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How to use CSS flexbox

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Release： 2018-12-06 11:41:20

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Flexbox (Flexible Box Layout Module) can make various layout adjustments to multiple child elements by writing simple instructions to the parent element. This article will introduce to you how to use How to use CSS How to use CSS How to use CSS flexbox in CSS.

How to use CSS How to use CSS How to use CSS flexbox

Set Flexbox as the parent element, this is a very important point. Start by entering the parent element of the item you want to apply as shown below.

display: flex;

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To apply to inline elements, enter the following.

display：inline-flex;

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The element written to this will automatically become a "Flex container" and its child elements will be "Flexbox", thus making the Flexbox attribute available. Let's write some typical properties.

Usage of flex-direction

flex-direction is an attribute that can specify the arrangement of content.

Let’s create the following HTML and CSS, change the value of flex-direction in CSS

HTML code

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <link rel="stylesheet" type="text/css" href="style.css">
  </head>
  <body>
    <div class="menu">
      <div class="item">
        1
      </div>
      <div class="item">
        2
      </div>
      <div class="item">
        3
      </div>
      <div class="item">
        4
      </div>
      <div class="item">
        5
      </div>
    </div>
  </body>
</html>

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CSS code

style .css

.menu{
  display: flex;  
  flex-direction: row;
}
.item{
  text-align: center;
  width: 50px;
  height: 20px;
  padding : 3%;
  margin : 3%;
  background-color: #c97796;
  color: white;
}

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When flex-direction is set to row, it is displayed horizontally. The effect is as follows

How to use CSS How to use CSS How to use CSS flexbox

When flex-direction is set to column It is displayed vertically, and the effect is as follows

How to use CSS How to use CSS flexbox

Use of flex-wrap

Use of flex-wrap attribute Specifies the wrapping method for child elements of the How to use CSS How to use CSS How to use CSS flexbox.

Let’s look at a specific example

HTML code is the same as the above example

CSS code

style.css

.menu{
  display: flex;
  flex-direction: row;  
  flex-wrap: nowrap;
}
.item{
  text-align: center;
  width: 50px;
  height: 20px;
  padding : 3%;
  margin : 3%;
  background-color: #c97796;
  color: white;
}

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flex- When the value of wrap is set to nowrap, the effect is as follows

How to use CSS How to use CSS flexbox

When the value of flex-wrap is set to wrap, the effect is as follows

How to use CSS How to use CSS How to use CSS flexbox

When the value of flex-wrap is set to wrap-reverse, the effect is as follows

How to use CSS flexbox

Usage of justify-content

justify- content is an attribute that specifies the location of content.

Similarly, let’s set each value of justify-content

HTML code is the same as above

CSS code

style.css

.menu{
  display: flex;
  flex-direction: row;  
  justify-content: flex-start;
}
.item{
  text-align: center;
  width: 50px;
  height: 20px;
  padding : 3%;
  margin : 3%;
  background-color: #c97796;
  color: white;
}

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When the value of justify-content is set to flex-start, it is left aligned. The effect is as follows

When it is horizontal, it is left aligned, and when it is vertical, it is top Alignment.

How to use CSS How to use CSS flexbox