javascript - 嵌套对象中的 ES6 默认参数

Question

我希望在嵌套对象中有一个带有默认参数的函数，并且我希望能够调用它 f() 或仅指定单个参数。

// A function with nested objects with default parameters:

function f({ a = 1, callback = ({ name, param } = { name: "qwe", param: 123 }) } = {}) {
    console.log("a:", a);
    console.log("callback:", callback);
}

// And I want to run it like this:

f();
f({ callback: { params: "456" } });

// But 'callback.name' becomes undefined.

Answer 1

当解构与默认参数混合时，我承认代码很难读写(尤其是当有嵌套对象时......)。

但我认为您正在尝试这样做:

function f({callback: {name = "cbFunction", params = "123"} = {}} = {}) {
  console.log(name);
  console.log(params);
}

f();
f({callback: {params: '789'}});