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What are the best practices for handling authentication tokens in Angular?

Senior Angular
Quick Answer Auth token best practices in Angular: store tokens in memory (not localStorage - XSS risk) or HttpOnly cookies (CSRF protection needed). Use interceptors to attach tokens to requests automatically. Implement token refresh logic with catchError and retry. Clear tokens on logout. Short-lived access tokens with refresh tokens is the recommended pattern.

Answer

Token handling must prioritize security. Best practices include:

  • Store tokens in memory or sessionStorage (avoid localStorage for sensitive apps).
  • Use HttpOnly cookies when backend supports them.
  • Add tokens only through interceptors.
  • Avoid placing tokens in URLs.
  • Implement token refresh + logout on refresh failure.
  • Never expose secrets in frontend code.
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SugharaIQ Editorial Team Verified Answer

This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.

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Source: SugharaIQ

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