Directive: manifest src

Overview

The manifest-src directive specifies which Web app manifests can be applied to the resource.

Affects: Web app manifests

Required reading:

• Can I use manifest-src?
• MDN Web Docs reference

Usage examples

Accepts one or more schemes or hosts, the 'self' keyword, or the 'none' keyword.

manifest-src 'none'

manifest-src 'self'

manifest-src example.com

manifest-src example.com example.org

manifest-src https://*.example.com

manifest-src https:

Fallbacks

✅ manifest-src will fallback to default-src if it is undefined.

• default-src
  • manifest-src

Possible errors

[ERROR] directive manifest-src has an invalid value

Possible allowed values for manifest-src are:

1. 'none'
2. A scheme like https:
3. A host like example.com (internationalized domain names are not permitted and must be converted to punycode first)
4. A keyword like 'self'
5. A nonce (although this is highly unusual)
6. A sha256 hash (although this is highly unusual)

This error message means that the value does not match expected/correct patterns for any of these types.

For developers

ABNF (CSP3)

directive-name  = "manifest-src"
directive-value = serialized-source-list

See ABNF: serialized-source-list

Type

• source-list in CSP2
• serialized-source-list in CSP3

References

• CSP Level 3 reference
• MDN Web Docs reference
• Can I use manifest-src?