# What Versions of Next.js, React, and TypeScript Are Used in DeskcommCRM

> Discover the exact versions of Next.js, React, and TypeScript powering DeskcommCRM. Learn about the stack in this technical overview.

- Repository: [Rafael Melgaço/DeskcommCRM](https://github.com/melgarafael/DeskcommCRM)
- Tags: getting-started
- Published: 2026-09-12

---

**DeskcommCRM runs on Next.js 16.3.4, React 19.2.8, and TypeScript 6 with strict mode enabled according to the repository's [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) and [`AGENTS.md`](https://github.com/melgarafael/DeskcommCRM/blob/main/AGENTS.md) files.**

DeskcommCRM is a modern customer relationship management application built on the latest major releases of the React ecosystem. The project explicitly declares these core dependencies in its root configuration files to ensure consistent development environments across all contributors.

## Next.js Version Configuration

DeskcommCRM uses **Next.js 16.3.4**, declared with a caret (`^`) prefix to allow compatible minor and patch updates within the major 16 series.

### Where the Next.js Version Is Defined

In the root [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) file at line 79, the dependency appears as:

```json
{
  "dependencies": {
    "next": "^16.3.4"
  }
}

```

The caret range permits automatic updates to any `16.x.x` release while preventing breaking changes from a potential Next.js 17 upgrade. This configuration is reinforced by the [`next.config.js`](https://github.com/melgarafael/DeskcommCRM/blob/main/next.config.js) file, which implements Next.js 16-specific optimizations such as `swcMinify: true`.

## React Version Configuration

The project runs on **React 19.2.8**, including both the core React library and ReactDOM.

### React Dependency Declaration

Lines 84-85 of [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) specify the React versions:

```json
{
  "dependencies": {
    "react": "^19.2.8",
    "react-dom": "^19.2.8"
  }
}

```

The corresponding TypeScript type definitions are maintained as devDependencies:

- `@types/react`: `^19.2.18`
- `@types/react-dom`: `^19.2.5`

This alignment ensures type safety matches the runtime behavior of React 19 features.

## TypeScript Version and Strict Mode

DeskcommCRM targets **TypeScript 6** with strict mode enabled across the entire codebase.

### Documentation in AGENTS.md

According to the architecture documentation in [`AGENTS.md`](https://github.com/melgarafael/DeskcommCRM/blob/main/AGENTS.md), the project explicitly adopts "TypeScript 6 estrito" (strict), establishing a high bar for type safety and preventing implicit `any` types throughout the application.

### tsconfig.json Compiler Settings

The [`tsconfig.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/tsconfig.json) file enforces these strict requirements with the following configuration:

```json
{
  "compilerOptions": {
    "target": "ES2022",
    "module": "ESNext",
    "strict": true,
    "noImplicitAny": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  },
  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
  "exclude": ["node_modules"]
}

```

The `strict: true` flag activates all strict type-checking options, including `noImplicitAny`, `strictNullChecks`, and `strictFunctionTypes`, which is consistent with the TypeScript 6 strict mode mandate documented in the project's standards.

## Verifying Versions Locally

To confirm these versions in your local development environment, run the following commands in the project root:

```bash

# Check Next.js version

npm list next

# Check React version  

npm list react react-dom

# Check TypeScript version

npx tsc --version

```

These commands will report the installed versions that match the caret ranges defined in [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json).

## Summary

- **Next.js 16.3.4**: Declared at line 79 of [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) with `^16.3.4`, allowing minor updates within version 16.
- **React 19.2.8**: Specified at lines 84-85 of [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) for both `react` and `react-dom` packages.
- **TypeScript 6**: Documented in [`AGENTS.md`](https://github.com/melgarafael/DeskcommCRM/blob/main/AGENTS.md) as the strict TypeScript target, enforced via [`tsconfig.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/tsconfig.json) with `strict: true` and `noImplicitAny: true`.
- **Configuration Files**: Key files include [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) for dependency declarations, [`AGENTS.md`](https://github.com/melgarafael/DeskcommCRM/blob/main/AGENTS.md) for architectural standards, [`tsconfig.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/tsconfig.json) for compiler rules, and [`next.config.js`](https://github.com/melgarafael/DeskcommCRM/blob/main/next.config.js) for Next.js-specific settings.

## Frequently Asked Questions

### How do I check which versions of Next.js, React, and TypeScript are installed in DeskcommCRM?

Run `npm list next react react-dom` to see the current installed versions, or check the `dependencies` section in [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) at lines 79 and 84-85. For TypeScript, run `npx tsc --version` or review the [`AGENTS.md`](https://github.com/melgarafael/DeskcommCRM/blob/main/AGENTS.md) file which documents the TypeScript 6 requirement.

### Can I upgrade to a newer major version of Next.js or React?

The current [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) uses caret (`^`) prefixes that automatically accept minor and patch updates within the same major version. Upgrading to Next.js 17 or React 20 would require manually editing the version constraints in [`package.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/package.json) and verifying compatibility with the TypeScript 6 strict configuration.

### Where is the TypeScript strict mode configured?

The strict mode is enabled in [`tsconfig.json`](https://github.com/melgarafael/DeskcommCRM/blob/main/tsconfig.json) via the `"strict": true` compiler option. This setting is documented in [`AGENTS.md`](https://github.com/melgarafael/DeskcommCRM/blob/main/AGENTS.md) as part of the project's commitment to TypeScript 6 strict standards, ensuring consistent type safety across all contributions.

### What does the caret (^) symbol mean in the version numbers?

The caret allows updates that do not modify the left-most non-zero digit. For `^16.3.4`, this permits updates to any `16.x.x` version but not `17.0.0`. This ensures DeskcommCRM receives security patches and features within Next.js 16 and React 19 while preventing automatic major version migrations that could introduce breaking changes.