I couldn't find any information on "FC Vector Vector Vector PNG Vector Wallpaper HD". However, I can suggest some alternatives to achieve a similar effect.

One possible solution is to use the cssstyle package, which provides an implementation of the CSSStyleDeclaration class from the CSS Object Model specification. You can use it to manipulate the background image of an element.

Here's a brief snippet:

const cssStyle = require('cssstyle');

// Get the element with the background image
const element = document.getElementById('background-image');

// Create a new style object
const style = {
  'background-image': 'url(fc-vector-vector-vector-png-vector-wallpaper-hd.png)',
};

// Apply the style to the element
cssStyle(element, style);

This code assumes that you have an FC Vector Vector Vector PNG Vector Wallpaper HD image file that you want to use as the background image.

If you're looking for a more advanced solution, you might want to consider using a library like postcss-initial or @mermaid-js/mermaid-cli, which provide additional features for manipulating CSS styles.