2 Check if [`argv`](https://nodejs.org/docs/latest/api/process.html#process_process_argv) has a specific flag.
4 @param flag - CLI flag to look for. The `--` prefix is optional.
5 @param argv - CLI arguments. Default: `process.argv`.
6 @returns Whether the flag exists.
10 // $ ts-node foo.ts -f --unicorn --foo=bar -- --rainbow
13 import hasFlag = require('has-flag');
37 declare function hasFlag(flag: string, argv?: string[]): boolean;