Dynamic Access

To access a field, a property, or a method, we use the dot notation in JavaScript much like in languages like Java, C#, and many other languages. However, we can also access a member of an instance using the [] operator; we’ll look at yet another alternative to this in Getting and Setting Properties.

Accessing instance members

Following are the rules to access instance members:

• Use the dot notation, like sam.age or sam.play(), if you know the member name at code writing time.
• If the

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