When using CSS Grid layout, the easiest and most effective way is to use the gap attribute to add spacing between grid items. Gap is an abbreviation property for setting row-gap and column-gap at the same time. For example, .grid-container { display: grid; gap: 20px; } can set a 20px spacing for all adjacent grid items; if you need to set it separately, you can use gap: 10px 20px;. Notes include: 1. The parent container must be set to grid layout; 2. The gap does not affect margins; 3. Good compatibility but old browsers may need to be prefixed. Common problems and solutions are: 1. If the container is not correctly set to grid layout, display: grid should be checked; 2. If the grid item has negative margins that affect the gap, you can use the developer tools to check the spacing; 3. If the fixed size causes the gap to be less obvious, you can try to increase the gap value to test the effect.
When using CSS Grid layout, the easiest and most effective way to add spacing between grid items is to use gap
attribute. It allows you to easily control the gap between rows and columns without the need to set margin or padding.

What is gap
attribute?
gap
is an abbreviation property in CSS Grid, which is used to set row-gap
and column-gap
gap at the same time.
You can use it like this:

.grid-container { display: grid; gap: 20px; }
In the example above, all adjacent grid items will maintain a 20px spacing, whether horizontally or vertically. If you only want to set the spacing between rows and columns separately, you can also write it like this:
gap: 10px 20px; /* row-gap column-gap */
Things to note when using gap
Although gap
is simple and easy to use, there are several details to pay attention to:

- The parent container must be grid layout :
gap
will only take effect when the element hasdisplay: grid
set. - Will not affect margins :
gap
only controls the spacing between grid items and does not create additional white space at the edge of the container. - Good compatibility : Modern browsers basically support
gap
, but in some older versions-ms-grid-row-gap
and-ms-grid-column-gap
may be required.
Frequently Asked Questions in Practical Applications
Sometimes you will find that you have set up gap
but you don’t see any effect. This may be caused by the following situations:
- The container is not correctly set to grid layout
- The grid term itself has a negative margin offsets the gap
- Fixed sizes of
grid-template-columns
orgrid-template-rows
are used, resulting in visual inconspicuousness.
The solution is very simple:
- Check if
display: grid
is written - Check the position and spacing of each grid item with browser developer tools
- Try setting a larger gap value to test whether it takes effect
Let's summarize
It is very convenient to use gap
to add spacing to grid, and it only takes one line of code to do it. Remember that it only acts between grid items and does not affect the external boundaries of the overall layout. If you encounter an invalid situation, first confirm whether the container has really become a grid layout. Basically that's it.
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