Systems
Frontend
Plain English
The part users see and use.
Definition
The frontend is the part of a glossarySystemA system is a collection of interconnected components that work together to achieve a specific function or outcome.Open glossary term that users interact with directly, including glossaryInterfaceAn interface is the point of interaction between a user and a system, where inputs are made and outputs are received. It can be visual, physical, or conversational.Open glossary term and visual elements.
In practice
Includes serviceUser Interface DesignCreate clearer interfaces, stronger visual hierarchy, and more consistent product UI without adding unnecessary complexity.Open service, glossaryInteractionInteraction refers to any action a user takes within a product and how the system responds. It includes clicks, taps, gestures, and inputs that drive the user experience.Open glossary term, and client-side logic in web or mobile applications.
In context
It carries the blame for everything the serviceUser ExperienceImprove journeys, reduce friction, and make digital products clearer, simpler, and easier to move through.Open service, including the parts it does not control. A slow API surfaces as a frozen screen, and users describe it as the glossaryInterfaceAn interface is the point of interaction between a user and a system, where inputs are made and outputs are received. It can be visual, physical, or conversational.Open glossary term being broken.
The reality
Frontend quality is often judged instantly by users, making it highly visible but dependent on glossaryBackendThe backend is the part of a system that handles data processing, logic, and server-side operations.Open glossary term glossaryPerformancePerformance refers to how quickly and efficiently a system responds to user actions and processes tasks.Open glossary term.
Compared with
Frontend vs Interface
The frontend is the layer of a glossarySystemA system is a collection of interconnected components that work together to achieve a specific function or outcome.Open glossary term that runs client-side. The glossaryInterfaceAn interface is the point of interaction between a user and a system, where inputs are made and outputs are received. It can be visual, physical, or conversational.Open glossary term is what the user perceives and interacts with. A well-built frontend can still present a poor interface.
FAQ
Common questions
A few practical answers to the questions that usually come up around this term.
What is the frontend?
It is the user-facing part of an application.
What does the frontend include?
serviceUser Interface DesignCreate clearer interfaces, stronger visual hierarchy, and more consistent product UI without adding unnecessary complexity.Open service, glossaryLayoutLayout is the arrangement of elements on a page or screen, determining how content is organised and presented. It influences readability, usability, and overall experience.Open glossary term, and user glossaryInteractionInteraction refers to any action a user takes within a product and how the system responds. It includes clicks, taps, gestures, and inputs that drive the user experience.Open glossary term.
Why is frontend important?
It directly affects serviceUser ExperienceImprove journeys, reduce friction, and make digital products clearer, simpler, and easier to move through.Open service and perception.
What technologies are used in frontend?
HTML, CSS, JavaScript, and glossaryFrameworkA framework is a structured set of tools and conventions used to build applications more efficiently.Open glossary term.
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