(proto: object)
| 3 | btoa(input: string): string | -1; |
| 4 | |
| 5 | setBufferPrototype(proto: object): void; |
| 6 | |
| 7 | byteLengthUtf8(str: string): number; |
| 8 | copy(source: ArrayBufferView, target: ArrayBufferView, targetStart: number, sourceStart: number, toCopy: number): number; |