3.1.1

Author: sequba

.eslintrc.js

@@ -6,7 +6,13 @@ module.exports = {
     '@typescript-eslint',
     'license-header',
     'jsdoc',
+    'jasmine',
+    'jest',
   ],
+  env: {
+    jasmine: true,
+    'jest/globals': true,
+  },
   parserOptions: {
     tsconfigRootDir: __dirname,
     project: './tsconfig.test.json',
@@ -17,6 +23,9 @@ module.exports = {
     'plugin:@typescript-eslint/eslint-recommended',
     'plugin:@typescript-eslint/recommended',
     'plugin:@typescript-eslint/recommended-requiring-type-checking',
+    'plugin:jasmine/recommended',
+    'plugin:jest/recommended',
+    'plugin:jest/style',
   ],
   rules: {
     // Automatic fixers
@@ -113,6 +122,13 @@ module.exports = {
         MethodDefinition: true,
       }
     }],
+    'jest/no-jasmine-globals': 'off',
+    'jest/no-alias-methods': 'off',
+    'jest/no-conditional-expect': 'warn',
+    'jest/no-standalone-expect': 'warn',
+    'jest/no-test-prefixes': 'off',
+    'jest/prefer-to-be': 'warn',
+    'jest/prefer-to-have-length': 'off',
   },
   overrides: [
     {
@@ -127,5 +143,11 @@ module.exports = {
         'sort-keys': ['error', 'asc'],
       }
     },
+    {
+      files: ['**/*.spec.ts'],
+      rules: {
+        '@typescript-eslint/no-non-null-assertion': 'off',
+      }
+    }
   ],
 }

.github/workflows/audit.yml

@@ -32,4 +32,4 @@ jobs:
 
       - name: Run audit
         run: |
-          npm audit --omit='dev'
+          npm run audit

CHANGELOG.md

@@ -7,6 +7,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## [3.1.1] - 2025-12-18
+
+### Fixed
+
+- Fixed an issue where cells were not recalculated after adding, removing and renaming sheets. [#1116](https://github.com/handsontable/hyperformula/issues/1116)
+- Fixed an issue where overwriting a non-computed cell caused the `Value of the formula cell is not computed` error. [#1194](https://github.com/handsontable/hyperformula/issues/1194)
+
 ## [3.1.0] - 2025-10-14
 
 ### Changed

README.md

@@ -25,8 +25,11 @@
 HyperFormula is a headless spreadsheet built in TypeScript, serving as both a parser and evaluator of spreadsheet formulas. It can be integrated into your browser or utilized as a service with Node.js as your back-end technology.
 
 ## What HyperFormula can be used for?
+
 HyperFormula doesn't assume any existing user interface, making it a general-purpose library that can be used in various business applications. Here are some examples:
 
+- Deterministic compute layer for AI & LLMs
+- Calculated fields in CRM and ERP software
 - Custom spreadsheet-like app
 - Business logic builder
 - Forms and form builder

docs/guide/compatibility-with-microsoft-excel.md

@@ -13,6 +13,17 @@ That said, there are cases when HyperFormula can't be compatible with all three
 
 Still, with the right configuration, you can achieve nearly full compatibility.
 
+### Excel function coverage
+
+HyperFormula implements **350 out of 515 Excel functions** (68% coverage), as of version 3.1.0 and Excel 2024. This means that **165 Excel functions** (32%) are not yet available in HyperFormula.
+
+Additionally, HyperFormula includes some functions that are not part of Excel's standard function set, bringing the total number of available functions to **{{ $page.functionsCount }}**.
+
+For a complete list of supported functions, see the [built-in functions](built-in-functions.md) page.
+
+If you need any of the missing Excel functions, you can [contact us](contact.md) or implement them as [custom functions](custom-functions.md), extending HyperFormula's capabilities to meet your specific requirements.
+
+
 ## Configure compatibility with Microsoft Excel
 
 ### String comparison rules

docs/guide/release-notes.md

@@ -6,6 +6,15 @@ This page lists HyperFormula release notes. The format is based on
 HyperFormula adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 3.1.1
+
+**Release date: December 18, 2025**
+
+### Fixed
+
+- Fixed an issue where cells were not recalculated after adding, removing and renaming sheets. [#1116](https://github.com/handsontable/hyperformula/issues/1116)
+- Fixed an issue where overwriting a non-computed cell caused the `Value of the formula cell is not computed` error. [#1194](https://github.com/handsontable/hyperformula/issues/1194)
+
 ## 3.1.0
 
 **Release date: October 14, 2025**

docs/index.md

@@ -30,8 +30,11 @@ description: HyperFormula® - An open-source headless spreadsheet for business w
 HyperFormula is a headless spreadsheet built in TypeScript, serving as both a parser and evaluator of spreadsheet formulas. It can be integrated into your browser or utilized as a service with Node.js as your back-end technology.
 
 ## What HyperFormula can be used for?
+
 HyperFormula doesn't assume any existing user interface, making it a general-purpose library that can be used in various business applications. Here are some examples:
 
+- Deterministic compute layer for AI & LLMs
+- Calculated fields in CRM and ERP software
 - Custom spreadsheet-like app
 - Business logic builder
 - Forms and form builder

ht.config.js

@@ -6,5 +6,5 @@ module.exports = {
   HT_VERSION: packageBody.version,
   HT_PACKAGE_NAME: packageBody.name,
   HT_BUILD_DATE: moment().format('DD/MM/YYYY HH:mm:ss'),
-  HT_RELEASE_DATE: '14/10/2025',
+  HT_RELEASE_DATE: '18/12/2025',
 };