CSS / HTML-Flexbox-中心响应元素

分类：编程问答

如何解决CSS / HTML-Flexbox-中心响应元素

我正在尝试实现一个响应页面。我设法得到了以下结果，但是我希望所有盒子（徽标|链接| ic |面包屑）都具有其父母的全高/全宽。这些框还应该完全填充可用空间。

enter image description here

小提琴链接

我尝试过的

  • 使用<nav><a/><nav>属性从标头强制min-height占用全部空间，但它破坏了Flexbox align-items: center;属性。

所需的输出

  • 我所有的Flexbox子项看起来都像左上方的蓝色框，而没有破坏align-items: center;属性。

    • 标头中的

  • 所有<nav><a/></nav>垂直和水平居中，同时占用了整个可用空间。

  • 面包屑项目在垂直和水平方向都居中，同时占用了所有可用空间。

html,body { height: 100%; }
body {
  margin: 0;
  overflow-wrap: break-work;
  }

.root {
  max-width: 1200px;
  height: 100%;
  margin: auto;
}

.header {
  /* FLEX */
  display: flex;
  align-items: center;
  
  /* OTHERS PROPS */
  height: 80px;
  background-color: yellow;
  text-align: center;
  
  /* set a solid border inside the header and not on its edge */
  box-sizing: border-box;
  border-bottom: 3px solid black;
}

.header-child-1 {
  /* FLEX */
  flex: 3;
  
  /* OTHERS PROPS */
  min-height: 80px; /* ERROR : using min-height property breaks align-items */
  background-color: blue;
}

.header-child-2 {
  /* FLEX */
  flex: 5;
  
  /* OTHERS PROPS */
  background-color: white;
}

.header-child-3 {
  /* FLEX */
  flex: 3;
  
  /* OTHERS PROPS */
  background-color: red;
}

.main {
  /* FLEX */
  display: flex;
  align-items: stretch;
  flex-direction: column;
  
  /* OTHERS PROPS */
  height: calc(100vh - 80px);
  background-color: green;
}

.main-header {
  /* FLEX */
  flex: 1;
  
  /* OTHERS PROPS */
  text-align: center;
  min-height: 40px;
  max-height: 40px;
  background-color: pink;
}

.main-main {
  /* FLEX */
  flex: 1;
  
  /* REMOVE THE GLOBAL PAGE SCROLLBAR,FLEXBOX ADD IT AUTOMATICALLY TO THAT HTML ELEMENT */
  overflow: auto;
  
  /* OTHERS PROPS */
  text-align: justify;
  background-color: purple;
}
<!DOCTYPE html>
<html>
  <body>
    <div class='root'>
      <header class='header'>
        <nav class='header-child-1'>
          <a>Logo</a>
        </nav>
        <nav class='header-child-2'>
          <a>link1</a>
          <a>link2</a>
          <a>link3</a>
        </nav>
        <nav class='header-child-3'>
          <a>ic1</a>
          <a>ic2</a>
          <a>ic3</a>
        </nav>
      </header>

      <main class='main'>
        <header class='main-header'>
          <a>Breadcrumb 1</a>
          <a>Breadcrumb 2</a>
        </header>

        <main class='main-main'>
        content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content content
        </main>
      </main>
    </div>
  </body>
</html>

解决方法

.header{
align-items: stretch;
}

.header-child-1,.header-child-2,.header-child-3{
display: flex;
align-items: center;
justify-content: center;
//remove min-height from .header-child-1
}
    
.header-child-2{
display: flex;
}

.header-child-2 a{
width: 33.333%;
}

.main-header{
display: flex;
align-items: center;
}

.main-header a{
width: 50%;
}

,

尝试在所有需要水平和垂直居中对齐的包装纸上使用display：flex。 

html,body { height: 100%; }
body {
  margin: 0;
  overflow-wrap: break-work;
  }

.root {
  max-width: 1200px;
  height: 100%;
  margin: auto;
}

.header {
  /* FLEX */
  display: flex;
  align-items: center;
  
  /* OTHERS PROPS */
  height: 80px;
  background-color: yellow;
  text-align: center;
  
  /* set a solid border inside the header and not on its edge */
  box-sizing: border-box;
  border-bottom: 3px solid black;
}

.header-child-1 {
  /* FLEX */
  display: flex;
  flex:3;
  justify-content: center;
  align-items: center;
  
  /* OTHERS PROPS */
  min-height: 80px; /* ERROR : using min-height property breaks align-items */
  background-color: blue;
}

.header-child-2 {
  /* FLEX */
  flex: 5;
  
  /* OTHERS PROPS */
  background-color: white;
}

.header-child-3 {
  /* FLEX */
  flex: 3;
  
  /* OTHERS PROPS */
  background-color: red;
}

.main {
  /* FLEX */
  display: flex;
  align-items: stretch;
  flex-direction: column;
  
  /* OTHERS PROPS */
  height: calc(100vh - 80px);
  background-color: green;
}

.main-header {
  /* FLEX */
  display: flex;
  justify-content: center;
  align-items: center;
  
  /* OTHERS PROPS */
  text-align: center;
  min-height: 40px;
  max-height: 40px;
  background-color: pink;
}

.main-main {
  /* FLEX */
  flex: 1;
  
  /* REMOVE THE GLOBAL PAGE SCROLLBAR,FLEXBOX ADD IT AUTOMATICALLY TO THAT HTML ELEMENT */
  overflow: auto;
  
  /* OTHERS PROPS */
  text-align: justify;
  background-color: purple;
  color: white;
}
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width,initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
  </head>
  <body>
    <div class="root">
      <header class="header">
        <nav class="header-child-1"><a>Logo</a></nav>
        <nav class="header-child-2"><a>link1</a> <a>link2</a> <a>link3</a></nav>
        <nav class="header-child-3"><a>ic1</a> <a>ic2</a> <a>ic3</a></nav>
      </header>

      <main class="main">
        <header class="main-header">
          <a>Breadcrumb 1</a> <a>Breadcrumb 2</a>
        </header>

        <main class="main-main">
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
          content content content content content content content content
        </main>
      </main>
    </div>
  </body>
</html>

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