Object destructuring for function parameters

es5.js

function ajax(options) {

  options = Object.extend({
    "method": "POST",
    "error": function() {},
    "success": function() {},
    // ...
  }, options || {})

  try {
    return options.success(net(options.url, options.method))
  } catch (err) {
    return options.error(err)
  }

}

es6.js

function ajax({
  "url": url, 
  "method": method = "POST",
  "error": error = function() {},
  "success": success = function() {}
}) {

  try {
    return success(net(url, method))
  } catch (err) {
    return error(err)
  }

}

use.js

ajax({ "url": urlToService, "method": "GET" })

function ajax(options) {
    options = options || {};
    var url = options.url;
    var method = options.method || 'POST';
    var error = options.error || function() {};
    var success = options.success || function() {};

    try {
        return success(net(url, method));
    } catch (err) {
        return error(err);
    }
}