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JavaScript - access object property within the object
1 answers
0 points
How can I access the property of object within object?
I have the following object:
xxxxxxxxxx1
var user = {2
id: 1,3
username: 'Mark',4
country: 'USA',5
place_of_residence: country,6
};I wanted to set place_of_residence to country value but it didn't work. I also tried using this.country unsuccessfully.
1 answer
0 points
1. Using getter (ES6+)
Since ES6 you can use get syntax to bind object property to a function that will be called when you try to access the property.
xxxxxxxxxx1
var user = {2
id: 1,3
username: 'Mark',4
country: 'USA',5
get place_of_residence() {6
return user.country;7
},8
};9
10
console.log(user['place_of_residence']); // USA2. Alternative solution
You can refer to the object property after the object is created.
xxxxxxxxxx1
var user = {2
id: 1,3
username: 'Mark',4
country: 'USA',5
};6
7
user['place_of_residence'] = user['country'];8
9
console.log(JSON.stringify(user, null, 4));Note:
In both cases you can alternativelu use dot property accessor like:
user.place_of_residence = user.country
References
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