Front-end Object.assign() usage

Little scum · Posted on 6/4/2019 1:03:16 PM

The Object.assign() method is used to copy the values of all enumerable attributes from one or more source objects to the target object. It will return to the target object.

const target = { a: 1, b: 2 };
const source = { b: 4, c: 5 };

const returnedTarget = Object.assign(target, source);

console.log(target);
// expected output: Object { a: 1, b: 4, c: 5 }

console.log(returnedTarget);
// expected output: Object { a: 1, b: 4, c: 5 }

targetThe original object will be changed.
The first parameter of the Object.assign method is the target object, and the subsequent arguments are all source objects.

Note that if the target object has a property of the same name as the source object, or if multiple source objects have a property of the same name, the subsequent property overrides the previous property.

[JavaScript] Front-end Object.assign() usage

Related Posts

Sections viewed