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71 lines
986 B
Markdown
71 lines
986 B
Markdown
# has-flag [](https://travis-ci.org/sindresorhus/has-flag)
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> Check if [`argv`](https://nodejs.org/docs/latest/api/process.html#process_process_argv) has a specific flag
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Correctly stops looking after an `--` argument terminator.
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## Install
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```
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$ npm install has-flag
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```
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## Usage
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```js
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// foo.js
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const hasFlag = require('has-flag');
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hasFlag('unicorn');
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//=> true
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hasFlag('--unicorn');
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//=> true
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hasFlag('f');
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//=> true
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hasFlag('-f');
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//=> true
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hasFlag('foo=bar');
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//=> true
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hasFlag('foo');
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//=> false
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hasFlag('rainbow');
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//=> false
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```
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```
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$ node foo.js -f --unicorn --foo=bar -- --rainbow
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```
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## API
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### hasFlag(flag, [argv])
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Returns a boolean for whether the flag exists.
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#### flag
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Type: `string`
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CLI flag to look for. The `--` prefix is optional.
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#### argv
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Type: `string[]`<br>
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Default: `process.argv`
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CLI arguments.
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## License
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MIT © [Sindre Sorhus](https://sindresorhus.com)
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