Detailed explanation of grid spacing and border processing methods in CSS Flex flexible layout

Title: Detailed explanation of grid spacing and border processing methods in CSS Flex flexible layout

Introduction:
CSS Flex flexible layout is a modern page layout This way, web pages can automatically adapt to different screen sizes and be flexible and responsive. When using CSS Flex layout, we often encounter situations where we need to set grid spacing and borders. This article will introduce in detail the grid spacing and border processing methods in CSS Flex elastic layout, and provide specific code examples.

1. How to deal with grid spacing:

1. Use the margin attribute:
   Use the margin attribute to set margins for grid items to achieve the effect of grid spacing. . We can use the following code to set the size of the top, bottom, left, and right margins of the grid item.

.grid-item {
  margin: 10px;
}

In the above code, we set the margins of the grid items to 10px, thus creating a 10px gap between the grid items.

2. Use pseudo-elements:
   Use pseudo-elements to create extra spacing between grid items. We can achieve the spacing effect by inserting ::before or ::after pseudo-elements in the grid container and setting their width and height.

.grid-container::after {
  content: "";
  width: 10px;
  height: 10px;
  display: block;
}

In the above code, we insert a pseudo-element with a width and height of 10px at the end of the grid container, thereby creating a 10px spacing between grid items.

2. Border processing method:

1. Use the border attribute:
   Use the border attribute to set a border for the grid item. We can set the style, width and color of the border for the grid item with the following code.

.grid-item {
  border: 1px solid #000000;
}

In the above code, we set the border width of the grid item to 1px, the border style to solid line, and the border color to black.

2. Use the box-shadow attribute:
   Using the box-shadow attribute can also create a border effect for grid items. We can set the shadow effect of the border for the grid item through the following code, and adjust the horizontal and vertical offset of the shadow to control the width of the border.

.grid-item {
  box-shadow: 0 0 0 1px #000000;
}

In the above code, we set the box-shadow property of the grid item and achieve the border effect by adjusting the width of the shadow to 1px.

Conclusion:
By using the above processing method, we can achieve the effects of grid spacing and borders in CSS Flex elastic layout. You can easily set spacing and borders for grid items, whether using the margin attribute or pseudo-element, border attribute, or box-shadow attribute. These methods provide flexibility and customization, allowing us to adjust and customize according to actual needs.

Code example:

<div class="grid-container">
  <div class="grid-item">网格项1</div>
  <div class="grid-item">网格项2</div>
  <div class="grid-item">网格项3</div>
</div>

.grid-container {
  display: flex;
  flex-wrap: wrap;
}

.grid-item {
  flex: 0 0 calc(33.33% - 20px); /* 设置网格项宽度为33.33%，减去外边距的值 */
  margin: 10px;
  
  /* 设置边框 */
  border: 1px solid #000000;
  
  /* 设置阴影边框 */
  box-shadow: 0 0 0 1px #000000;
}

Through the above code example, we can see the effect of implementing grid spacing and borders in CSS Flex elastic layout. The above code can be adjusted and customized according to actual needs to meet different layout requirements.

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