RegexValidator

Creates a new object that has the same type and properties as the current SurveyJS object.

Type:

() => Base

Implemented in:

Base

Assigns a new configuration to the current SurveyJS object. This configuration is taken from a passed JSON object.

The JSON object should contain only serializable properties of this SurveyJS object. Event handlers and properties that do not belong to the SurveyJS object are ignored.

Type:

(json: any, options?: ILoadFromJSONOptions) => void

Parameters:

json, type: any ,

A JSON object with properties that you want to apply to the current SurveyJS object.

options, type: ILoadFromJSONOptions ,

An object with configuration options.

Implemented in:

Base

See also:

toJSON

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.

Type:

(propName: string) => JsonObjectProperty

Parameters:

propName, type: string ,

A property name.

Implemented in:

Base

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.

Type:

(name: string, defaultValue?: any) => any

Parameters:

name, type: string ,

A property name.

defaultValue, type: any ,

(Optional) A value to return if the property is not found or does not have a value.

Implemented in:

Base

Returns the object type as it is used in the JSON schema.

Type:

() => string

Implemented in:

Base

Returns true if the object is included in a survey.

This property may return false, for example, when you create a survey model dynamically.

Type:

boolean readonly

Implemented in:

Base

Use this method to find out if the current object is of a given typeName or inherited from it.

Type:

(typeName: string) => boolean

Parameters:

typeName, type: string ,

One of the values listed in the getType() description.

Return Value:

true if the current object is of a given typeName or inherited from it.

Implemented in:

Base

See also:

getType

Returns true if the survey is being designed in Survey Creator.

Type:

boolean readonly

Implemented in:

Base

Returns true if the object configuration is being loaded from JSON.

Type:

boolean readonly

Implemented in:

Base

Returns true if a passed value is an empty string, array, or object or if it equals to undefined or null.

Type:

(value: any, trimString?: boolean) => boolean

Parameters:

value, type: any ,

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.

Implemented in:

Base

An event that is raised when an ItemValue property is changed.

Parameters:

• sender: this
  A SurveyJS object whose property contains an array of ItemValue objects.
• options.obj: ItemValue
  An ItemValue object.
• options.propertyName: string
  The name of the property to which an array of ItemValue objects is assigned (for example, "choices" or "rows").
• options.name: "text" | "value"
  The name of the changed property.
• options.newValue: any
  A new value for the property.

Type:

Event<(sender: Base, options: any) => any, Base, any>

Implemented in:

Base

An event that is raised when a property of this SurveyJS object has changed.

Parameters:

• sender: this
  A SurveyJS object whose property has changed.
• options.name: string
  The name of the changed property.
• options.newValue: any
  A new value for the property.
• options.oldValue: any
  An old value of the property. If the property is an array, oldValue contains the same array as newValue does.

Type:

EventBase<Base, any>

Implemented in:

Base

The regex property.

Type:

string writable

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

Implemented in:

RegexValidator

Registers a function to call when a property value changes.

Type:

(propertyNames: string[], handler: any, key?: string) => void

Parameters:

propertyNames, type: string[] ,

An array of one or multiple property names.

handler, type: any ,

A function to call when one of the listed properties change.

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.

Implemented in:

Base

See also:

unregisterPropertyChangedHandlers

Assigns a new value to a specified property.

Type:

(name: string, val: any) => void

Parameters:

name, type: string ,

A property name.

val, type: any ,

A new value for the property.

Implemented in:

Base

Returns a JSON object that corresponds to the current SurveyJS object.

Type:

(options?: ISaveToJSONOptions) => any

Parameters:

options, type: ISaveToJSONOptions

Implemented in:

Base

See also:

fromJSON

Unregisters value change event handlers for the specified properties.

Type:

(propertyNames: string[], key?: string) => void

Parameters:

propertyNames, type: string[] ,

An array of one or multiple property names.

key, type: string ,

(Optional) A key of the registration that you want to cancel.

Implemented in:

Base

See also:

registerPropertyChangedHandlers