jquery ajax get/post to a javascript file

Question

Ok, so the following is what I want to achieve:

I want to use jquery to load a file inside my javascript file. Normaly you can do a $.ajax request with a POST to a .php file. And select something in a database that looks like the POST I sended with. Now I want the same thing, but instead using a .php file, I will use a .js file.

This also works, the code loads the file with the text alert('Hello World!'); and shows the alert. All fine. But what I want when I load that .js file, it needs to send a value with it. So it could be alert(data); and it will say hello world. How can i achieve this without using cookies or something else that stores values.

You can't send data to a JS file as it has no method of retrieving it from the request. — Rory McCrossan, Sep 08 '16 at 14:43
Not really, no. You could set your server to process JS files, but this is equivalent to just making a request to a PHP page and arguably less secure. — Rory McCrossan, Sep 08 '16 at 14:46
And what if I request a php file, with javascript code in it. Could that create some problems when importing it using $.ajax? — UNTITLED.PNG, Sep 08 '16 at 14:51

score 1 · Answer 1 · edited May 23 '17 at 10:33

EDIT: this a GET request, a POST request is not allowed. Unless you're using GET variables to rewrite your javascript file before returning it you can't modify it or make it do anything other than what would happen if you just requested it with the <script> tag with the async attribute. /edit

Well I just learned something new. You can get a javascript file with an ajax call and execute it using eval but I'm almost 100% certain this is not how you should be doing whatever you're trying to do (also - when is JavaScript's eval() not evil)

$.ajax({
    url: '/path/to/script',
    type: 'GET',
    success: function (response) {
        eval(response.toString());
    };
});

You're calling the server, which then returns the javascript file and you're parsing it as javascript using eval. I never considered doing this but I supposed it's one way to load a javascript file on demand.

jquery ajax get/post to a javascript file

1 Answers1