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69 lines
2.0 KiB
Markdown
69 lines
2.0 KiB
Markdown
---
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title: Affix
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lang: en-US
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---
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# Affix
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Fix the element to a specific visible area.
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## Basic Usage
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Affix is fixed at the top of the page by default.
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:::demo You can set `offset` attribute to change the offset top，the default value is 0。
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affix/basic
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:::
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## Target Container
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You can set `target` attribute to keep the affix in the container at all times. It will be hidden if out of range.
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:::demo Please notice that the container avoid having scrollbar.
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affix/target
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:::
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## Fixed Position
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The affix component provides two fixed positions: `top` and `bottom`.
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:::demo You can set `position` attribute to change the fixed position, the default value is `top`.
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affix/fixed
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:::
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## Affix API
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### Affix Attributes
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| Name | Description | Type | Default | Required |
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| ---------- | -------------------------------- | ------------------- | ------- | -------- |
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| `offset` | offset distance. | `number` | `0` | No |
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| `position` | position of affix. | `'top' \| 'bottom'` | `'top'` | No |
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| `target` | target container. (CSS selector) | `string` | — | No |
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| `z-index` | `z-index` of affix | `number` | `100` | No |
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### Affix Events
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| Name | Description | Type |
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| -------- | ---------------------------------- | -------------------------------------------------------- |
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| `change` | triggers when fixed state changed. | `(fixed: boolean) => void` |
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| `scroll` | triggers when scrolling. | `(value: { scrollTop: number, fixed: boolean }) => void` |
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### Affix Exposes
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| Method | Description | Type |
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| -------- | --------------------------- | ------------ |
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| `update` | update affix state manually | `() => void` |
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### Affix Slots
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| Name | Description |
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| --------- | -------------------------- |
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| `default` | customize default content. |
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