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$ curl repovive.com/roadmaps/frontend-system-design-interview-prep/security/authorization-on-frontend

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$ curl repovive.com/roadmaps/frontend-system-design-interview-prep/security/authorization-on-frontend

Repovive

Authorization on Frontend - Security | Frontend System Design Interview Prep | Repovive

Repovive.

Frontend System Design Interview Prep17 sections · 206 units12h total

Open in Course

Authorization on Frontend

UI vs real security

Frontend authorization is for UX, not security.

Frontend role:

Hide UI elements user shouldn't see
Prevent accidental unauthorized actions
Improve user experience

Backend role:

Enforce permissions
Validate every request
Never trust client claims

Example:

// UI: Hide delete button for non-admins
{user.isAdmin && <DeleteButton />}

// Backend: MUST verify admin on delete request

Interview tip: State explicitly that frontend authorization is UX only. Backend must enforce.