Source: https://daphnislabs.com/services/mean-stack-development

# MEAN Stack Development

Applications combining MongoDB, Express, Angular and Node.js, with one coherent contract from browser forms to persisted documents.

[Discuss your project](https://daphnislabs.com/contact?service=mean-stack-development) [Try the example](https://daphnislabs.com/services/mean-stack-development#worked-example)

A **Angular** Typed form

E **Express** API validation

N **Node.js** Application logic

M **MongoDB** Versioned document

## Tools & technologies

-   MongoDB
-   Express
-   Angular
-   Node.js

## Edit a configurable request

Capability Example

A portal user updates a request with optional fields and nested items.

### Validate

### Persist

### Refresh

Illustrative data. Nothing is sent to an external system.

Example workspace 1 / 3

### Typed request

```
Request: R-17
Optional fields validated
Expected revision: 4
```

Check field rules in the Angular form and again in the API.

### MongoDB update

```
Current revision: 4
Nested items updated
New revision: 5
```

Update the document only if its expected revision still matches.

### Browser record

```
Canonical response received
Revision: 5
Form reflects saved values
```

Return the canonical saved record to the client.

A consistent request revision or a conflict response that preserves the user's draft.

Follow the record through the next step

## Connect the browser, API and document model.

### Business applications

Connected screens and APIs for workflows built around document-shaped records.

### Customer portals

Account and request management with controlled access to each record.

### MEAN maintenance

Upgrade frontend and backend dependencies while preserving data compatibility.

## A complete feature across the MEAN stack.

-   **Angular client and Express API**
-   **MongoDB schema and indexes**

-   **Cross-layer integration tests**
-   **Deployment and migration guide**

## Share types without blurring responsibilities.

### Data model

Choose document boundaries and indexes from actual query and update patterns.

### Stack compatibility

Agree framework versions and deployment ownership across all four layers.

## Questions before we start.

### Does MEAN include AngularJS?

Modern MEAN commonly uses Angular. An existing AngularJS-based stack needs its own compatibility and migration plan.

### Must every product use MongoDB?

No. If relational constraints are a better fit, a different full-stack architecture may be more appropriate.

[Full Stack Development](https://daphnislabs.com/services/full-stack-development) [Angular Development](https://daphnislabs.com/services/angular-development) [Node.js Development](https://daphnislabs.com/services/nodejs-development)

## Bring your starting point.

Bring the core record structure, main queries and any existing MEAN repositories.

[Discuss your project](https://daphnislabs.com/contact?service=mean-stack-development) [Explore related services](https://daphnislabs.com/services/full-stack-development)