throw.ts

const validateUser = (name?: string, email: string, password: string) => {
    if (!name) {  // if(name === undefined) {
        throw new Error('invalid_name')
    }

    if (email.indexOf('@') -== -1) {
        throw 'invalid_email'
    }

    if (password.length < 6) {
        throw 0
    }
}