A value passed on to the autocomplete attribute of the underlying <input> element.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Empties the errors array.
Specifies when to clear the question value if the question becomes invisible.
Possible values:
"default" (default) - Inherits the setting from the Survey's clearInvisibleValues property."onHidden" - Clears the value when the question becomes invisible. If a question is invisible on startup and has an initial value, this value will be cleared when the survey is complete."onHiddenContainer" - Clears the value when the question or its container (page or panel) becomes invisible. If a question is invisible on startup and has an initial value, this value will be cleared when the survey is complete."onComplete" - Clears the value when the survey is complete."none" - Never clears the value of an invisible question.This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Removes values that cannot be assigned to this question, for example, choices unlisted in the choices array.
Call this method after you assign new question values in code to ensure that they are acceptable.
This method does not remove values that fail validation. Call the
validate()method to validate newly assigned values.
Sets the question's value and comment properties to undefined.
keepComment, type: boolean
Creates a new object that has the same type and properties as the current SurveyJS object.
Specifies how many columns this survey element spans in the grid layout. Applies only if you set the SurveyModel's gridLayoutEnabled property to true and define the gridLayoutColumns array for the parent page or panel.
Default value: 1
Returns true if the survey element or its child elements have validation errors.
This property contains the result of the most recent validation. This result may be outdated. Call the validate method to get an up-to-date value.
An array of predefined options from which users can select. This property configures an HTML <datalist> element and associates it with the underlying input element.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A value to show in HTML questions and in the dynamic titles and descriptions of survey elements when the question value is empty.
Default value: ""
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A default value for the question. Ignored for question types that cannot have a value (for example, HTML).
The default value is used as a question value in the following cases:
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
An expression used to calculate the defaultValue.
This expression applies until the question value is specified by an end user or programmatically.
An expression can reference other questions as follows:
{other_question_name}{panel.other_question_name} (to access questions inside the same dynamic panel){row.other_question_name} (to access questions inside the same dynamic matrix or multi-column dropdown)An expression can also include built-in and custom functions for advanced calculations. For example, if the defaultValue should be today's date, set the defaultValueExpression to "today()", and the corresponding built-in function will be executed each time the survey is loaded. Refer to the following help topic for more information: Built-In Functions.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Specifies where to display a question description.
Possible values:
"default" (default) - Inherits the setting from the Survey's questionDescriptionLocation property."underTitle" - Displays the description under the question title."underInput" - Displays the description under the interactive area.This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A Boolean expression. If it evaluates to false, this question becomes read-only.
A survey parses and runs all expressions on startup. If any values used in the expression change, the survey re-evaluates it.
Refer to the following help topic for more information: Conditional Visibility.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Specifies the error message position. Overrides the questionErrorLocation property specified for the question's container (survey, page, or panel).
Possible values:
"default" (default) - Inherits the setting from the questionErrorLocation property specified for the question's container."top" - Displays error messages above questions."bottom" - Displays error messages below questions.This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Validation errors. Call the validate() method to validate survey element data.
Moves focus to the input field of this question.
Pass true if you want to focus an input field with the first validation error. Default value: false (focuses the first input field). Applies to question types with multiple input fields.
scrollIfVisible, type: boolean
Assigns a new JSON schema to the current survey element.
The JSON schema should contain only serializable properties of this survey element. Event handlers and properties that do not belong to the survey element are ignored.
A JSON schema that you want to apply to the current survey element.
options, type: ILoadFromJSONOptions ,An object with configuration options.
options.validatePropertyValues, type: boolean ,Pass true if you want to validate property values. Use the jsonErrors array to access validation errors.
Returns a display text that corresponds to the question value. For example, if you call this method for a Dropdown question, it returns an item text instead of an item value.
Applies when the question value is an object (in Matrix, Multiple Text, and similar questions). Pass true if not only values in the object should be display texts, but also keys. Default value: false.
Specify this parameter to get a display text for a specific value, not for the current question value. If the question value is an object, this parameter should be a similar object.
Returns the survey's locale.
If a default locale is used, this method returns an empty string. To get the applied locale in this case, use the following code:
import { surveyLocalization } from 'survey-core';
const defaultLocale = surveyLocalization.defaultLocale;
Returns an array of questions nested within the current question. Use this method to obtain questions within Multiple Text, Dynamic Panel, and Matrix-like questions.
A Boolean value that specifies whether to include only visible nested questions.
includeNested, type: boolean
includeItSelf, type: boolean
An array of nested questions.
Returns the question value as an object in which the question name, title, value, and other parameters are stored as individual properties.
If the question can have more than one value (Matrix, Multiple Text), the object enables the isNode flag and stores information about these values in the data property. Refer to the following help topic for more information: Access Full Survey Results.
Pass an object with the includeEmpty property set to false if you want to skip empty answers.
options, type: IPlainDataOptions
Returns a JsonObjectProperty object with metadata about a serializable property that belongs to the current SurveyJS object.
If the property is not found, this method returns null.
A property name.
Returns the value of a property with a specified name.
