Define frontend delivery through complete interactions, data states and acceptance evidence rather than a count of pages. Include integration with real services, responsive behaviour, accessibility, performance and recovery. A visually accurate screen using mock data does not establish that users can complete the intended task in the supported environment.
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Agree the responsibility boundary
Document which team owns design rules, content, APIs, authentication, analytics and deployment. Identify where the frontend must enforce presentation behaviour and where the backend establishes authoritative access and business acceptance.
Make dependencies explicit. Missing data contracts, unstable authentication or unfinished content can change delivery work even when the screen layout is approved.
Create acceptance criteria by area
| Area | Requirement to specify | Evidence to request |
|---|---|---|
| Interaction | Complete task and transitions | Representative journey |
| Data states | Loading, empty, partial and error behaviour | Controlled dependency failures |
| Accessibility | Supported methods and agreed standard | Defined manual and automated checks |
| Performance | Relevant tasks, devices and measures | Documented test conditions |
| Integration | Real contract and authoritative result | Accepted and rejected requests |
| Responsive behaviour | Supported layouts and content constraints | Representative viewport review |
| Operation | Error reporting and release ownership | Investigation and deployment exercise |
The table is a delivery worksheet, not an exhaustive standard or a guarantee of a particular performance score.
Test one realistic task
Suppose a user filters a long request list and opens an approval. Include slow responses, no matches, an expired session and a record changed by another person.
The frontend should explain the actual state and offer an appropriate next action. A spinner that never resolves, a blank result that hides failure or a success message before backend acceptance leaves essential behaviour unspecified.
Measure performance in context
Google's Web Vitals guidance describes user-experience measures including loading, responsiveness and visual stability. Choose relevant measures and record whether evidence comes from controlled tests or actual user conditions.
Do not promise that one laboratory score establishes the experience of every customer. Data volume, device capability, network conditions and external dependencies affect the task. Keep the test boundary and known limitations alongside the result.
Make accessibility a shared responsibility
Define the agreed verification scope and responsible people. Designers, content owners, frontend engineers and backend teams can each affect the final task experience.
W3C's accessibility planning resources provide useful responsibility context. Treat automated checks as one source of evidence, not a substitute for examining interaction, content and recovery through the required user journeys.
Define completion and handover
Agree which environments, API states and deployment configuration must be verified. Retain the component and behaviour decisions needed by the receiving team.
If an external dependency remains unavailable, describe what was tested with a substitute and what still needs verification. Do not present mocked success as completed integration.
Questions buyers ask
Is frontend work only visual implementation?
No. Its scope often includes interaction, state, integration and user-facing failure behaviour. Define those responsibilities explicitly.
Can frontend checks prove backend security?
No. Access and business rules require the appropriate independently enforced service controls and technical verification.
Prepare the frontend brief
Bring journeys, API contracts and supported environments. Use the dashboard state guide and UI/UX design overview to scope complete delivery.