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Angular Filterable / Searchable User List

By FrontendAtlas Team · Updated Jan 30, 2026

Filter a user list in Angular by search and role without mutating the original array. Derive results in the template or a getter, and show an empty state when no matches exist. Angular focus: derive filtered lists in a getter or a pure pipe. Framework…

Use a standalone Angular component as the root component.
Define a fixed in-memory list of users (name, role, active flag).

What you’ll build / What this tests

This premium angular coding focuses on Angular Filterable / Searchable User List. You’ll apply components and state thinking with intermediate level constraints. The prompt emphasizes Filter a user list in Angular by search and role without mutating the original array. Derive….

Learning goals

Translate the prompt into a clear angular API signature and return shape.
Apply components, state, lists techniques to implement angular filterable / searchable user list.
Handle intermediate edge cases without sacrificing readability.
Reason about time/space complexity and trade-offs in angular.

Key decisions to discuss

Define the exact input/output contract before coding.
Choose iteration vs higher-order methods for readability.
Decide on concurrency and error propagation behavior.
Prioritize predictable edge-case handling over micro-optimizations.

Evaluation rubric

Correctness: covers required behaviors and edge cases.
Clarity: readable structure and predictable control flow.
Complexity: avoids unnecessary work for large inputs.
API discipline: no mutation of inputs; returns expected shape.
Testability: solution is easy to unit test.

Constraints / Requirements

Use a standalone Angular component as the root component.
Define a fixed in-memory list of users (name, role, active flag).
Render a search input that filters by name (case-insensitive).
Render a role dropdown (e.g. All, Admin, Editor, Viewer) that filters by role.
Render a checkbox that, when checked, shows only active users.
Render the filtered list below the controls.
Initially, all users are shown.
Typing in the search box filters users whose name includes the search text (case-insensitive).
Changing the role dropdown filters by that role (or shows all roles when "All" is selected).
Checking the "Only active" checkbox hides inactive users.

Mini snippet (usage only)

// Example usage
const input = /* angular filterable / searchable user list input */;
const result = solve(input);
console.log(result);

// Edge case check
const empty = input ?? null;
const fallback = solve(input);
console.log(fallback);

// Expected: describe output shape, not the implementation
// (no solution code in preview)

Common pitfalls

Mutating inputs instead of returning a new value.
Skipping edge cases like empty input, duplicates, or nulls.
Overlooking time complexity for large inputs.