element/examples/docs/en-US/collapse.md

Collapse

Use Collapse to store contents.

Basic usage

You can expand multiple panels

:::demo

<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.

<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

<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	—	—