Folder check in javascript

Question

Hi,

How to check whether a folder exists or not using Javascript?

Thanks, Karthick

Answer 1

If this is Javascript running within a web browser, you can't. For (extremely valid) security reasons, Javascript in a web page does not have access to the client filesystem.

If for some reason you wanted to check from a web page whether a folder existed on the server, you could make an Ajax call from Javascript to a server method (e.g. Java, PHP, ASP.NET, etc.) that could (depending on permissions) have access to the server filesystem.

If you are using Javascript as a Windows scripting environment, Microsoft provides a FileSystemObject that includes a FolderExists() method.

Answer 2

If you mean a folder on your server, you can make an ajax request to it and check the status code:

var req = new XMLHttpRequest();

req.onreadystatechange = function(){

    if (req.readyState < 4) return;

    if (req.status === 200) alert("The folder exists!");
    else alert("The folder does not exist or can not be accessed!");

}

req.open("GET", "/path/to/folder", true);
req.send("");