In JavaScript, what’s the difference between
var x = Object();
and
var x = new Object();
?
In JavaScript, what’s the difference between var x = Object(); and var x =
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In JavaScript, what’s the difference between
var x = Object();
and
var x = new Object();
?
This is pulled directly from the ECMAScript specification:
15.2.1 The Object Constructor Called as a Function
When Object is called as a function rather than as a constructor, it performs a type conversion.
15.2.1.1 Object ( [ value ] )
When the Object function is called with no arguments or with one argument value, the following steps are
taken:
If value is null, undefined or not
supplied, create and return a new
Object object exactly as if the
standard built-in Object
constructor had been called with the
same arguments (15.2.2.1).
In Short:
new Object([ value ])Return ToObject(value).
Notes:
[ ] Is A common way to mark a parameter as optional.
ToObject Is a very simple operation that is defined in section 9.9.