Check if process arguments contain flags

JavaScript, Node · Oct 22, 2020

Checks if the current process's arguments contain the specified flags.

Use Array.prototype.every() and Array.prototype.includes() to check if process.argv contains all the specified flags.
Use a regular expression to test if the specified flags are prefixed with - or -- and prefix them accordingly.

const hasFlags = (...flags) =>
  flags.every(flag =>
    process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag)
  );

// node myScript.js -s --test --cool=true
hasFlags('-s'); // true
hasFlags('--test', 'cool=true', '-s'); // true
hasFlags('special'); // false

Checks if the given argument is a duplex (readable and writable) stream.

JavaScript, Node · Oct 20, 2020

Checks if the given argument is a writable stream.

JavaScript, Node · Oct 20, 2020

Gets the command-line arguments passed to a Node.js script.

JavaScript, Node · Apr 26, 2022

More like this