Is it possible to change nested object properties with this syntax

Question

Say you have this object:

myObj = { foo: { bar : 123, baz: 456 } };

To edit the value of bar you can do this:

myObj['foo']['bar'] = 789

But what if you have a method somewhere that changes specific object properties like this:

myObj[key] = value

If you need to use that and you want to edit bar in the myObj object, is it possible with that code?

I tried:

myObj["foo"."bar"] = 789;
myObj["foo"["bar"]] = 789;

But it doesn't work. Is it possible at all to do?

score 0 · Answer 1 · answered Jul 19 '17 at 10:25

0

Pure JavaScript doesn't allow you to access nested properties with a simple string.

An alterative can be i.e. lodash:

_.get(myObj, 'foo.bar'); // 123

_.set(myObj, 'foo.bar', 789);

answered Jul 19 '17 at 10:25

hsz

If `_` can do it, there's also a "pure Javascript" way to do it (albeit using more code)… – deceze Jul 19 '17 at 10:25
@deceze I assue we're talking about the simplest solutions here. – hsz Jul 19 '17 at 10:26
Including an additional library is not necessarily the simplest solution… – deceze Jul 19 '17 at 10:27
Thanks Hsz, but indeed I was hoping for a pure Javascript way, lodash isn't an option in the project unfortunately. – Sometip Jul 19 '17 at 11:24

1 Answers1