Object, Property, Method

Question 1

What is an object?

Answer 1

An object is a thing or entity in a programming context. Examples include the browser window, a submit button, or a web page document.

Question 2

Give an example of objects in a web context.

Answer 2

Examples of objects in a web context include the browser window, the submit button on a form, and the entire web page document.

Question 3

What is a property in programming?

Answer 3

A property is a characteristic or attribute of an object. For example, the background color of a web page (document.bgcolor) or the file last modified date (document.lastmodified).

Question 4

Can you give an example of a property and how it is used?

Answer 4

An example of a property is img.src, which specifies the source file of an image object. You can both read or set the value of this property.

Question 5

What is a method in programming?

Answer 5

A method is an action or function that an object can perform. It is like a verb that executes a specific action, such as writing text to a document (document.write()) or submitting a form (form.submit()).

Question 6

Give an example of a method and what it does.

Answer 6

The method document.write() writes text to a web page document, and form.submit() submits a form.

Question 7

What can you do with properties in JavaScript?

Answer 7

You can either read the value of a property (get its current state) or set a new value for the property (modify it).