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Supported Regions:上海

Cascading Select

WdCascade

Applicable Scenarios​

Multi-level selector, commonly used in region selection, model configuration selection, and more.

Image fe55a30ef14ae089ab39815049874084

Basic Capabilities​

Supports manual configuration of option lists, entering values and names

Image a6a0fb925d854cb2df6318c65e4de593

Selected Value Property​

  1. The selected value property represents the component's default form value, which can be bound to variables or expressions to implement dynamic changes to the selected value.Image 12ced3c388adf5d92a44b3ec2367d4c8
  2. The selected value must be filled with the corresponding option value; entering option names is invalid.

Practices for Other Scenarios​

Refer to the Form Scenario Practice Guide to explore various supported scenarios and implementation solutions for forms.

Example​

Interactive Preview​

Component Input Status​

Style API Example​

#wd-page-root .wd-form-item .wd-select-select {
  border-color: cyan;
  background-color: black;
  border-width: 2px;
  border-radius: 6px;
  color: cyan;
}

Properties​

External properties received by the component

Property Name
Property Identifier
Type
Description
Display HeadlineslabelVisibleboolean

Default value: true

Title alignmentlabelAlignstring

In the scenario, the form by default follows the title alignment configuration of the form container.

Line break in headinglabelWrapboolean

If the title content is too long when closed, show one line with overflow omitted; when enabled, show with line breaks. In form scenarios, it follows the form container's title line break configuration by default.

Title positionlayoutstring

Set title display position in form component. In the scenario, it follows the title position configuration of the form container by default.

Title widthlabelWidthstring

You can enter a value with units such as px or %, for example: 200px.

In the scenario, the form follows the title width configuration of the form container by default.

Heading NotelabelTipsstring

Take effect on PC/H5

Configure tooltip content for the heading

Display clear buttonclearableboolean

Enabled, quick clear button is provided by

Default value: true

Prefix textbeforestring

The input box in the form displays the prefix text. In the form submission scenario, the prefix text is submitted as part of the form content to the data model.

suffix textafterstring

The input box in the form displays suffix text. In the scenario of form submission, the suffix text is submitted as form content to the data model together.

Prefix icon typeprefixTypestring

Select icon type

Example: ""

Prefix iconprefixIconstring

Show icon before the form input box

Example: "success"

Prefix iconprefixSrcstring

Set custom icon address

suffix icon typesuffixTypestring

Select icon type

Example: "fixed"

suffix iconsuffixIconstring

Show icon in the form input box

Example: "success"

suffix iconsuffixSrcstring

Set custom icon address

Prompt.extrastring

The prompt content is displayed below the input box after configuration.

Display underscore on mobile terminalborderedH5boolean

After closing, the mobile terminal does not show the bottom underline

Default value: true

Display input border on PCborderedPcboolean

After closing, do not display input border on PC

Default value: true

Status.statusstring

Example: "edit"

Requiredrequiredboolean
Required identifierrequiredFlagboolean

Enabled, the component will display a required asterisk tag if mandatory.

Default value: true

Required validation noterequiredMsgstring

Example: "该项为必填项"

Bound fieldnamestring

The Key value of a form field is used to match the field identifier of the data model when submitting data. It must be unique within the form.

item datadataarray

item data

Example: [ { "label": "北京市", "value": "bj", "children": [ { "label": "朝阳区", "value": "cy" }, { "label": "海淀区", "value": "hd" } ] }, { "label": "上海市", "value": "sh", "children": [ { "label": "徐汇区", "value": "xh" }, { "label": "黄埔区", "value": "hp" } ] }, { "label": "广东省", "value": "gd", "children": [ { "label": "深圳市", "value": "sz", "children": [ { "label": "南山区", "value": "ns" }, { "label": "宝安区", "value": "ba" }, { "label": "福田区", "value": "ft", "disabled": true } ] }, { "label": "广州市", "value": "gz", "children": [ { "label": "天河区", "value": "th" }, { "label": "越秀区", "value": "yx" }, { "label": "海珠区", "value": "hz" } ] }, { "label": "东莞市", "value": "dg" } ] } ]

Title content.labelstring

Example: "级联选择"

selected valuevaluearray

Default selected option

Default value: []

Placeholder textplaceholderstring

Example: "请选择"

PC component dimensionsizestring

Size configuration is only applicable to PC and takes effect by default in form container scenarios.

Events​

Events exposed by the component. You can listen to component events to trigger external actions

Event Name
Event Code
Event Output Parameters event.detail
Applicable Scenarios
Description
value changechangeobject
  • value: string

    输入值
Compatible with all platforms

Trigger when a user modifies a component value

Properties API​

Through the Property API, you can access the internal state and property values of components. You can access internal values using$w.componentId.propertyName, such as $w.input1.value. For details, please refer to Property API

Read-only Property Name
Property Identifier
Type
Description
Bound fieldnamestring

The Key value of a form field is used to match the field identifier of the data model when submitting data. It must be unique within the form.

