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Is it possible to add multiple properties at once without overwriting the properties which are already inside object?

object = {prop1: "1", prop1: "2", prop3: "3"};
//Want to add: {prop4: "4", prop5: "5", prop6: "6"}

Is there any way to do this without iterating over the properties I want to add and adding one by one?

marc_s
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juniorjunior
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  • https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign –  Oct 02 '18 at 11:30

1 Answers1

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Use Object assign

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

object = {prop1: "1", prop1: "2", prop3: "3"};
//Want to add: {prop4: "4", prop5: "5", prop6: "6"} 

Object.assign(object, {prop4: "4", prop5: "5", prop6: "6"})
console.log(object)
Ashish Ranjan
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  • Great! Is it going to respect the order, won't add new properties before the ones that already exist inside object? – juniorjunior Oct 02 '18 at 11:33
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    @juniorjunior: I didn't quite follow you, but if you meant that it won't overwrite any existing properties if they already exist, then sorry it will. And that's what a looped code will do too. – Ashish Ranjan Oct 02 '18 at 11:36