element-ui/examples/docs/en-US/collapse.md
2021-06-07 11:56:04 +08:00

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Markdown

## Collapse
Use Collapse to store contents.
### Basic usage
You can expand multiple panels
:::demo
```html
<el-collapse v-model="activeNames" @change="handleChange">
<el-collapse-item title="Consistency" name="1">
<div>Consistent with real life: in line with the process and logic of real life, and comply with languages and habits that the users are used to;</div>
<div>Consistent within interface: all elements should be consistent, such as: design style, icons and texts, position of elements, etc.</div>
</el-collapse-item>
<el-collapse-item title="Feedback" name="2">
<div>Operation feedback: enable the users to clearly perceive their operations by style updates and interactive effects;</div>
<div>Visual feedback: reflect current state by updating or rearranging elements of the page.</div>
</el-collapse-item>
<el-collapse-item title="Efficiency" name="3">
<div>Simplify the process: keep operating process simple and intuitive;</div>
<div>Definite and clear: enunciate your intentions clearly so that the users can quickly understand and make decisions;</div>
<div>Easy to identify: the interface should be straightforward, which helps the users to identify and frees them from memorizing and recalling.</div>
</el-collapse-item>
<el-collapse-item title="Controllability" name="4">
<div>Decision making: giving advices about operations is acceptable, but do not make decisions for the users;</div>
<div>Controlled consequences: users should be granted the freedom to operate, including canceling, aborting or terminating current operation.</div>
</el-collapse-item>
</el-collapse>
<script>
export default {
data() {
return {
activeNames: ['1']
};
},
methods: {
handleChange(val) {
console.log(val);
}
}
}
</script>
```
:::
### Accordion
In accordion mode, only one panel can be expanded at once
:::demo Activate accordion mode using the `accordion` attribute.
```html
<el-collapse v-model="activeName" accordion>
<el-collapse-item title="Consistency" name="1">
<div>Consistent with real life: in line with the process and logic of real life, and comply with languages and habits that the users are used to;</div>
<div>Consistent within interface: all elements should be consistent, such as: design style, icons and texts, position of elements, etc.</div>
</el-collapse-item>
<el-collapse-item title="Feedback" name="2">
<div>Operation feedback: enable the users to clearly perceive their operations by style updates and interactive effects;</div>
<div>Visual feedback: reflect current state by updating or rearranging elements of the page.</div>
</el-collapse-item>
<el-collapse-item title="Efficiency" name="3">
<div>Simplify the process: keep operating process simple and intuitive;</div>
<div>Definite and clear: enunciate your intentions clearly so that the users can quickly understand and make decisions;</div>
<div>Easy to identify: the interface should be straightforward, which helps the users to identify and frees them from memorizing and recalling.</div>
</el-collapse-item>
<el-collapse-item title="Controllability" name="4">
<div>Decision making: giving advices about operations is acceptable, but do not make decisions for the users;</div>
<div>Controlled consequences: users should be granted the freedom to operate, including canceling, aborting or terminating current operation.</div>
</el-collapse-item>
</el-collapse>
<script>
export default {
data() {
return {
activeName: '1'
};
}
}
</script>
```
:::
### Custom title
Besides using the `title` attribute, you can customize panel title with named slots, which makes adding custom content, e.g. icons, possible.
:::demo
```html
<el-collapse accordion>
<el-collapse-item name="1">
<template slot="title">
Consistency<i class="header-icon el-icon-info"></i>
</template>
<div>Consistent with real life: in line with the process and logic of real life, and comply with languages and habits that the users are used to;</div>
<div>Consistent within interface: all elements should be consistent, such as: design style, icons and texts, position of elements, etc.</div>
</el-collapse-item>
<el-collapse-item title="Feedback" name="2">
<div>Operation feedback: enable the users to clearly perceive their operations by style updates and interactive effects;</div>
<div>Visual feedback: reflect current state by updating or rearranging elements of the page.</div>
</el-collapse-item>
<el-collapse-item title="Efficiency" name="3">
<div>Simplify the process: keep operating process simple and intuitive;</div>
<div>Definite and clear: enunciate your intentions clearly so that the users can quickly understand and make decisions;</div>
<div>Easy to identify: the interface should be straightforward, which helps the users to identify and frees them from memorizing and recalling.</div>
</el-collapse-item>
<el-collapse-item title="Controllability" name="4">
<div>Decision making: giving advices about operations is acceptable, but do not make decisions for the users;</div>
<div>Controlled consequences: users should be granted the freedom to operate, including canceling, aborting or terminating current operation.</div>
</el-collapse-item>
</el-collapse>
```
:::
### Collapse Attributes
| Attribute | Description | Type | Accepted Values | Default |
|---------- |-------------- |---------- |-------------------------------- |-------- |
| value / v-model | currently active panel | string (accordion mode) / array (non-accordion mode) | — | — |
| accordion | whether to activate accordion mode | boolean | — | false |
### Collapse Events
| Event Name | Description | Parameters |
|---------|---------|---------|
| change | triggers when active panels change | (activeNames: array (non-accordion mode) / string (accordion mode)) |
### Collapse Item Attributes
| Attribute | Description | Type | Accepted Values | Default |
|---------- |-------------- |---------- |-------------------------------- |-------- |
| name | unique identification of the panel | string/number | — | — |
| title | title of the panel | string | — | — |
| disabled | disable the collapse item | boolean | — | — |