Title content.labelstring
selected valuevaluearray

Default selected option

Requiredrequiredboolean
Indicates whether to displayvisibleboolean

Whether to display the component

Whether to disabledisabledboolean

Component Disabled

Specify whether it is read-only or not.readOnlyboolean

Whether the component is read-only

selected itemselectedOptionsarray

selected item object

Method API​

Through the Method API, you can programmatically trigger internal methods of components, such as submitting forms, displaying popups, etc. You can call component methods using $w.componentId.methodName, such as $w.form1.submit()

Method Name
Method Identifier
Parameters
Method Description
set valuesetValueobject
  • value: array值
    • string

通过 $w.cascader1.setValue(['bj','cy']) 设置组件值

Show/Hide SettingssetVisibleboolean显示

Set the component to hidden via $w.id1.setVisible(false)

Set DisabledsetDisabledboolean禁用

Set the component to disabled with $w.id1.setDisabled(true)

Clear valueclearValue

Clear the component value with $w.id1.clearValue()

Set as read-onlysetReadOnlyboolean只读

Set the component to read-only via $w.id1.setReadOnly(true)

Trigger validationhandleValidate

Validate the component value via $w.id1.handleValidate()

Clear verificationclearValidate

Clear component validation via $w.id1.clearValidate()

Style API​

Through the Style API, you can override the styles of internal elements in components to achieve customization. For example, in the low-code editor, you can write styles for all button components using #wd-page-root .wd-btn, and control individual component styles with :scope. For detailed instructions, please refer toStyle API

Name
Class Name
Description and Examples
root element.wd-cascader-rootOutermost component element
/* :scope refers to the current component element */
/* For details, refer to the Style API documentation */
:scope.wd-cascader-root {
  /* Write CSS styles here */
}
H5 root element.wd-h5-cascader-rootSettable root element style for the H5 side
/* :scope refers to the current component element */
/* For details, refer to the Style API documentation */
:scope.wd-h5-cascader-root {
  /* Write CSS styles here */
}
PC-side root element.wd-pc-cascader-rootSettable root element style for the PC side
/* :scope refers to the current component element */
/* For details, refer to the Style API documentation */
:scope.wd-pc-cascader-root {
  /* Write CSS styles here */
}
Mini program root element.wd-mp-cascader-rootSettable root element style for mini program
/* :scope refers to the current component element */
/* For details, refer to the Style API documentation */
:scope.wd-mp-cascader-root {
  /* Write CSS styles here */
}
Component title style.wd-cascader-root .wd-form-item-wrap__labelComponent title element

:scope .wd-form-item-wrap__label {
  font-size: 20px;
  color: gray;
  padding: 0;
  display: flex;
  align-items: center;
}
编辑态-选择框样式.wd-cascader-root .wd-form-input-wrapComponent border, margin style, background color, font size, font color

:scope .wd-form-input-wrap {
  font-size: 20px;
  color: gray;
  text-align: right;
  height: 40px;
  width: 100%;
  background-color: lightgray;
  border-width: 2px;
  border-color: gray;
  border-radius: 0px;
}
编辑态-选择框样式（获取焦点）.wd-cascader-root .wd-form-input-wrap.is-focused编辑态-选择框样式（获取焦点）

:scope .wd-form-input-wrap.is-focused {
  background-color: lightgray;
  border-color: gray;
}
Editing status - Placeholder text style.wd-cascader-root .wd-cascader__input .wd-input::placeholderSet placeholder text style

    :scope .wd-cascader__input .wd-input::placeholder{
      color: lightgray !important;
    }
Editing status - Verification information.wd-cascader-root .wd-g-text-errorSet component verification information style

:scope .wd-g-text-error {
    font-size: 20px;
    color: gray;
  }
prompt text.wd-cascader-root .wd-form-item__help-textSet the text style of the component prompt

:scope .wd-form-item__help-text {
    font-size: 20px;
    color: gray;
  }
禁用态-选择框样式.wd-cascader-root .wd-form-input-wrap.is-disabledComponent disabled style

:scope .wd-form-input-wrap.is-disabled {
    font-size: 20px;
    color: gray;
    text-align: right;
    height: 40px;
    width: 200px;
    background-color: lightgray;
    border-width: 2px;
    border-color: gray;
    border-radius: 10px;
  }
read-only status - form value style.wd-cascader-root .wd-form-item__readonly-valueSet component read-only status

:scope .wd-form-item__readonly-value {
    font-size: 20px;
    color: gray;
  }
Prefix text style.wd-cascader-root .wd-form-input-group__addon-leftSet component prefix text style

:scope .wd-form-input-group__addon-left {
    font-size: 20px;
    color: gray;
    height: 40px;
    background-color: lightgray;
  }
/* 仅PC端生效 */
:scope.wd-pc-cascader-root .wd-form-input-group__addon-left {
    border-width: 2px;
    border-color: gray;
    border-radius: 10px 0 0 10px;
}
Suffix text style.wd-cascader-root .wd-form-input-group__addon-rightSet component suffix text style

:scope .wd-form-input-group__addon-right {
    font-size: 20px;
    color: gray;
    height: 40px;
    background-color: lightgray;
  }
/* 仅PC端生效 */
:scope.wd-pc-cascader-root .wd-form-input-group__addon-right {
    border-width: 2px;
    border-color: gray;
    border-radius: 10px 0 0 10px;
}

Learn about Style API