如何将对象作为参数散布到函数中? [英] how to spread an object to a function as arguments?

查看：29 发布时间：2021/5/19 19:58:10 javascript

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我有一个对象和一个接受参数的函数，我想扩展对象，以便每个属性都是该函数中的一个参数.

I have an object an a function which accept arguments, I would like to spread the objects so each property is an argument in that function.

我的代码在做什么错了?

What am I doing wrong in my code?

const args = {
    a: 1
    b: 2
}

const fn = (a, b) => a + b

// i am trying with no success
console.log(fn(...args))

您可以使用ES6

You can use ES6 object destructuring on passed parameter and then just pass your object.

const args = {a: 1, b: 2}

const fn = ({a, b}) => a + b
console.log(fn(args))

您还可以为这些属性设置默认值.

You can also set default values for those properties.

const args = {b: 2}

const fn = ({a = 0, b = 0}) => a + b
console.log(fn(args))

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