mirror of
https://gitee.com/element-plus/element-plus.git
synced 2024-12-07 13:47:45 +08:00
120 lines
9.9 KiB
Markdown
120 lines
9.9 KiB
Markdown
---
|
|
title: Image
|
|
lang: en-US
|
|
---
|
|
|
|
# Image
|
|
|
|
Besides the native features of img, support lazy load, custom placeholder and load failure, etc.
|
|
|
|
## Basic Usage
|
|
|
|
:::demo Indicate how the image should be resized to fit its container by `fit`, same as native [object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit).
|
|
|
|
image/basic-usage
|
|
|
|
:::
|
|
|
|
## Placeholder
|
|
|
|
:::demo Custom placeholder content when image hasn't loaded yet by `slot = placeholder`
|
|
|
|
image/placeholder
|
|
|
|
:::
|
|
|
|
## Load Failed
|
|
|
|
:::demo Custom failed content when error occurs to image load by `slot = error`
|
|
|
|
image/load-failed
|
|
|
|
:::
|
|
|
|
## Lazy Load
|
|
|
|
:::tip
|
|
|
|
Native `loading` has been supported since <VersionTag version="2.2.3" />, you can use `loading = "lazy"` to replace `lazy = true`.
|
|
|
|
If the current browser supports native lazy loading, the native lazy loading will be used first, otherwise will be implemented through scroll.
|
|
|
|
:::
|
|
|
|
:::demo Use lazy load by `lazy = true`. Image will load until scroll into view when set. You can indicate scroll container that adds scroll listener to by `scroll-container`. If undefined, will be the nearest parent container whose overflow property is auto or scroll.
|
|
|
|
image/lazy-load
|
|
|
|
:::
|
|
|
|
## Image Preview
|
|
|
|
:::demo allow big image preview by setting `previewSrcList` prop. You can initialize the position of the first picture previewed by `initial-index`. The default initial position is 0.
|
|
|
|
image/image-preview
|
|
|
|
:::
|
|
|
|
## Image API
|
|
|
|
### Image Attributes
|
|
|
|
| Name | Description | Type | Default |
|
|
| ---------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------- | ----------------------------------------------------------------------- |
|
|
| `src` | image source, same as native. | `string` | — |
|
|
| `fit` | indicate how the image should be resized to fit its container, same as [object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit). | `'fill' \| 'contain' \| 'cover' \| 'none' \| 'scale-down'` | — |
|
|
| `hide-on-click-modal` | when enabling preview, use this flag to control whether clicking on backdrop can exit preview mode. | `boolean` | `false` |
|
|
| `loading` <VersionTag version="2.2.3" /> | Indicates how the browser should load the image, same as [native](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-loading) | `'eager' \| 'lazy'` | — |
|
|
| `lazy` | whether to use lazy load. | `boolean` | `false` |
|
|
| `scroll-container` | the container to add scroll listener when using lazy load. | `string \| HTMLElement` | the nearest parent container whose overflow property is auto or scroll. |
|
|
| `alt` | native attribute `alt`. | `string` | — |
|
|
| `referrer-policy` | native attribute `referrerPolicy`. | `string` | — |
|
|
| `preview-src-list` | allow big image preview. | `string[]` | — |
|
|
| `z-index` | set image preview z-index. | `number` | — |
|
|
| `initial-index` | initial preview image index, less than the length of `url-list`. | `number` | `0` |
|
|
| `close-on-press-escape` | whether the image-viewer can be closed by pressing ESC | `boolean` | `true` |
|
|
| `preview-teleported` | whether to append image-viewer to body. A nested parent element attribute transform should have this attribute set to `true`. | `boolean` | `false` |
|
|
|
|
### Image Events
|
|
|
|
| Name | Description | Type |
|
|
| -------- | ------------------------------------------------------------------------------------------------- | ------------------------- |
|
|
| `load` | same as native load. | `(e: Event) => void` |
|
|
| `error` | same as native error. | `(e: Error) => void` |
|
|
| `switch` | trigger when switching images. | `(index: number) => void` |
|
|
| `close` | trigger when clicking on close button or when `hide-on-click-modal` enabled clicking on backdrop. | `() => void` |
|
|
|
|
### Image Slots
|
|
|
|
| Name | Description |
|
|
| ------------- | -------------------------------------------------------- |
|
|
| `placeholder` | custom placeholder content when image hasn't loaded yet. |
|
|
| `error` | custom image load failed content. |
|
|
| `viewer` | description of the image. |
|
|
|
|
## Image Viewer API
|
|
|
|
### Image Viewer Attributes
|
|
|
|
| Name | Description | Type | Default |
|
|
| --------------------- | ----------------------------------------------------------------------------------------------------------------------------- | ------------------ | ------- |
|
|
| `url-list` | preview link list. | `string[]` | `[]` |
|
|
| `z-index` | preview backdrop z-index. | `number \| string` | — |
|
|
| `initial-index` | the initial preview image index, less than or equal to the length of `url-list`. | `number` | `0` |
|
|
| `infinite` | whether preview is infinite. | `boolean` | `true` |
|
|
| `hide-on-click-modal` | whether user can emit close event when clicking backdrop. | `boolean` | `false` |
|
|
| `teleported` | whether to append image itself to body. A nested parent element attribute transform should have this attribute set to `true`. | `boolean` | `false` |
|
|
|
|
### Image Viewer Events
|
|
|
|
| Name | Description | Type |
|
|
| -------- | ------------------------------------------------------------------------------------------------- | ------------------------- |
|
|
| `close` | trigger when clicking on close button or when `hide-on-click-modal` enabled clicking on backdrop. | `() => void` |
|
|
| `switch` | trigger when switching images. | `(index: number) => void` |
|
|
|
|
## Image Viewer Methods
|
|
|
|
| Method | Description | Parameters |
|
|
| ------------- | --------------------- | ----------------------------------------------------- |
|
|
| setActiveItem | manually switch image | index of the image to be switched to, starting from 0 |
|