Testing object for properties [Solved]

In your code, myObj.checkProp (dot notation) looks for a property in your object that’s literally named checkProp. It fails because myObj has no checkProp property, only gift, pet, and bed.

When you use myObj[checkProp] (bracket notation), checkProp is substituted with the value contained in the variable checkProp, so it is evaluated to, say, myObj['gift'], or myObj['pet'].

In short, dot notation is useful when you know the name of the property you want to access, and bracket notation for dynamically accessing a property of an object.

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