Source: https://daphnislabs.com/services/pwa-development

# Progressive Web App Development

Installable web applications with deliberate caching, offline behavior and update handling, shaped around the browsers your users rely on.

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

**Service request**

Offline

Draft **Saved locally**

Submission **Pending**

Add to send queue

**Device cache**

**Server receipt**

## Tools & technologies

-   Service workers
-   Web App Manifest
-   IndexedDB
-   Responsive web UI

## Send a form after reconnecting

Capability Example

A user submits a service form while offline.

### Queue

### Reconnect

### Resolve

Illustrative data. Nothing is sent to an external system.

Example workspace 1 / 3

### Cached application

-   App shell: available
-   Record: locally saved
-   Connection: offline

Store the payload locally and label it as unsent.

### Pending action

-   Action ID: visit-17
-   Saved to local queue
-   Submission still pending

Attempt synchronization when the application has network access.

### Server confirmation

-   Connection restored
-   Action acknowledged once
-   Pending label replaced by confirmed

Show server-side validation errors or confirm receipt before removing the draft.

A confirmed request or a recoverable local draft with clear next steps.

Follow the record through the next step

## Browser applications that handle lost connections.

### Offline fieldwork

Keep selected forms and records available during interrupted connectivity.

### Repeat-use portals

Offer an installable entry point for tasks people return to frequently.

### Mobile web upgrades

Add resilient loading and installation to an existing responsive application.

## An installation and update policy, not just a manifest.

-   **App manifest and install flow**
-   **Cache and update strategy**

-   **Offline conflict handling**
-   **Browser capability test matrix**

## Define which actions can work offline.

### Offline boundary

Specify which records and actions work offline; do not promise the whole product will.

### Browser differences

Installation, notifications and background behavior require target-browser checks.

## Questions before we start.

### Is a responsive website already a PWA?

No. Responsive layout adapts the interface; a PWA adds capabilities such as installation and a defined caching/offline strategy.

### Can updates leave users on an old version?

They can. We design cache versioning and update prompts so an open session is not silently broken.

[Web Application Development](https://daphnislabs.com/services/web-application-development) [Responsive Web Development](https://daphnislabs.com/services/responsive-web-development) [Ionic App Development](https://daphnislabs.com/services/ionic-development)

## Bring your starting point.

Share the browser/device mix and the exact tasks that must work without a connection.

[Discuss your project](https://daphnislabs.com/contact?service=pwa-development) [Explore related services](https://daphnislabs.com/services/web-application-development)