get()

in src/browser-polyfill.js [238:295]

• 22 lines of code
• 10 McCabe index (conditional complexity)

        get(proxyTarget, prop, receiver) {
          if (prop in cache) {
            return cache[prop];
          }

          if (!(prop in target)) {
            return undefined;
          }

          let value = target[prop];

          if (typeof value === "function") {
            // This is a method on the underlying object. Check if we need to do
            // any wrapping.

            if (typeof wrappers[prop] === "function") {
              // We have a special-case wrapper for this method.
              value = wrapMethod(target, target[prop], wrappers[prop]);
            } else if (hasOwnProperty(metadata, prop)) {
              // This is an async method that we have metadata for. Create a
              // Promise wrapper for it.
              let wrapper = wrapAsyncFunction(prop, metadata[prop]);
              value = wrapMethod(target, target[prop], wrapper);
            } else {
              // This is a method that we don't know or care about. Return the
              // original method, bound to the underlying object.
              value = value.bind(target);
            }
          } else if (typeof value === "object" && value !== null &&
                     (hasOwnProperty(wrappers, prop) ||
                      hasOwnProperty(metadata, prop))) {
            // This is an object that we need to do some wrapping for the children
            // of. Create a sub-object wrapper for it with the appropriate child
            // metadata.
            value = wrapObject(value, wrappers[prop], metadata[prop]);
          } else if (hasOwnProperty(metadata, "*")) {
            // Wrap all properties in * namespace.
            value = wrapObject(value, wrappers[prop], metadata["*"]);
          } else {
            // We don't need to do any wrapping for this property,
            // so just forward all access to the underlying object.
            Object.defineProperty(cache, prop, {
              configurable: true,
              enumerable: true,
              get() {
                return target[prop];
              },
              set(value) {
                target[prop] = value;
              },
            });

            return value;
          }

          cache[prop] = value;
          return value;
        },