If the property is not found or does not have a value, this method returns either undefined, defaultValue specified in the property configuration, or a value passed as the defaultValue parameter.
A property name.
defaultValue, type: any ,(Optional) A value to return if the property is not found or does not have a value.
calcFunc, type: () => any
Returns title location calculated based on the question's titleLocation property and the questionTitleLocation property of the question's containers (survey, page, or panel).
Returns false if the question has no input fields (HTML, Image, and similar question types).
Returns false if the titleLocation property is set to "hidden" or if the question cannot have a title (for example, an HTML question).
If the title property is undefined or set to an empty string, the hasTitle property returns true, because the question uses its name as a title in this case.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A value to assign to the id attribute of the rendered HTML element. A default id is generated automatically.
Increases or decreases an indent of survey element content from the left edge. Accepts positive integer values and 0.
A value passed on to the size attribute of the underlying <input> element.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Specifies text alignment within the input field.
Possible values:
"left" - Aligns input text to the left side."right" - Aligns input text to the right side."auto" (default) - Applies right alignment if a numeric or currency input mask is specified. Otherwise, applies left alignment.This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A value passed on to the type attribute of the underlying <input> element.
Default value: "text"
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Use this method to find out if the current object is of a given typeName or inherited from it.
One of the values listed in the getType() description.
true if the current object is of a given typeName or inherited from it.
Returns true if the survey is being designed in Survey Creator.
Returns true if the question value is an empty string, array, or object or if it equals undefined or null.
Returns true if the object configuration is being loaded from JSON.
Returns true if the survey element is a page.
This property returns false for PageModel objects in the following cases:
SurveyModel's questionsOnPageMode is set to "singlePage".In those cases, the survey creates an internal PageModel object to show all questions on one page, and all regular pages become panels.
Returns true if the survey element is a panel or acts as one.
This property returns true for PageModel objects in the following cases:
SurveyModel's questionsOnPageMode is set to "singlePage".In those cases, the survey creates an internal PageModel object to show all questions on one page, and all regular pages become panels.
Returns true if a parent element (page or panel) is visible.
Returns true if the survey element is a question.
Returns true if the survey element or its parent element is read-only.
If you want to switch a survey element to the read-only state based on a condition, specify the enableIf property. Refer to the following help topic for information: Conditional Visibility.
Makes the question required. If a respondent skips a required question, the survey displays a validation error.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Returns true if the element is a survey.
Returns true if a passed value is an empty string, array, or object or if it equals to undefined or null.
A value to be checked.
trimString, type: boolean ,(Optional) When this parameter is true, the method ignores whitespace characters at the beginning and end of a string value. Pass false to disable this functionality.
An object with properties that configure the mask applied to the input.
Available properties depend on the specified maskType and belong to corresponding classes. Refer to the class APIs for a full list of properties:
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Specifies the type of a mask applied to the input.
Possible values:
"none" (default)"numeric""currency""datetime""pattern"This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A value passed on to the max attribute of the underlying <input> element.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
An error message to display when the question value exceeds the maximum accepted value.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
The maximum text length measured in characters. Assign 0 if the length should be unlimited.
Default value: -1 (inherits the actual value from the SurveyModel's maxTextLength property).
The maximum value specified as an expression. For example, "maxValueExpression": "today(1)" sets the maximum value to tomorrow.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A value passed on to the min attribute of the underlying <input> element.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
An error message to display when the question value is less than the minimum accepted value.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
The minimum value specified as an expression. For example, "minValueExpression": "today(-1)" sets the minimum value to yesterday.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A survey element identifier.
Question names must be unique.
An event that is raised when an ItemValue property is changed.
Parameters:
sender: thisItemValue objects.options.obj: ItemValueItemValue object.options.propertyName: stringItemValue objects is assigned (for example, "choices" or "rows").options.name: "text" | "value"options.newValue: anyAn event that is raised when a property of this SurveyJS object has changed.
Parameters:
sender: thisoptions.name: stringoptions.newValue: anyoptions.oldValue: anyoldValue contains the same array as newValue does.If you need to add and remove property change event handlers dynamically, use the registerPropertyChangedHandlers and unregisterPropertyChangedHandlers methods instead.
An event that is raised when the question's ready state has changed (expressions are evaluated, choices are loaded from a web resource specified by the choicesByUrl property, etc.).
Parameters:
sender: SurveyModeloptions.isReady: booleanoptions.oldIsReady: booleanReturns a page to which the question belongs and allows you to move this question to a different page.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Returns a survey element (panel or page) that contains the question and allows you to move this question to a different survey element.
A Dynamic Panel, Dynamic Matrix, or Dropdown Matrix that includes the current question.
This property is null for standalone questions.
Makes the survey element read-only.
If you want to switch a survey element to the read-only state based on a condition, specify the enableIf property. Refer to the following help topic for information: Conditional Visibility.
Registers a single value change handler for one or multiple properties.
The registerPropertyChangedHandlers and unregisterPropertyChangedHandlers methods allow you to manage property change event handlers dynamically. If you only need to attach an event handler without removing it afterwards, you can use the onPropertyChanged event instead.
