Are there any benefits to using bracket syntax over dot syntax?
Sure there is :
object["foo.bar"] // refers to foo.bar property of object
object.foo.bar // refers to bar property of foo which is a property of object
To resolve such properties of any object with .
you need to use the square bracket notation , because dot notation will interpret it otherwise.
Another difference will be the look-up time . If you use the dot syntax, the compiler will know at compile time that you are accessing a property of that object. If you use the bracket syntax, the actual lookup of the property is done at runtime. Hence :
object[someKey] // the runtime value of someKey will be used to get a property
object.someKey // resolves to someKey property of an object.
Lastly , dot notation is faster than bracket notation.