如何使用 CSS 左右對齊 Flexbox 欄位？-css教學-PHP中文網

如何使用 CSS 左右对齐 Flexbox 列？

Flexbox是CSS中的一個強大的佈局系統，它使得網頁開發者能夠創建響應式和靈活的網頁設計。由於它能夠輕鬆地在容器內對元素進行對齊和組織，它已經成為建立現代網站的流行選擇。然而，對齊flexbox列的左右兩側對許多開發者來說是一項挑戰，特別是在處理動態內容或不同列寬度時。

In this article, we will discuss about the various techniques for aligning flexbox columns to the left and right using CSS, including the use of flexbox properties, margin auto, and the align-content property.this the flex , box properties, Byend, auto, and the align-contentperty.this the Byendle of box properties, By. you will have a better understanding of how to create flexible and responsive layouts that align flexbox columns to meet your design needs.

Creating Flexbox Columns

要建立flexbox列，您需要在CSS中使用flexbox佈局系統。以下是建立flexbox列的步驟−

Create a parent container for the columns.
Set the display property to "flex" for the parent container.
#Create child elements for the columns.
Use flexbox properties to style the columns.

Example

Given below example illustrates on how to create flexbox columns.

<!DOCTYPE html>
<html>
<head>
   <style>
      .flex-container {
         display: flex;
         background-color: cyan;
         height: 200px;
         width: 80%;
      }
      .flex-item {
         flex-basis: 33%;
         background-color: red;
         width: 50px;
         margin: 30px;
         text-align: center;
         letter-spacing: 1px;
      }
   </style>
</head>
<body>
   <h1>Flexbox Columns</h1>
   <div class="flex-container">
      <div class="flex-item"> Column 1 </div>
      <div class="flex-item"> Column 2 </div>
      <div class="flex-item"> Column 3 </div>
      <div class="flex-item"> Column 4 </div>
   </div>
</body>
</html>

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Methods to Align Flexbox Columns Left and Right

使用CSS將flexbox列左右對齊可以透過多種技術實現。以下是一些最有效的方法−

To align columns to the left, set the "align-content" property of the flex container to "flex-start". This property aligns the content to the left side of the container.

Example

以下範例示範了將flexbox列向左對齊。

<!DOCTYPE html>
<html>
<head>
   <style>
      .flex-container {
         display: flex;
         background-color: cyan;
         height: 200px;
         width: 100%;
         flex-flow: column wrap;
         align-content: flex-start;
      }
      .flex-item {
         flex-basis: 20%;
         background-color: red;
         width: 100px;
         margin: 30px;
         text-align: center;
         letter-spacing: 1px;
      }
   </style>
</head>
<body>
   <h1>Flexbox Columns</h1>
   <div class="flex-container">
      <div class="flex-item"> Column 1 </div>
      <div class="flex-item"> Column 2 </div>
      <div class="flex-item"> Column 3 </div>
      <div class="flex-item"> Column 4 </div>
      <div class="flex-item"> Column 5 </div>
      <div class="flex-item"> Column 6 </div>
      <div class="flex-item"> Column 7 </div>
      <div class="flex-item"> Column 8 </div>
   </div>
</body>
</html>

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Aligning Right

To align columns to the right, set the "align-content" property of the flex container to "flex-end". This property aligns the content to the right side of the container.

CSS範例

.flex-container {
   display: flex;
   background-color: cyan;
   height: 200px;
   width: 100%;
   flex-flow: column wrap;
   align-content: flex-end;
}
.flex-item {
   flex-basis: 20%;
   background-color: red;
   width: 100px;
   margin: 30px;
   text-align: center;
   letter-spacing: 1px;
}

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使用Margin Auto

要將欄位向左對齊，將最後一個彈性項目的 "margin-right" 屬性設為 "auto"。這將把項目推到容器的左側。

Example

To align columns to the right, set the "margin-left" property of the first flex item to "auto". This will push the item to the right side of the container.

<!DOCTYPE html>
<html>
<head>
   <style>
      .container {
         display: flex;
      }

      .column {
         background-color: orange;
         margin: 10px;
         width: 100px;
         height: 40px;
         text-align: center;
         letter-spacing: 1px;
         padding: 2px;
      }

      .column:last-child {
         margin-right: auto;
      }
   </style>
</head>
<body>
   <div class="container">
      <div class="column"> Column 1 </div>
      <div class="column"> Column 2 </div>
      <div class="column"> Column 3 </div>
      <div class="column"> Column 4 </div>
      <div class="column"> Column 5 </div>
   </div>
</body>
</html>

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同時左右對齊

Till now we have aligned the columns towards left or right of the flex container. Now, let’s align them to both left and right simultaneously.

To align columns to the left and right, set the "align-content" property of the flex container to "space-between". This property aligns the content to the left as well as right side of the container.

Example

The following example demonstrates aligning flexbox columns towards left and right.

<!DOCTYPE html>
<html>
<head>
   <style>
      .flex-container {
         display: flex;
         background-color: cyan;
         height: 200px;
         width: 100%;
         flex-flow: column wrap;
         align-content: space-between;
      }
      .flex-item {
         flex-basis: 20%;
         background-color: red;
         width: 100px;
         text-align: center;
         letter-spacing: 1px;
      }
   </style>
</head>
<body>
   <div class="flex-container">
      <div class="flex-item"> Column 1 </div>
      <div class="flex-item"> Column 2 </div>
      <div class="flex-item"> Column 3 </div>
      <div class="flex-item"> Column 4 </div>
      <div class="flex-item"> Column 5 </div>
      <div class="flex-item"> Column 6 </div>
      <div class="flex-item"> Column 7 </div>
      <div class="flex-item"> Column 8 </div>
      <div class="flex-item"> Column 9 </div>
      <div class="flex-item"> Column 10 </div>
   </div>
</body>
</html>

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In the above example, the "align-content" property is set to "space-between", which creates equal spacing between columns.