Why does the front-end fixed positioning move?

The reasons why the front-end fixed positioning will move: 1. The positioning attribute of the parent element is affected. The solution is to ensure that the positioning attribute of the parent element is the default value, that is, do not set relative positioning or absolute positioning; 2. Other CSS Attribute influence, the solution is to check the CSS properties of fixed elements to ensure that they are not set to values ​​that cause animation effects; 3. The influence of JavaScript or dynamic content, check the JavaScript code or dynamic content in the page to find if there is anything related to fixed elements operations and so on.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Front-end fixed positioning (Fixed Positioning) is a CSS property that allows us to fix an element at a certain position in the browser window. The element will remain stationary no matter how the page is scrolled. However, sometimes we may encounter a situation where the fixed positioning of the front end moves. This may be caused by the following reasons:

1. The positioning attribute of the parent element: In When using fixed positioning, the positioning properties of the parent element may affect the performance of the fixed element. If the positioning attribute of the parent element is relative positioning (Relative Positioning) or absolute positioning (Absolute Positioning), then the fixed element will be positioned relative to the parent element, not relative to the browser window. This can cause fixed elements to move as the page scrolls.

Solution:

Ensure that the positioning attribute of the parent element is the default value, that is, no relative positioning or absolute positioning is set.

If you need to use relative or absolute positioning, you can set the positioning attribute of the parent element to fixed positioning to ensure that the fixed element is positioned relative to the browser window.

2. The impact of other CSS properties: Some CSS properties may affect the performance of fixed elements, such as transform, z-index, etc. These properties may cause fixed elements to animate as the page scrolls.

Solution:

Check the CSS properties of fixed elements, especially those that may affect positioning, to make sure they are not set to a value that would cause animation effects.

You can try to set these properties to their default values, or adjust their values ​​to eliminate the animation effect.

3. The impact of JavaScript or dynamic content: If JavaScript or dynamically generated content is used in the page, these content may cause fixed elements to have dynamic effects. For example, changing the position or style of a fixed element on a scroll event, or inserting dynamic content inside a fixed element.

Solution:

Check the JavaScript code or dynamic content in the page to find if there are any operations related to fixed elements.

Make sure these operations do not cause dynamic effects on fixed elements, or adjust the code logic if necessary.

To sum up, the problem of front-end fixed positioning moving is usually caused by the positioning attribute of the parent element, other CSS properties or JavaScript or dynamic content. By inspecting and adjusting the relevant code and styles, we can solve this problem. Hope these solutions help you!

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