Auto-reactions to messages in node.js, for discord bot

 /*
All credits to me, enjoy it!
by AroliS^
*/
You must know where to place this.

let emojis = [ '🤬', '🤣', '😎', '😑', '🖕', '😈', '🤝', '😱', '👀', '👨🏻‍💻', '🙏🏻', '👦🏼', '👂🏻', '👴🏽', '🕵🏽', '🙈', '🐭' ];
 if ( Math.floor( Math.random() * 10 ) == 1 ) message.react(emojis[ Math.floor( Math.random() * emojis.length ) ]);