This code is also working!

let text = "abc@hotmail.com";
let domain = text.substring(text.lastIndexOf("@"));
if(domain == "@gmail.com" || domain == "@yahoo.com" || domain == "@hotmail.com" || domain == "@outlook.com"){
    console.error("Wrong format")
}else{
    console.log("working email")
}

One way is to get the domain part from the email, and check it against the list of personal email domains:

const workingEmailValidator = email => 
    !['gmail', 'hotmail', 'yahoo', 'outlook'].includes(email.split('@')[1].split('.')[0])

console.log(workingEmailValidator('xyz@sss.com'))

I use my own function after checking if email is valid then you can check if it is work email or not :

const notAllowed = ["gmail.com", "email.com", "yahoo.com", "outlook.com"];
 function check(email) {
    const lastPortion = email.split("@")[1].toLowerCase();
     if (notAllowed.includes(lastPortion)) {
          console.log("Please enter work email");
          return false;
     }
     return true;
}
check("abc@paiman.com");
check("abc@gmail.com.com");