What is the difference? 1 works 2 doesn't!

[kevcomedia]

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 dyna…