Add error into the question error list.

Get is question ready to use

Call this function to clear all errors in the question

Call this function to remove values from the current question, that end-user will not be able to enter. For example the value that doesn't exists in a radigroup/dropdown/checkbox choices or matrix rows/columns.

The question comment value.

Use it to get or set the comment value.

The correct answer on the question. Set this value if you are doing a quiz.

Returns all css classes that used for rendering the question. You may use survey.updateQuestionCssClasses event to override css classes for a question.

Returns the validation errors count.

The link to the custom widget.

Set the default value to the question. It will be assign to the question on loading the survey from JSON or adding a question to the survey or on setting this property of the value is empty.

Question description. It renders under question title by using smaller font. Unlike the title, description can be empty.

Question description location. By default, value is "default" and it depends on survey questionDescriptionLocation property You may change it to "underInput" to render it under question input or "underTitle" to rendered it under title.

An expression that returns true or false. If it returns false the Question becomes read only and an end-user will not able to answer on the qustion. The library runs the expression on survey start and on changing a question value. If the property is empty then readOnly property is used.

Move the focus to the input of this question.

Returns the title after processing the question template.

Returns a copy of question errors survey. For some questions like matrix and panel dynamic it includes the errors of nested questions.

Return the question value as a display text. For example, for dropdown, it would return the item text instead of item value.

Returns the current survey locale

Returns question answer data as a plain object: with question title, name, value and displayValue. For complex questions (like matrix, etc.) isNode flag is set to true and data contains array of nested objects (rows) set options.includeEmpty to false if you want to skip empty answers

Return the title location based on question titleLocation property and QuestionTitleLocation of it's parents

Returns the type of the object as a string as it represents in the json.

Set it to true, to add a comment for the question.

Returns true if there is a validation error(s) in the question.

Returns false if the question doesn't have an input element, for example: QuestionHtmlModel

Returns false if the question doesn't have a title property, for example: QuestionHtmlModel, or titleLocation property equals to "hidden"

The unique identificator. It is generated automatically.

Set it different from 0 to increase the left padding.

Returns true if the question may have a title located on the left

Returns true if the question value is empty

Retuns true if readOnly property is true or survey is in display mode or parent panel/page is readOnly.

Set this property to true, to make the question a required. If a user doesn't answer the question then a validation error will be generated.

Returns true if the question is visible or survey is in design mode right now.

The description of maximum (last) item.

The description of minimum (first) item.

Move question to a new container Page/Panel. Add as a last element if insertBefore parameter is not used or inserted into the given index, if insert parameter is number, or before the given element, if the insertBefore parameter is a question or panel

The property returns the question number. If question is invisible then it returns empty string. If visibleIndex is 1, then no is 2, or 'B' if survey.questionStartIndex is 'A'.

The event is fired when isReady property of question is changed.
options.question - the question
options.isReady - current value of isReady
options.oldIsReady - old value of isReady

Get/set the page where the question is located.

A parent element. It can be panel or page.

Returns the rendred question title.

Returns questions count: 1 for the non-matrix questions and all inner visible questions that has input(s) widgets for question of matrix types.

This property is used to generate rate values if rateValues array is empty. It is the last value in the rating. The default value is 5.

This property is used to generate rate values if rateValues array is empty. It is the first value in the rating. The default value is 1.

This property is used to generate rate values if rateValues array is empty. It is the step value. The number of rate values are (rateMax - rateMin) / rateStep. The default value is 1.

The list of rate items. Every item has value and text. If text is empty, the value is rendered. The item text supports markdown. If it is empty the array is generated by using rateMin, rateMax and rateStep properties.

Remove a particular error from the question error list.

The rendered width of the question.

The custom text that will be shown on required error. Use this property, if you do not want to show the default text.

An expression that returns true or false. If it returns true the Question becomes required and an end-user has to answer it. If it returns false the Question then an end-user may not answer it the Question maybe empty. The library runs the expression on survey start and on changing a question value. If the property is empty then isRequired property is used.

Returns the char/string for a required question.

Set it different from 0 to increase the right padding.

Run visibleIf and enableIf expressions. If visibleIf or/and enabledIf are not empty, then the results of performing the expression (true or false) set to the visible/readOnly properties.

The Question renders on the new line if the property is true. If the property is false, the question tries to render on the same line/row with a previous question/panel.

Question title. Use survey questionTitleTemplate property to change the title question is rendered. If it is empty, then question name property is used.

Set this property different from "default" to set the specific question title location for this panel/page.

Use it to choose how other question values will be rendered in title if referenced in .

The list of question validators.

Get/Set the question value.

Use this property if you want to store the question result in the name different from the question name. Question name should be unique in the survey and valueName could be not unique. It allows to share data between several questions with the same valueName. The library set the value automatically if the question.name property is not valid. For example, if it contains the period '.' symbol. In this case if you set the question.name property to 'x.y' then the valueName becomes 'x y'.

Use it to get/set the question visibility.

An expression that returns true or false. If it returns true the Question becomes visible and if it returns false the Question becomes invisible. The library runs the expression on survey start and on changing a question value. If the property is empty then visible property is used.

Returns the visible index of the question in the survey. It can be from 0 to all visible questions count - 1

Use it to set the specific width to the question like css style (%, px, em etc).