrapper {
  display: table-cell;
  vertical-align: middle;
  width: 100%;
  height: 40px;
  font-family: 'Open Sans', sans-serif;
  text-align: center;
}
#naviWrapper a {
  text-decoration: none;
  padding: 10px;
}
#naviWrapper ul li {
  list-style: none;
  display: inline-block;
}
.logo {
  background-image: url("img/logo.png");
  float: left;
}
<html>

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href='http://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
</head>

<body>
  <div id="header">
    <div id="headWrapper">
      <div class="logo"></div>
      <nav id="naviWrapper">
        <ul>
          <li><a href="#">Home</a>
          </li>
          <li><a href="#">About us</a>
          </li>
          <li><a href="#">Products</a>
          </li>
          <li><a href="#">Solutions</a>
          </li>
          <li><a href="#">Contact</a>
          </li>
        </ul>
      </nav>
    </div>
  </div>
</body>

</html>
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