What is relative positioning

Relative positioning is a CSS positioning property that is used to fine-tune the original position of the element in web page layout. Relative positioning does not change the position of the element in the document flow, but adjusts the offset of the element. Move the position to achieve the positioning effect. Detailed introduction: 1. Positioning relative to the original position of the element itself will not affect the position and layout of other elements; 2. It will not break away from the document flow, the element still occupies the original space, but the position is slightly adjusted visually; 3. The position of the element can be adjusted by setting the offset attribute; 4. The offset attribute can accept positive and negative values, etc.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

Relative positioning is a CSS positioning property used to fine-tune the original position of the element in web page layout relative to itself. Relative positioning does not change the position of the element in the document flow, but achieves the positioning effect by adjusting the offset position of the element. Below I will introduce the characteristics and usage of relative positioning in detail.

Characteristics of relative positioning:

1. Relative positioning is positioned relative to the original position of the element itself and will not affect the position and layout of other elements.

2. Relative positioning will not break away from the document flow. The element still occupies the original space, but its position is slightly adjusted visually.

3. Relative positioning can adjust the position of the element by setting the offset attribute (top, right, bottom, left).

4. The offset attribute of relative positioning can accept positive and negative values. Positive values ​​mean moving down or to the right, and negative values ​​mean moving up or left.

Usage of relative positioning:

To use relative positioning, you need to set the `position: relative;` attribute for the element. This enables relative positioning and allows the element to be fine-tuned using the offset property.

Here is an example that shows how to use relative positioning to adjust the position of an element:

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  <style>
    .box {
      width: 200px;
      height: 200px;
      background-color: red;
      position: relative; /* 启用相对定位 */
      top: 20px; /* 向下移动20像素 */
      left: 50px; /* 向右移动50像素 */
    }
  </style>


  <div></div>

In the above example, we created a red box with a width and height of 200px and placed It is set to relative positioning. Then, move the box 20 pixels down and 50 pixels to the right by setting the `top` property to 20px and the `left` property to 50px.

It should be noted that relatively positioned elements still occupy their original position in the document flow, so other elements will not be affected by it. If other elements overlap the relatively positioned element, this can be resolved by adjusting the value of the offset property.

Relative positioning can also be used in combination with other positioning properties (such as absolute positioning and fixed positioning) to achieve more complex layout effects. By setting different positioning and offset properties, you can precisely control the position and layout of elements on the page.

In short, relative positioning is a CSS positioning property used to fine-tune the original position of the element itself in the layout of the web page. By setting the `position: relative;` attribute and offset attributes (such as top, right, bottom, left), the position of the element can be adjusted without affecting the layout of other elements. Relative positioning is very useful when implementing web page layout and adjusting the position of elements.

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