AesKeyGenParamsdictionary of the Web 加密 API represents the object that should be passed as the
SubtleCrypto.generateKey(), when generating an AES key: that is, when the algorithm is identified as any of AES-CBC , AES-CTR , AES-GCM ，或 AES-KW .
DOMString. This should be set to
AES-KW, depending on the algorithm you want to use.
— the length in bits of the key to generate. This must be one of: 128, 192, or 256.
See the examples for
Web Cryptography API
The definition of 'SubtleCrypto.AesKeyGenParams' in that specification.
Browsers that support any of the the AES-based algorithms for the
method will support this type.