How do I check if file exists in jQuery or pure JavaScript?

Question

How do I check if a file on my server exists in jQuery or pure JavaScript?

Answer 1

I use this script to check if a file exists (also it handles the cross origin issue):

$.ajax(url, {
       method: 'GET',
       dataType: 'jsonp'
         })
   .done(function(response) { 
        // exists code 
    }).fail(function(response) { 
        // doesnt exist
    })

Note that the following syntax error is thrown when the file being checked doesn't contain JSON.

Uncaught SyntaxError: Unexpected token <