AJAX code do not run locally

问题:

Code to read subfolders is given below

function countFolder(){
    var dir='albums';
    var count=0;
    alert(dir);
    $.ajax({
        url: dir,
        async:false,
        success: function (data) {
            $(data).find("a:contains(" + 'album' + ")").each(function () {// function to read foldera name contains 'album'
                count++;
                //alert(url);
            });
        }
    });
    return count;
}

This code runs perfectly when I use it on localhost. But it does not run when run locally(i.e. from file location) . I have 12 sub-folders. So when I use localhost I get the output of 12, however when run locally I only get the output of 0.

What would be the problem? Please help me.. I am new with jQuery. So if it is my mistake please notify it. In code I only use html, jQuery, js, but not php.

回答1:

This is because of Browsers cross-domain policy. You can't send ajax request outside the domain from which the request have been send. So basically, you can't use ajax locally at all.

回答2:

Ajax makes a call to the server. When you open from localhost, the page opens with help of a server (xampp or tomcat). But when you open the page from the file location, it just displays the static content, only html and js, but not any server side code. Even php code will not work if you open from file location