Can I include JavaScript in an AJAX response and run it, or should I only use JSON or plain HTML for a more elegant solution? I'm trying to figure out the best way to handle AJAX requests that involve inserting HTML or running JavaScript based on user data.
Appreciate any insights. Thanks!
It seems that the JavaScript function to be executed after an AJAX response should be consistent for everyone, with the exception of a variable. In this case, it would be best to include the JavaScript function in your scripts file that is loaded normally, and have the AJAX response return the necessary variable (such as the user ID) to call the function as needed instead of injecting a new function each time.
If the AJAX response returns HTML, you can directly insert it into the DOM on a successful request.
I suggest always returning JSON even if the response is HTML. The JSON response could look like this:
{"responseType":"HTML", "varID":null, "payload":"<div>some html</div>"}If the response is type JS, then the varID could have the variable and the payload could be null. This is just one example, but you could implement something similar to standardize the response while handling both scenarios.
It is perfectly fine to do that. With jQuery's $.getScript method, it fetches the file through ajax and then runs the script without needing to add any script tags.
Running javascript that is received through an ajax call can pose a security risk, as it may open the door to XSS attacks (eval function is known to be dangerous).
It is recommended to have AJAX responses returned in JSON format, allowing client-side scripting to interact with the data securely.
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