- What is the difference between DOM and BOM?
- Can a private class be extended?
- What is a private method?
- What is difference between protected and private?
- What is closure give an example?
- Which method can access private attributes of a class?
- What are the advantages and disadvantages of using use strict?
- Can I use private fields?
But using call or apply isn’t as convenient as invoking a private method directly on an object, nor does it allow for chaining multiple methods together..
What is the difference between DOM and BOM?
Can a private class be extended?
The answer is you can’t extend the Parent class if it has a private default constructor. You have to make the constructor available to the subclass. In this case you need to have a default constructor that have a protected or public or default access modifier.
What is a private method?
A private method is a method which can’t be accessed by any other object outside the scope it is introduced. Even instances of inherited classes cannot access these methods. The idea with the private modifier is mainly to hide data from the user of the class and also is a way to reduce mutation from the outside.
What is difference between protected and private?
The class members declared as private can be accessed only by the functions inside the class. … The class member declared as Protected are inaccessible outside the class but they can be accessed by any subclass(derived class) of that class.
What is closure give an example?
Closure means that an inner function always has access to the vars and parameters of its outer function, even after the outer function has returned. … Inner function can access variables and parameters of an outer function (however, cannot access arguments object of outer function). Consider the following example.
Which method can access private attributes of a class?
Answer: Methods, Variables and Constructors that are declared private can only be accessed within the declared class itself. Private access modifier is more secure and restrictive access level, whereas class and interfaces cannot be private.
A private function can only be used inside of it’s parent function or module. A public function can be used inside or outside of it. Public functions can call private functions inside them, however, since they typically share the same scope.
What are the advantages and disadvantages of using use strict?
what are the advantages and disadvantages to using it? If you put “use strict”; at the top of your code (or function), then the JS is evaluated in strict mode. Strict mode throws more errors and disables some features in an effort to make your code more robust, readable, and accurate.
Can I use private fields?
Private fields are accessible on the class constructor from inside the class declaration itself. The limitation of static variables being called by only static methods still holds. … Only the class which defines the private static field can access the field. This can lead to unexpected behaviour when using this .