有人能帮我理解下面的代码吗?
const doit = ({
left: Left,
right: Right,
leftWeight = 1,
rightWeight = 1
}) => {
console.log(Left, Right, leftWeight, rightWeight);
};
doit({ left: '111', leftWeight: 2});
传递默认参数似乎有两种方式,并且以某种方式涉及到破坏赋值,但我如何分解才能理解它?
附录1
好吧,这似乎不是默认参数和箭头函数的问题,而是简单的对象破坏:
const { left: Left, right: Right, leftWeight = 1, rightWeight = 1 } = { left: "111", leftWeight: 2 };
console.log(Left, Right, leftWeight, rightWeight);
附录2
此代码给出了相同的结果:
const { Left, Right, leftWeight = 1, rightWeight = 1 } = { Left: "111", leftWeight: 2 };
console.log(Left, Right, leftWeight, rightWeight);
Object destructuring
显然可以选择重命名变量:
