SPA Development
Interactive Browser Applications|Typed API Contracts|Responsive Workflows
Sphere 10 builds single-page applications for products with sustained browser interaction: live dashboards, multi-step editors, collaborative tools and customer workspaces. We pair a deliberate client architecture with .NET backend services so the interface stays responsive while business rules and data access remain under server control.
Design the State Before the Screens
A SPA must distinguish server records, local drafts, navigation state and cached results. We establish those boundaries before choosing component libraries or adding a global state store. React and TypeScript can provide the client implementation, with explicit API contracts connecting it to ASP.NET Core. The client does not become the authority for permissions or transaction rules.
We design direct URLs and browser history alongside in-app navigation. Refreshing a deep route, opening it in a new tab and returning from a login flow must lead to a useful state. Search-indexed public content may use a separate rendering approach where shipping a client application is unnecessary.
Build the Client and Service Together
Our Sphere10 Framework provides reusable .NET application and ASP.NET Core mechanisms for the service side. We shape endpoints around the work users perform, including paging, filtering, command results and conflict responses. Typed client models make contract changes visible during development.
Loading, empty, failed and partially completed states receive the same attention as the successful screen. Requests can be cancelled when navigation changes. We prevent older responses from overwriting newer selections and make repeated actions safe at the server. Uploads, exports and background jobs have progress and recovery paths appropriate to their duration.
Deliver the Complete Browser Application
Acceptance Covers Real Navigation
We test back and forward navigation, direct links, expired sessions, slow responses and concurrent edits. Representative device checks include touch targets and long or wrapped content, not just reduced desktop screenshots. Handover contains the client source, API contracts, build pipeline and regression scenarios. Your team can identify whether a fault belongs to presentation, transport or business behaviour and release those layers with a defined compatibility boundary.
Platforms & Tooling
.NET ASP.NET Core React TypeScript HTML5 CSS OpenAPI Playwright
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