What is the difference between new Object and new Object() in JavaScript [duplicate]

Answer 1

Easy answer - don't use that syntax. The preferred way for creating objects in JavaScript is to use the following syntax:

var myObject = {}; // creates an empty object

Answer 2

There's no difference. Parentheses are optional when using a function as a constructor (i.e. with the new operator) and no parameters. When not using the new operator, parentheses are always required when calling a function.

As noted in another answer, it's generally preferable to use an object literal instead. It has the following advantages over using the Object constructor:

• Allows concise initialization of properties (e.g. var foo = { bar: "cheese" };)
• Shorter
• Possibly faster
• Unaffected in the (unlikely) event of the Object function being overwritten.

Answer 3

There is no difference. It just happens that in this special case, you can omit the ().

So new Object()

and

new Object

are equivalent.

BTW, there is also no difference in using new Object() over {}. Use whatever you prefer.