javascript: strict e-mail address verification

validEmail.js

/**
 * Provides strict verification of e-mail address 
 * Includes support for unicode
 *
 * @param  string  E-mail address to verify
 * @return boolean True if e-mail address is valid, false otherwise
 */

const validEmail = (email) =>
    Object.prototype.toString.call(email).slice(8, -1) === String.name &&
        email &&
        email.length < 256 &&
        /^(?:[0-z!#$%&'*+/=?^_`{|}.~-]|[^\u0000-\u007F]){1,64}@(?:(?:[0-z-]|[^\u0000-\u007F]){1,62}\.)+(?:[0-z]|[^\u0000-\u007F]){2,63}$/i.test(email) &&
        !(email.includes('..') ||
          email.startsWith('.') ||
          email.includes('.@') ||
          email.includes('-.') ||
          email.includes('.-'))