Check if argv has a specific flag

Correctly stops looking after an -- argument terminator.

$ npm install --save has-flag

// foo.js
const hasFlag = require('has-flag');

hasFlag('unicorn');
//=> true

hasFlag('--unicorn');
//=> true

hasFlag('-f');
//=> true

hasFlag('foo=bar');
//=> true

hasFlag('foo');
//=> false

hasFlag('rainbow');
//=> false

$ node foo.js -f --unicorn --foo=bar -- --rainbow

Returns a boolean whether the flag exists.

Type: string

CLI flag to look for. The -- prefix is optional.

Type: array
Default: process.argv

CLI arguments.

MIT © Sindre Sorhus