您的构造函数需要一个对象作为其参数.因此，要构造MyClass的对象，您需要执行以下操作:

Your constructor requires an object as its argument. So to construct an object of MyClass, you'll need to do something like:

let obj = new MyClass({}) // construct with an empty object as the arg
// or:
let argObj = {a: 123}
let obj = new MyClass(argObj)