To adjust the display order of web page elements without changing the HTML structure, it can be implemented using CSS. 1. Use the order attribute of flexbox, set display: flex for the parent container, and set different order values for child elements to control the order. For example, .item1{order:2} and .item2{order:1} will make .item2 appear before .item1, but will not affect the DOM structure and keyboard navigation order. 2. Use grid layout positioning, specify the position of elements in the grid through grid-column and grid-row, which is suitable for fixed layout scenarios. 3. Adjustment through float or position, but it is easy to cause confusion in publishing layout, and the cost of responsive design and maintenance is high. Modern usage is not recommended. Each method is suitable for different scenarios, and you need to pay attention to accessibility and responsive performance when using it.
Sometimes, you want to adjust the display order of elements in the web page, but you don’t want to change the HTML structure. At this time, you can use CSS to implement it. While HTML determines the structural order of content, CSS also provides ways to rearrange elements visually.

The following methods are more practical and suitable for different scenarios:
Use order
property of flexbox
This is the most common and flexible way, especially when making responsive layouts.

- Set
display: flex;
- Then set the
order
value for the child element, the smaller the value, the higher the default is 0
For example:
.container { display: flex; } .item1 { order: 2; } .item2 { order: 1; }
In this way, .item2
will be displayed in front of .item1
. You can adjust order
value of each element as needed to control the order.

Note:
order
only affects the visual order, not the DOM structure and keyboard navigation order, so it may have an impact on accessibility, so be careful when using it.
Use grid
layout to locate
If you use CSS Grid layout, you can also control the position of the element through grid lines.
for example:
.container { display: grid; } .item1 { grid-column: 2; } .item2 { grid-column: 1; }
In this way .item1
will appear to the right of .item2
. You can also use grid-row
to control the position of the row.
This method is suitable for scenarios with relatively fixed layout structures, especially for situations where precise position control is required.
Adjustment via float
or position
(modern usage is not recommended)
The old method is to use float
or position: absolute;
to adjust the position, but these methods can easily cause layout confusion, especially the maintenance cost under responsive design. Unless you have special needs, it is recommended to prioritize Flexbox or Grid.
Basically these commonly used methods. Each method has applicable scenarios. Flexbox's order
is the most flexible, Grid is more suitable for complex layouts, while others are more suitable for specific old projects. Pay attention to accessibility and responsive performance when using it, and don't just look at the visual effects.
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