@klnjs/headers v1.0.0-beta.13

@klnjs/permissions-policy

This module provides types and functionality for parsing and stringifying Permissions Policy.

Installation

Install the @klnjs/permissions-policy package using your preferred package manager.

npm install @klnjs/permissions-policy

How to Use

Importing

Import the module, and optionally the PermissionsPolicy type.

import PP, { type PermissionsPolicy } from '@klnjs/permissions-policy'

Parsing

Parse a permission policy string into a PermissionsPolicy object with the parse method:

const policy = PP.parse('camera=(self "https://trusted.com")')

Stringifying

Serialize a PermissionsPolicy object with the stringify method:

const header = PP.stringify({ camera: ['self', '"https://trusted.com"'] })

Validation

Parsing validates directives and allowlists. If an invalid directive or source list is encountered during parsing, a SyntaxError is thrown.

try {
	const policy = PP.parse("invalid-directive 'self'")
} catch (error) {
	console.error(error) // SyntaxError: PermissionsPolicy.parse: invalid directive "invalid-directive"
}