An array of one or multiple property names.
handler, type: any ,A function to call when one of the listed properties change. Accepts a new property value as an argument.
key, type: string ,(Optional) A key that identifies the current registration. If a function for one of the properties is already registered with the same key, the function will be overwritten. You can also use the key to subsequently unregister handlers.
Specifies a custom error message for a required form field.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A Boolean expression. If it evaluates to true, this question becomes required.
A survey parses and runs all expressions on startup. If any values used in the expression change, the survey re-evaluates it.
Refer to the following help topic for more information: Conditional Visibility.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A Boolean expression. If it evaluates to true, the question value is reset to default.
A survey parses and runs all expressions on startup. If any values used in the expression change, the survey re-evaluates it.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Assigns a new value to a specified property.
A property name.
val, type: any ,A new value for the property.
An expression that calculates the question value.
The setValueExpression is re-evaluated whenever a referenced question's value changes. If you also specify the setValueIf expression, re-evaluation occurs only when it returns true.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A Boolean expression. If it evaluates to true, the question value is set to a value calculated using the setValueExpression.
A survey parses and runs all expressions on startup. If any values used in the expression change, the survey re-evaluates it.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Specifies whether to show a number for this question. Setting this property to false hides the question number from the title and excludes the question from numbering.
Default value: false (inherited from the SurveyModel's showQuestionNumbers property)
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Disable this property if you want to render the current question on the same line or row with the previous question or panel.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Gets and sets the survey element's expand state.
Possible values:
"default" (default) - The survey element is displayed in full and cannot be collapsed in the UI."expanded" - The survey element is displayed in full and can be collapsed in the UI."collapsed" - The survey element displays only title and description and can be expanded in the UI.A value passed on to the step attribute of the underlying <input> element.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Returns the survey object.
Specifies when to update the question value.
Possible values:
"onBlur" - Updates the value after the input field loses focus."onTyping" - Updates the value on every key press."default" (default) - Inherits the value from the SurveyModel's textUpdateMode property.Do not use the
"onTyping"mode if your survey contains many expressions. Expressions are re-evaluated each time a question value is changed. In"onTyping"mode, the question value changes frequently. This may cause performance degradation.
A title for the survey element. If title is undefined, the name property value is displayed instead.
Empty pages and panels do not display their titles or names.
Sets question title location relative to the input field. Overrides the questionTitleLocation property specified for the question's container (survey, page, or panel).
Possible values:
"default" (default) - Inherits the setting from the questionTitleLocation property specified for the question's container."top" - Displays the title above the input field."bottom" - Displays the title below the input field."left" - Displays the title to the left of the input field."hidden" - Hides the question title.Certain question types (Matrix, Multiple Text) do not support the
"left"value. For them, the"top"value is used.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Returns a JSON schema that corresponds to the current survey element.
An object with configuration options.
options.storeDefaults, type: boolean ,Pass true if the JSON schema should include properties with default values.
A JSON schema of the survey element.
Unregisters value change event handlers for the specified properties.
An array of one or multiple property names.
key, type: string ,(Optional) A key of the registration that you want to cancel.
Specifies whether to use display names for question values in placeholders.
Default value: true
This property applies to questions whose values are defined as objects with the value and text properties (for example, choice items in Radiogroup, Checkbox, and Dropdown questions).
You can use question values as placeholders in the following places:
To use a question value as a placeholder, specify the question name in curly brackets: {questionName}. Refer to the following help topic for more information: Dynamic Texts - Question Values.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Validates this question and returns false if the validation fails.
(Optional) Pass false if you do not want to show validation errors in the UI.
rec, type: any
Question validators.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Gets or sets the question value.
The following table illustrates how the value type depends on the question type:
Question type Value type(s) CheckboxesArray<string | number> Dropdown string | number Dynamic Matrix Array<object> Dynamic Panel Array<object> Expression string | number | boolean File Upload File | Array<File> HTML (no value) Image (no value) Image Picker Array<string | number> Long Text string Multi-Select Dropdown Array<string | number> Multi-Select Matrix object Multiple Textboxes Array<string> Panel (no value) Radio Button Group string | number Ranking Array<string | number> Rating Scale number | string Slider Array<string | number> Signature string (base64-encoded image) Single-Line Input string | number | Date Single-Select Matrix object Yes/No (Boolean) boolean | string
Specifies an object property that should store the question value.
Refer to the Merge Question Values help topic for more information.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Gets or sets question visibility.
If you want to display or hide a question based on a condition, specify the visibleIf property. Refer to the following help topic for information: Conditional Visibility.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
A Boolean expression. If it evaluates to false, this question becomes hidden.
A survey parses and runs all expressions on startup. If any values used in the expression change, the survey re-evaluates it.
Refer to the following help topic for more information: Conditional Visibility.
This property is stored in the survey JSON definition and can be edited in the Survey Creator.
Returns the visible index of the question in the survey. It can be from 0 to all visible questions count - 1 The visibleIndex is -1 if the title is 'hidden' or showNumber is false
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