Assign value not reference in javascript [duplicate]

问题

This question already has answers here:

How do I correctly clone a JavaScript object? (68 answers)

Closed 3 years ago.

I am having a little problem assigning objects in javascript.

take a look at this sample code that reproduces my problem.

var fruit = {
   name: "Apple"
};

var vegetable = fruit;
vegetable.name = "potatoe";
console.log(fruit);

it logs

Object {name: "potatoe"}

How can I assign the value not the reference of an object to another object?

回答1:

You can use Object.assign:

var fruit = {
   name: "Apple"
};

var vegetable = Object.assign({}, fruit);
vegetable.name = "potatoe";
console.log(fruit);

来源：https://stackoverflow.com/questions/40133582/assign-value-not-reference-in-javascript