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---
title: margin-trim
slug: Web/CSS/margin-trim
page-type: css-property
status:
- experimental
browser-compat: css.properties.margin-trim
---
{{CSSRef}}{{SeeCompatTable}}
The `margin-trim` property allows the container to trim the margins of its children where they adjoin the container's edges.
## Syntax
```css
margin-trim: none;
margin-trim: block;
margin-trim: block-start;
margin-trim: block-end;
margin-trim: inline;
margin-trim: inline-start;
margin-trim: inline-end;
/* Global values */
margin-trim: inherit;
margin-trim: initial;
margin-trim: revert;
margin-trim: revert-layer;
margin-trim: unset;
```
### Values
- `none`
- : Margins are not trimmed by the container.
- `block`
- : Margins provided to the block children where they adjoin the container's edges are trimmed to zero without affecting the margins provided to the container.
- `block-start`
- : Margin of the first block child with the container's edge is trimmed to zero.
- `block-end`
- : Margin of last block child with the container's edge is trimmed to zero.
- `inline`
- : Margins provided to the inline children where they adjoin the container's edges are trimmed to zero, without affecting the spacing at the beginning and end of the row.
- `inline-start`
- : Margin between the container's edge and the first inline child is trimmed to zero.
- `inline-end`
- : Margin between the container's edge and the last inline child is trimmed to zero.
## Formal definition
{{cssinfo}}
## Formal syntax
{{csssyntax}}
## Examples
### Basic usage
Once support is implemented for this property, it will probably work like so:
When you've got a container with some inline children and you want to put a margin between each child but not have it interfere with the spacing at the end of the row, you might do something like this:
```css
article {
background-color: red;
margin: 20px;
padding: 20px;
display: inline-block;
}
article > span {
background-color: black;
color: white;
text-align: center;
padding: 10px;
margin-right: 20px;
margin-left: 30px;
}
```
The problem here is that you'd end up with 20px too much spacing at the right of the row, so you'd maybe do this to fix it:
```css
span:last-child {
margin-right: 0;
margin-left: 0;
}
```
It is a pain having to write another rule to achieve this, and it is also not very flexible. Instead, `margin-trim` could fix it:
```css
article {
margin-trim: inline-end;
/* … */
}
```
Similarly, to remove left margin with the container's edge:
```css
article {
margin-trim: inline-start;
/* … */
}
```
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- {{CSSxRef("margin")}}