DC randomizer for Foundry VTT

DC_randomizer.txt

function postToChat(num, label){
  var plusOrMinus = Math.random() < 0.5 ? -1 : 1;
  console.log(plusOrMinus)
  let DC = num+plusOrMinus*(Math.floor(Math.random()*4));
  console.log(DC)
  let chatData = {
    user: game.user._id,
    speaker: {alias: "DC"},
    content: `The ${label} DC is: <b>${DC}<b>`,
    whisper : ChatMessage.getWhisperRecipients("USERNAME_OF_GM")
  };
    ChatMessage.create(chatData, {});
  };



let d = new Dialog({ //dialog object creates the window with all the buttons
title: "Difficulty Class",
content: `<h2>Choose a difficulty.<h2>`,
buttons: {
one: {
 label: "Trivial",
 callback: () => {postToChat(5,"Trivial")}
},
two: {
 label: "Easy",
 callback: () => {postToChat(10,"Easy")}
},
three: {
 label: "Moderate",
 callback: () => {postToChat(15,"Moderate")}
},
four: {
 label: "Hard",
 callback: () => {postToChat(20,"Hard")}
},
five: {
 label: "Very Hard",
 callback: () => {postToChat(25,"Very Hard")}
},
six: {
 label: "Nearly Impossible",
 callback: () => {postToChat(30,"Nearly Impossible")}
}
},
default: "one",
render: html => console.log("Register interactivity in the rendered dialog"),
close: html => console.log("This always is logged no matter which option is chosen")
});

d.render(true);