The initial value of Object.prototype.constructor is the standard built-in Object constructor.
Determines whether an object has a property with the specified name.
A property name.
boolean
Determines whether an object exists in another object's prototype chain.
Another object whose prototype chain is to be checked.
boolean
Determines whether a specified property is enumerable.
A property name.
boolean
Returns a date converted to a string using the current locale.
string
Returns a string representation of an object.
string
Returns the primitive value of the specified object.
Object