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CSS

Ji Jiang
Ji Jiang
2,505 Points
Posted by Ji Jiang
Ji Jiang
2,505 Points

overflow: hidden

Hi, Please see the html code below:

<div class="wrap">`
 ` <header class="main-header">`
    `<a class="logo" href="#">Logo</a>`
    `<nav class="nav">`
    `  <a href="#">Link 1</a>`
      `<a href="#">Link 2</a>`
      `<a href="#">Link 3</a>`
     ` <a href="#">Link 4</a>`
     ` <a href="#">Link 5</a>`
    `</nav>`
 ` </header>`
  <div class="content">
    <div class="main col">main</div>
    <div class="secondary col">Secondary</div>
    <div class="extra col">Extra</div>
 </div>
 <footer class="footer">
    Footer
</footer>
</div>

` In my css, I have to specify the overflow property of .main-header and .content to hidden, like this:

.wrap{
margin: auto;
width: 90%;
}
.logo, .nav a{
display:inline-block;
text-decoration:none;
color: inherit;
}
.main-header, .content{
overflow: hidden;
} 
.col{
height: 200px;
}
.main-header, .col, .footer{
padding: 2.15%;
border-radius: 5px;
margin-bottom: 15px;
}
@media only screen and (min-width: 769px) {
.logo {
float: left;
}
.nav{
float: right;}
.main {
width: 40.425531914894%;
}
.extra {
display: block;
width: 23.404255319149%;}}

Otherwise the main-header will collapse if I float log and nav and the content will behave very wield. Can you please let me know why?

Thank you!

2 Answers

Andrew Stelmach
Andrew Stelmach
12,583 Points
Andrew Stelmach
Andrew Stelmach
12,583 Points

Could you post the rest of your CSS, please?

Ji Jiang
Ji Jiang
2,505 Points
Ji Jiang
Ji Jiang
2,505 Points

Thank you! I have just added the rest of the CSS.

Jason Anello
PLUS
Jason Anello
Courses Plus Student 94,610 Points
Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi Ji Jiang ,

Normally a parent element will not contain it's floated children. It will collapse to zero height if all it contains is floated children. You don't necessarily have to fix this but in some cases you may have a background or a border applied to the parent which won't show up if it collapses to zero height.

Setting overflow: hidden is one trick to make a parent contain the floated children. The micro-clearfix hack is another one. You can also float the parent too, although I'm not sure if this works in all situations. Floating the parent is done in the "How to Make a Website" course here on treehouse. The header is floated because it contains floated children and this keeps it from collapsing.