History

Michaël Zasso 30fdd482a1 tools: move ESLint to tools/eslint Greatly simplify how ESLint and its plugins are installed. PR-URL: https://github.com/nodejs/node/pull/53413 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>		2024-06-20 14:45:27 +02:00
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index.js	…
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readme.md

has-flag

Check if argv has a specific flag

Correctly stops looking after an -- argument terminator.

Install

$ npm install has-flag

Usage

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

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

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

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

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

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

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

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

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

API

hasFlag(flag, [argv])

Returns a boolean for whether the flag exists.

flag

Type: string

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

argv

Type: string[]
Default: process.argv

CLI arguments.