vant/src/cascader

Cascader

Install

import Vue from 'vue';
import { Cascader } from 'vant';

Vue.use(Cascader);

Usage

Basic Usage

<van-field
  v-model="fieldValue"
  is-link
  readonly
  label="Area"
  placeholder="Select Area"
  @click="show = true"
/>
<van-popup v-model="show" round position="bottom">
  <van-cascader
    v-model="cascaderValue"
    title="Select Area"
    :options="options"
    @close="show = false"
    @finish="onFinish"
  />
</van-popup>

export default {
  data() {
    return {
      show: false,
      fieldValue: '',
      cascaderValue: '',
      options: [
        {
          text: 'Zhejiang',
          value: '330000',
          children: [{ text: 'Hangzhou', value: '330100' }],
        },
        {
          text: 'Jiangsu',
          value: '320000',
          children: [{ text: 'Nanjing', value: '320100' }],
        },
      ],
    };
  },
  methods: {
    onFinish({ selectedOptions }) {
      this.show = false;
      this.fieldValue = selectedOptions.map((option) => option.text).join('/');
    },
  },
};

Custom Color

<van-cascader
  v-model="cascaderValue"
  title="Select Area"
  :options="options"
  active-color="#1989fa"
  @close="show = false"
  @finish="onFinish"
/>

Async Options

<van-field
  v-model="fieldValue"
  is-link
  readonly
  label="Area"
  placeholder="Select Area"
  @click="show = true"
/>
<van-popup v-model="show" round position="bottom">
  <van-cascader
    v-model="cascaderValue"
    title="Select Area"
    :options="options"
    @close="show = false"
    @change="onChange"
    @finish="onFinish"
  />
</van-popup>

export default {
  data() {
    return {
      show: false,
      fieldValue: '',
      cascaderValue: '',
      options: [
        {
          text: 'Zhejiang',
          value: '330000',
          children: [],
        },
      ],
    };
  },
  methods: {
    onChange({ value }) {
      if (value === this.options[0].value) {
        setTimeout(() => {
          this.options[0].children = [
            { text: 'Hangzhou', value: '330100' },
            { text: 'Ningbo', value: '330200' },
          ];
        }, 500);
      }
    },
    onFinish({ selectedOptions }) {
      this.show = false;
      this.fieldValue = selectedOptions.map((option) => option.text).join('/');
    },
  },
};

Custom Field Names

<van-cascader
  v-model="cascaderValue"
  title="Select Area"
  :options="options"
  :field-names="fieldNames"
/>

export default {
  data() {
    return {
      cascaderValue: '',
      fieldNames: {
        text: 'name',
        value: 'code',
        children: 'items',
      },
      options: [
        {
          name: 'Zhejiang',
          code: '330000',
          items: [{ name: 'Hangzhou', code: '330100' }],
        },
        {
          name: 'Jiangsu',
          code: '320000',
          items: [{ name: 'Nanjing', code: '320100' }],
        },
      ],
    };
  },
};

API

Props

Attribute	Description	Type	Default
title	Title	string	-
value	Value of selected option	string | number	-
options	Options	Option[]	[]
placeholder	Placeholder of unselected tab	string	Select
active-color	Active color	string	#ee0a24
closeable	Whether to show close icon	boolean	true
field-names v2.12.4	Custom the fields of options	object	{ text: 'text', value: 'value', children: 'children' }

Events

Event	Description	Arguments
change	Emitted when active option changed	{ value, selectedOptions, tabIndex }
finish	Emitted when all options is selected	{ value, selectedOptions, tabIndex }
close	Emmitted when the close icon is clicked	-

Slots

Name	Description
title	Custom title

Less Variables

How to use: Custom Theme.

Name	Default Value	Description
@cascader-header-height	48px	-
@cascader-title-font-size	@font-size-lg	-
@cascader-title-line-height	20px	-
@cascader-close-icon-size	22px	-
@cascader-close-icon-color	@gray-5	-
@cascader-close-icon-active-color	@gray-6	-
@cascader-selected-icon-size	18px	-
@cascader-tabs-height	48px	-
@cascader-active-color	@red	-
@cascader-options-height	384px	-
@cascader-tab-color	@text-color	-
@cascader-unselected-tab-color	@gray-6	-