const style = document.createElement('style');

It looks like you're starting to create a <style> element in JavaScript. To complete this, you may want to add some CSS rules to it and then append it to the document. Here’s a simple example of how to do that:

JavaScript
1const style = document.createElement('style');
2style.type = 'text/css';
3style.innerHTML = `
4  body {
5    background-color: lightblue;
6  }
7
8  h1 {
9    color: navy;
10    font-family: Arial, sans-serif;
11  }
12`;
13
14// Append the style element to the head of the document
15document.head.appendChild(style);

In this example, we're setting the background color of the body to light blue and styling <h1> elements with navy text and a specific font family. You can customize the CSS rules within the innerHTML to suit your needs.