Check 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