No step on CSS

nosteponcss.js

// ==UserScript==
// @name        RedaddCSS
// @namespace   com.digitalfishfun.nosteponcss
// @version     1
// @description Allows subreddits to add CSS through an unofficial method.
// @grant       none
// @include     https://reddit.com/r/*
// ==/UserScript==

const nosteponcss_instructions = `
USAGE: 
To use this script, the subreddit you are on MUST have a wiki paged named "css" in the root. 

The page MUST begin with
/* @CSS */

and the rest of the page being the CSS you wish to inject.`;


console.log('RedaddCSS loading...');

let nosteponcss_css;
let nosteponcss_subreddit = window.location.pathname.split('/')[2];

let nosteponcss_main = () => {
  console.log('Checking https://www.reddit.com/r/' + nosteponcss_subreddit + '/wiki/css.json for custom CSS');
  $.get('https://www.reddit.com/r/' + nosteponcss_subreddit + '/wiki/css.json', data => {
    let nosteponcss_css = data.data.content_md.replace(/\r/g, '').replace(/ /g, '');
    if (nosteponcss_css.split('\n') [0] != '/*@CSS*/') return console.log('CSS is not in valid format :/');
    console.log('CSS loaded!');
    $('head').append('<style id="nosteponcss_style">' + nosteponcss_css + '</style>');
    console.log('Done injecting custom CSS!');
    console.log('Checking for RES');
    if ($("#res-style-checkbox").prop("checked") != undefined) {
      console.log('RES Detected, loading listener for CSS toggle.');
      if (!$("#res-style-checkbox").prop("checked")) {
        $("#nosteponcss_style").remove();
        console.log("CSS is disabled, removing.");
      }
      $("#res-style-checkbox").change(() => {
        if ($("#res-style-checkbox").prop("checked")) {
          $('head').append('<style id="nosteponcss_style">' + nosteponcss_css + '</style>');
          return console.log("Enabled CSS");
        }
        $("#nosteponcss_style").remove();
        return console.log("Disabled CSS");
      })
    }
  });
}

nosteponcss_main();