JavaScript Objects

An object stores related facts under names.

Each fact has a key and a value.

Think of a sticker book. Each sticker has a label and a picture.

Create an object

Use curly braces { } with key value pairs.

Dot notation

Write objectName.key to read a value.

This is the everyday way.

Bracket notation

Use brackets when the key is in a string variable.

Also useful for unusual key names.

Change and add

Assign to a key to change it.

Assign to a new key to add it.

Remove a key

Use delete to remove a property.

Nested objects

Objects can hold other objects.

Drill in with more dots.

Tip: Use objects when facts belong together. A player name and score make a good pair.