Help with server-script URL Decoding

[insalman360]

I’m trying to decode URL both with query parameters and without query parameters. I’m using the Toolbox plugin to run js at the server side using the “server-script” element. I’m using the below code to decode URLs using js:

function extractAndCleanURL(input) {
  const match = input.match(/(?<=\burl=)[^&]+/);

  if (match) {
    const encodedURL = match[0];

    // Decode once or twice (some URLs are double encoded)
    let decodedURL = decodeURIComponent(encodedURL);
    try {
      decodedURL = decodeURIComponent(decodedURL);
    } catch (e) {
      // If not double encoded, it's fine
    }

    const cleanURL = decodedURL
      .replace(/([&?]form=[^&]*)(&|$)/, '') 
      .replace(/[&?]$/, '');    

    return cleanURL;
  }

  return null;
}

const input = 'data';  // data is the toolbox parameter for input values

const result = extractAndCleanURL(input);
console.log(result);

I can’t seem to get it to work in the plugin. The workflow process goes as follows shown in images

What am I doing wrong here? and how do I solve this?