@babel/plugin-transform-object-super

    1. var _obj;
    3. var _get = function get(object, property, receiver) {
    4.   if (object === null) object = Function.prototype;
    5.   var desc = Object.getOwnPropertyDescriptor(object, property);
    6.   if (desc === undefined) {
    7.     var parent = Object.getPrototypeOf(object);
    8.     if (parent === null) {
    9.       return undefined;
    10.     } else {
    11.     }
    12.   } else if ("value" in desc) {
    13.     return desc.value;
    15.     var getter = desc.get;
    16.     if (getter === undefined) {
    17.       return undefined;
    18.     }
    19.     return getter.call(receiver);
    20.   }
    21. };
    23. var obj = {
    24.   say: function say() {
    25.     return "Hello";
    26.   },
    29.   say: function say() {
    30.     return (
    31.       _get(_obj.__proto__ || Object.getPrototypeOf(_obj), "say", this).call(
    32.         this
    33.       ) + "World!"
    34.     );
    35.   },
    36. });
    1. {
    2.   "plugins": ["@babel/plugin-transform-object-super"]
    3. }
    1. require("@babel/core").transformSync("code", {
    2.   plugins: ["@babel/plugin-transform-object-super"],
    3. });