# inset-block-end

> Applies `inset-block-end` — the trailing block edge, the bottom edge in a horizontal writing mode.

```ts
import { insBe } from "@sdxc/u/layout";
```

Applies `inset-block-end` — the trailing block edge, the bottom edge in a
horizontal writing mode.

## Quick reference

Every documented call, beside the CSS it emits.

| Call | CSS |
| --- | --- |
| `u.insBe(4)` | `css({ insetBlockEnd: "calc(var(--ui-spacing, 0.25rem) * 4)" })` |

## Examples

### Basic example

Use `insBe(n)` to set the `inset-block-end` offset of a positioned element from the spacing scale, the bottom edge in horizontal text:

```tsx
<div mix={[...]}>
	<div mix={[relative(), is(48), bs(32), ...]}>
		<div mix={[absolute(), insBe(0), ...]}>insBe(0)</div>
	</div>
	<div mix={[relative(), is(48), bs(32), ...]}>
		<div mix={[absolute(), insBe(6), ...]}>insBe(6)</div>
	</div>
</div>
```

### Pinning to a corner

Combine `insBe()` with `insIe()` to pin an element into the end corner of its container, like a toast:

```tsx
<div mix={[relative(), is(72), bs(40), ...]}>
	<div mix={[absolute(), insBe(4), insIe(4), ...]}>Changes saved</div>
</div>
```

## Using a custom value

Every scale argument also takes a raw CSS value, which passes through untouched.

```ts
u.insBe("2.75rem")
```

## Applying on a state

Wrap the call in a state utility to scope it to one selector.

```ts
u.hover(u.insBe(4))
```

## Responsive design

Wrap the call in a container query to scope it to one width.

```ts
u.at("md", u.insBe(4))
```

## Customizing your theme

### Customizing spacing

Every numeric step multiplies `--ui-spacing`, so redefining it rescales every spacing and sizing utility at once:

```css
:root {
	--ui-spacing: 0.25rem;
}
```

Every call that names the step now reads the new value:

```ts
insBe(4)
```

## Signature

```ts
u.insBe(value: SpacingValue)
```