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developer.mozilla.org
I included this MDN reference because you’ll constantly come back to the exact CSP directives and what they mean. When you’re tuning script-src or adding more sources, this doc helps you do it properly instead of guessing.
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Pros
- +Detailed reference for CSP directives
- +Good for understanding how default-src interacts with other directives
Cons
- -Documentation-heavy; you still need to test in your app
