javascript date format dd-mmm-yyyy

let today = new Date()
today.toISOString().split('T')[0]var date_format = new Date();

document.write(innerHTML = date_format.getMonth()+'/'+ date_format.getDate()+'/'+date_format.getFullYear());var date_format = new Date();
    document.write(innerHTML = date_format.getMonth()+'-'+ date_format.getDate()+'-'+date_format.getFullYear());