𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗚𝘂𝗶𝗱𝗲

𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗚𝘂𝗶𝗱𝗲

Frontend security is not only a backend job. It is your first line of defense. A secure frontend stops attacks before they reach your server.

XSS is a common risk. Attackers inject scripts into your app.

• Never put user content in the DOM without cleaning it.
• Use textContent.
• Avoid innerHTML.

CSRF tricks users into taking actions.

• Use CSRF tokens.
• Use SameSite cookies.

CSP is a strong tool. It limits scripts loading on your page. It stops most XSS attacks.

Store tokens correctly.

• Use HttpOnly cookies.
• Use Secure and SameSite=Strict flags.
• Never use localStorage for tokens.

Handle scripts with care.

• Self-host critical scripts.
• Use Subresource Integrity tags for CDNs.

Broken access control is a huge risk. Always verify permissions on the backend. Never trust the client.

Secure your workflow.

• Use a secrets manager for API keys.
• Run SAST tools on every PR.
• Scan dependencies for bugs.

Think like an attacker. Ask how someone will abuse your feature. Study the OWASP Top 10.

Your action plan:

• This week: Run a security audit.
• This month: Set security headers.
• This quarter: Practice a breach response.

Source: https://dev.to/therizwansaleem/frontend-security-xss-csrf-csp-and-secure-authentication-flows-4n6c