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JavaScript Object-Oriented JavaScript Object Basics Changing and Adding Properties

Posted by Trenton Feda
Trenton Feda
26,900 Points

How does this work if ernie is labeled const? Wouldn't that make the object immutable?

How does this work if ernie is labeled const? Wouldn't that make the object immutable?

1 Answer

Jennifer Nordell
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STAFF
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Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there, Trenton! First, kudos on picking up on the const! But this makes the object immutable. The properties inside them are specific to that object. She touches on this in the first video around 0:38.

Properties are like object specific variables that store information.

You can change the values of the properties, but you cannot overwrite the entire object. For instance you couldn't later do this:

ernie = [1, 2, 3];

It won't allow for you to change the object itself, but the properties inside them (and even the methods) are like variables that are specific to that object.

Hope this helps! :sparkles:

Trenton Feda
Trenton Feda
26,900 Points

Thanks for the explanation!