element-plus/docs/en-US/component/affix.md

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# Affix
Fix the element to a specific visible area.
## Basic usage
Affix is fixed at the top of the page by default.
:::demo You can set `offset` attribute to change the offset topthe default value is 0。
affix/basic
:::
## Target container
You can set `target` attribute to keep the affix in the container at all times. It will be hidden if out of range.
:::demo Please notice that the container avoid having scrollbar.
affix/target
:::
## Fixed position
The affix component provides two fixed positions: `top` and `bottom`.
:::demo You can set `position` attribute to change the fixed position, the default value is `top`.
affix/fixed
:::
## Attributes
| Attribute | Description | Type | Accepted Values | Default |
| --------- | ------------------------------- | ------ | --------------- | ------- |
| offset | offset distance | number | — | 0 |
| position | position of affix | string | top / bottom | top |
| target | target container (CSS selector) | string | — | — |
| z-index | z-index of affix | number | — | 100 |
## Events
| Event Name | Description | Parameters |
| ---------- | --------------------------------- | -------------------------- |
| change | triggers when fixed state changed | (value: boolean) |
| scroll | triggers when scrolling | scroll top and fixed state |
## Methods
| Method | Description | Parameters |
| ------ | --------------------------- | ---------- |
| update | update affix state manually | — |
## Slots
| Name | Description |
| ---- | ------------------------- |
| — | customize default content |
<style lang="scss">
.example-showcase {
.affix-container {
text-align: center;
height: 400px;
border-radius: 4px;
background: var(--el-color-primary-light-9);
}
}
</style>