some progress

node_modules/whatwg-url/lib/Function.js

@@ -0,0 +1,42 @@
+"use strict";
+
+const conversions = require("webidl-conversions");
+const utils = require("./utils.js");
+
+exports.convert = (globalObject, value, { context = "The provided value" } = {}) => {
+  if (typeof value !== "function") {
+    throw new globalObject.TypeError(context + " is not a function");
+  }
+
+  function invokeTheCallbackFunction(...args) {
+    const thisArg = utils.tryWrapperForImpl(this);
+    let callResult;
+
+    for (let i = 0; i < args.length; i++) {
+      args[i] = utils.tryWrapperForImpl(args[i]);
+    }
+
+    callResult = Reflect.apply(value, thisArg, args);
+
+    callResult = conversions["any"](callResult, { context: context, globals: globalObject });
+
+    return callResult;
+  }
+
+  invokeTheCallbackFunction.construct = (...args) => {
+    for (let i = 0; i < args.length; i++) {
+      args[i] = utils.tryWrapperForImpl(args[i]);
+    }
+
+    let callResult = Reflect.construct(value, args);
+
+    callResult = conversions["any"](callResult, { context: context, globals: globalObject });
+
+    return callResult;
+  };
+
+  invokeTheCallbackFunction[utils.wrapperSymbol] = value;
+  invokeTheCallbackFunction.objectReference = value;
+
+  return invokeTheCallbackFunction;
+};