SurveyJS v2.5.6

Released: January 15, 2026

SurveyJS v2.5.6 introduces expression validation in Survey Creator and adds a capability to customize regular expressions dynamically.

Writing and editing expressions is error-prone. This Survey Creator release adds built-in expression validation that helps authors identify issues early. Survey Creator detects three types of errors:

• Unknown variable
  The expression references an undefined variable or an unknown question, panel, or page name. This check is disabled by default. To enable it, set the expressionsValidateVariables property to true.

• Unknown function
  The expression references an unregistered function. You can disable this check by setting the expressionsValidateFunctions property to false.

• Syntax error
  The expression contains invalid syntax, such as unmatched parentheses, missing operands, or invalid operators. You can disable this check by setting the expressionsValidateSyntax property to false. Note that this disables expression validation entirely.

The following example shows how to enable variable validation:

import { SurveyCreatorModel } from "survey-creator-core";

const creatorOptions = {
  expressionsValidateVariables: true
};

const creator = new SurveyCreatorModel(creatorOptions);

In SurveyJS, regular expressions are used to validate user input against custom rules. Previously, you could only define a pattern and specify whether matching should be case-sensitive. This release introduces the onCreateRegexValidator event, which allows you to customize the regular expression and control additional matching behavior via flags.

For example, the following code enables support for Unicode characters in regular expressions:

// ...
// Omitted: `SurveyModel` creation
// ...
survey.onCreateRegexValidator.add((_, options) => {
  options.flags += "u";
});

SurveyJS 2026 Roadmap: What We're Building Next

Survey Creator: How to Translate Forms in the Designer Tab

Survey Creator: How to Translate Forms in the Translations Tab

Form Library

• Expressions: The contains operator ignores the case sensitivity setting (#10784)
• Expressions are not re-evaluated when they depend on a survey object property and that property changes (#10776)
• Question number styling is incorrect after the question's visibility changes (#10775)
• toJSON() with validatePropertyValues: true treats choices whose value is an object as invalid (#10773)
• Localization JSON schemas are generated incorrectly when the survey includes composite or specialized questions (#10771)
• Ranking: Dragging a choice option causes ghosting artifacts (#10743)

Survey Creator

• [Angular] Preview tab: Required mark disappears when the question receives focus (#7368)

npm i survey-core@v2.5.6 survey-angular-ui@v2.5.6 --save
npm i survey-creator-core@v2.5.6 survey-creator-angular@v2.5.6 --save
npm i survey-analytics@v2.5.6 --save
npm i survey-pdf@v2.5.6 --save

npm i survey-core@v2.5.6 survey-react-ui@v2.5.6 --save
npm i survey-creator-core@v2.5.6 survey-creator-react@v2.5.6 --save
npm i survey-analytics@v2.5.6 --save
npm i survey-pdf@v2.5.6 --save

npm i survey-core@v2.5.6 survey-vue3-ui@v2.5.6 --save
npm i survey-creator-core@v2.5.6 survey-creator-vue@2.5.6 --save
npm i survey-analytics@2.5.6 --save
npm i survey-pdf@2.5.6 --save

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