What attributes does position have?

The position attribute values ​​include static, relative, absolute, fixed, sticky, etc. Detailed introduction: 1. static is the default value of the position attribute, which means that the elements are laid out according to the normal document flow without special positioning. The position of the elements is determined by their order in the HTML document and cannot be passed through top, right, and bottom. Adjust with the left attribute; 2. relative is relative positioning and so on.

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

In front-end development, position is an important attribute in CSS, which is used to control the positioning of elements. The position attribute has the following commonly used values:

1. static (default value):

static is the default value of the position attribute, which means that the element is laid out according to the normal document flow. Make special positioning. The position of an element is determined by its order in the HTML document and cannot be adjusted through the top, right, bottom, and left attributes.

   .element {
     position: static;
   }

2. relative:

Relative relative positioning means that the element is positioned relative to its normal position. By setting the top, right, bottom, and left properties, you can fine-tune the position of the element in the document flow. Relative positioning does not affect the layout of other elements.

   .element {
     position: relative;
     top: 10px;
     left: 20px;
   }

3. absolute:

Absolute absolute positioning means that the element is positioned relative to its nearest positioned parent element (the position attribute value is not static). If there is no positioned parent element, positioning is relative to the document's initial containing block. By setting the top, right, bottom, and left attributes, you can precisely control the position of the element.

   .element {
     position: absolute;
     top: 50px;
     left: 100px;
   }

4. fixed:

Fixed fixed positioning means that the element is positioned relative to the browser window and always remains at a fixed position in the window and will not change position with scrolling. By setting the top, right, bottom, and left properties, you can determine the position of the element in the window.

   .element {
     position: fixed;
     top: 0;
     right: 0;
   }

5. sticky:

Sticky sticky positioning means that the element is positioned according to changes in the scroll position. When an element is visible within a container, its position is relative to the container, and when the element scrolls out of the container, it is anchored to the container's boundaries. You can control the sticky positioning of elements by setting the top, right, bottom, and left attributes.

   .element {
     position: sticky;
     top: 20px;
   }

In addition to the above commonly used position attribute values, there are also some less commonly used values, such as:

- inherit: inherit the position attribute value of the parent element.

- initial: Resets the position property to the default value static.

- unset: Resets the position attribute to the default value and inherits the position attribute value of the parent element.

It should be noted that the value of the position attribute will affect the stacking order (z-index) of the elements. Different positioning methods have different stacking order rules.

In summary, the position attribute is used to control the positioning method of elements. Commonly used values ​​​​are static, relative, absolute, fixed and sticky. The position of the element can be adjusted by setting the top, right, bottom and left attributes. Understanding and flexibly using the position attribute can help us achieve more precise layout effects.

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