28 lines
772 B
Markdown
28 lines
772 B
Markdown
---
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title: Check if process arguments contain flags
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type: snippet
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language: javascript
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tags: [node]
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cover: white-tablet
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dateModified: 2020-10-22T20:23:47+03:00
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---
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Checks if the current process's arguments contain the specified flags.
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- Use `Array.prototype.every()` and `Array.prototype.includes()` to check if `process.argv` contains all the specified flags.
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- Use a regular expression to test if the specified flags are prefixed with `-` or `--` and prefix them accordingly.
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```js
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const hasFlags = (...flags) =>
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flags.every(flag =>
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process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag)
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);
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```
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```js
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// node myScript.js -s --test --cool=true
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hasFlags('-s'); // true
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hasFlags('--test', 'cool=true', '-s'); // true
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hasFlags('special'); // false
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```
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