JavaScript Security Best Practices — a practical guide to JavaScript security best practices with clear examples you can reuse in real projects.
JavaScript Tutorial Series (98/101). Prefer one article? Read the complete JavaScript tutorial.
Short description
Never trust client-side checks alone; sanitize/escape untrusted HTML.
Security checklist
textContent over unsafe innerHTML
CSP where possible
Don't store secrets in JS/localStorage
Validate server-side
Depend on vetted libs