const npmName = require('npm-name');

(async () => {
    console.log(await npmName('chalk'));
    // false

    const result = await npmName.many(['chalk', '@sindresorhus/is', 'abc123'])
    console.log(result.get('chalk'));
    //=> false
    console.log(result.get('@sindresorhus/is'));
    //=> false
    console.log(result.get('abc123'));
    //=> true

    try {
        await npmName('_ABC');
    } catch (error) {
        console.log(error.message);
        // Invalid package name: _ABC
        // - name cannot start with an underscore
        // - name can no longer contain capital letters
    }
})();