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In this video, you'll be learning
about changing properties and

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adding them to object literals.

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Everything you're learning in this
stage of the course is to get you

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really comfortable with the basics
of objects and object syntax.

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Object literals are just one
way to create objects, but

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they're a great way to learn the basics.

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So that you're ready to hit the ground
running with more advanced object

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discussions later on in this course.

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Remember, object oriented programming
is about designing programs that use

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objects for
the primary logic of the program.

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To do that, you need to have
a good grasp of the syntax for

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how we create and interact with objects.

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Now that we know how to access properties
using dot and bracket notation,

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we can build on that knowledge to
change or manipulate properties.

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We can also use this knowledge to add
new properties to object literals.

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We're going to keep working with the ernie
object literal from the previous two

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videos.

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Ernie is a year old right now,
but time will go on, and

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he will eventually get older.

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When he turns two,
we'll need to update his age property.

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Remember when I referred to properties
as object specific variables?

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Well, just like we would update a regular
variable, we can update a property.

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You can use either dot or

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bracket notation to access the property,
then simply set it equal to the new value.

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For dot notation,
that means ernie.age = 2.

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To change the age property
using bracket notation,

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you'll do ernie['age'] = 2.

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Interestingly, for
both dot and bracket notation,

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you would use the same syntax to add
a property to an object literal.

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For example, Ernie doesn't
currently have a color property.

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If we wanted to give him one,

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we would simply do ernie.color = 'black'.

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Let's check what's going on inside our
object literal by logging the value of

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ernie to the console and
then running our file.

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I'm gonna save it and
then go back down here and run the file.

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Perfect, as we can see
down in the console,

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Ernie now has a new property called color,
great job.

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In this stage of the course,

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you learned all about working
with the object literals.

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You mastered dot and bracket notation, and

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you learned how to add properties
to object literals as well.

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Check out the teacher's notes to find
some additional opportunities for

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practicing these concepts.

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And then join me in the next stage to
continue your object oriented journey.