Facebook's console warning

console.js

const fontMerah = 'font-size:50px; font-weight:bold; color:red; -webkit-text-stroke:1px black;';
const fontBiasa = 'font-family:helvetica; font-size:20px;'

console.log('%cStop!', fontMerah);
console.log('%cThis is a browser feature intended for developers. If someone told you to copy and paste something here to enable a Facebook feature or "hack" someone\'s account, it is a scam and will give them access to your Facebook account.', fontBiasa);
console.log('%cSee https://www.facebook.com/selfxss for more information.', fontBiasa);