QuestionDropdownModel

Specifies whether to display a button that clears the selected value.

Type:

boolean readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Default value:

True

Implemented in:

QuestionDropdownModel

Specifies whether users can add their own choices if the desired option isn't available in the dropdown.

Default value: false

View Demo

Custom choices will only be stored temporarily for the duration of the current browser session. If you want to save them in a database or another data storage, handle the onCreateCustomChoiceItem event.

Type:

boolean readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Implemented in:

QuestionDropdownModel

Enables lazy loading. If you set this property to true, you should implement the Survey's onChoicesLazyLoad event handler.

Type:

boolean readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Implemented in:

QuestionDropdownModel

See also:

choicesLazyLoadPageSize * , SurveyModel.onChoicesLazyLoad

Specifies the number of choice items to load at a time when choices are loaded on demand.

Default value: 25

This property does not accept values below 25 to prevent the server from being flooded with requests.

Type:

number readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Default value:

25

Implemented in:

QuestionDropdownModel

See also:

choicesLazyLoadEnabled * , SurveyModel.onChoicesLazyLoad

Use the choicesMin, choicesMax, and choicesStep properties to generate choice items automatically. For example, the configuration below generates three choice items: [10, 20, 30].

"choicesMin": 10,
"choicesMax": 30
"choicesStep": 10

Type:

number readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Implemented in:

QuestionDropdownModel

See also:

choicesMin * , choicesStep

Use the choicesMin, choicesMax, and choicesStep properties to generate choice items automatically. For example, the configuration below generates three choice items: [10, 20, 30].

"choicesMin": 10,
"choicesMax": 30
"choicesStep": 10

Type:

number readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Implemented in:

QuestionDropdownModel

See also:

choicesMax * , choicesStep

Use the choicesMin, choicesMax, and choicesStep properties to generate choice items automatically. For example, the configuration below generates three choice items: [10, 20, 30].

"choicesMin": 10,
"choicesMax": 30
"choicesStep": 10

The default value of the choicesStep property is 1.

Type:

number readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Default value:

1

Implemented in:

QuestionDropdownModel

See also:

choicesMin * , choicesMax

A placeholder for the input field.

Type:

string writable

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Implemented in:

QuestionDropdownModel

Specifies whether users can enter a value into the input field to filter the drop-down list.

View Demo

Type:

boolean readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Default value:

True

Implemented in:

QuestionDropdownModel

See also:

searchMode * , SurveyModel.onChoicesSearch

Specifies a comparison operation used to filter the drop-down list. Applies only if searchEnabled is true.

Possible values:

• "contains" (default)
• "startsWith"

Type:

"contains" | "startsWith" readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Default value:

contains

Accepted values:

contains , startsWith

Implemented in:

QuestionDropdownModel

See also:

SurveyModel.onChoicesSearch

Returns the selected choice item. If no item is selected, returns null.

Type:

ChoiceItem readonly

Implemented in:

QuestionDropdownModel

Specifies whether to wrap long texts in choice options onto a new line.

Default value: true

Disable this property if you want the texts to be truncated with ellipsis.

Type:

boolean readonly

This property is stored in the survey JSON definition and can be edited in the Survey Creator.

Default value:

True

Implemented in:

QuestionDropdownModel