// Example:
// Script Operator
// 1. backend version(>2.14.88):
$server.name = 'prefix-' + $server.name
$server.ecn = true
$server['test-url'] = 'http://1.0.0.1/generate_204'
// 2. operator function
function operator(proxies, targetPlatform, context) {
  return proxies.map( proxy => {
    // Change proxy information here

    return proxy;
  });
}

// Script Filter
// 1. backend version(>2.14.119):
const port = Number($server.port)
return [80].includes(port)

// 2. filter function
function filter(proxies, targetPlatform) {
  return proxies.map( proxy => {
    // Return true if the current proxy is selected

    return true;
  });
}