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/** | ||
* Stores the Trusted Types Policy. Starts as undefined and can be set to null | ||
* if Trusted Types is not supported in the browser. | ||
*/ | ||
let policy: TrustedTypePolicy | null | undefined | ||
|
||
/** | ||
* Getter for the Trusted Types Policy. If it is undefined, it is instantiated | ||
* here or set to null if Trusted Types is not supported in the browser. | ||
*/ | ||
function getPolicy() { | ||
if (typeof policy === 'undefined' && typeof window !== 'undefined') { | ||
policy = | ||
window.trustedTypes?.createPolicy('nextjs', { | ||
createHTML: (input) => input, | ||
createScript: (input) => input, | ||
createScriptURL: (input) => input, | ||
}) || null | ||
} | ||
|
||
return policy | ||
} | ||
|
||
/** | ||
* Unsafely promote a string to a TrustedScriptURL, falling back to strings | ||
* when Trusted Types are not available. | ||
* This is a security-sensitive function; any use of this function | ||
* must go through security review. In particular, it must be assured that the | ||
* provided string will never cause an XSS vulnerability if used in a context | ||
* that will cause a browser to load and execute a resource, e.g. when | ||
* assigning to script.src. | ||
*/ | ||
export function __unsafeCreateTrustedScriptURL( | ||
url: string | ||
): TrustedScriptURL | string { | ||
return getPolicy()?.createScriptURL(url) || url | ||
} |
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