javascript - 对象解构 ({ x, y, ...rest }) 用于将对象的属性列入白名单

Question

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Answer 1

为此，我使用了 2 个辅助函数

export const pickProps = (object, ...props) => (
  props.reduce((a, x) => {
    if (object.hasOwnProperty(x)) a[x] = object[x];
    return a;
  }, {})
);

export const omitProps = (object, ...props) => {
  const no = {...object};
  props.forEach(p => delete no[p]);
  return no;
};

你也可以这样做

const original = {
  a: 1,
  b: 2,
  c: 3,
  evil: "evil",
  ugly: "ugly",
};

const { a, b, c } = original;
const filtered = { a, b, c };