isFile()

Function to check whether an object is a File object and whether the file exists on the file system.

Usage

To check whether a resource is a file object:

var file = new File("C:/myfile.txt");
if(isFile(file)) {
   //Do something is this is a file object
}

To check whether the resource is a file object and that the file exists on the file system:

var file = new File("C:/myfile.txt");
if(isFile(file, true)) {
   //Do something is this is a file object and if the file exists on the file system
}

Parameter	Data type	Required	Description
file	all	Yes	The object to check. You can parse any kind of object, string or variable to this function
mustexist	boolean	If set to `true` the function also checks that the file exists on the file system. Default is `false`

Value	Meaning
true	The specified object is a file object. When the parameter `mustexist` is set to `true`, this return value also means that the file exists on the file system
false	The specified object is not a file object. When the parameter `mustexist` is set to `true`, this return can also mean that the file does not exist on the file system even when the object is a file object