我如何将一个对象的属性值分配给另一个对象？

Question

I have two objects like:

var a = { a1: 'a1', a2: 'a2', a3: {}}
var b = { a1: 'b1', a2: 'b2', a3: {}}

How i can assign values to the properties of one object to another?

If i try use a=b As I get an object a link to b. I just want to equate the value of the properties.

Answer 1

Use Object.assign() .

Object.assign(b, a); // Assign all properties of a to b. Changing b in the process.

Be advised: Object.assign() it relatively new, and is not supported in Internet Explorer as of yet.

A polyfill for it is available here .

Answer 2

There are lot's of way to clone an object.

The two elegant (may not be the most efficient) ways are:

Without JQUERY - Using the serialize\\deserialize way

var obj = { a1: 'a1', a2: 'a2', a3: {}}
var cloned = JSON.parse(JSON.stringify(obj));

With JQUERY - Using $.extend :

var obj = { a1: 'a1', a2: 'a2', a3: {}}
var cloned = $.extend({}, obj);