---

title: Document directive

slug: Glossary/Document_directive

page-type: glossary-definition

---

{{GlossarySidebar}}

In {{Glossary("CSP")}}, **document directives** are used in a {{HTTPHeader("Content-Security-Policy")}} header and govern the properties of a document or [worker](/en-US/docs/Web/API/Web_Workers_API) environment to which a policy applies.

Document directives don't fall back to the {{CSP("default-src")}} directive.

See [Document directives](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#document_directives) for a complete list.

## See also