Question

I would like to perform an MVC action only if the javascript is disabled.
To try to achieve this goal, I added a tag <noscript> in my html:

<noscript>
    @Html.Action("BlogRss", "Home")
</noscript>

In my controller, follow the action

public PartialViewResult BlogRss()
{
     return PartialView("_BlogRss", GetFeeds());
}

The problem is that the tag <noscript> does not affect the non-execution of the action.
The same is done with or without javascript enabled!

I know that everything inside the <noscript> will not be displayed if JavaScript is enabled.

Answer 1

<noscript> is a HTML tag, not a server tag, and will only function on the client side. The server will always render / execute any code you put between it – the client just won’t render / execute it.

There aren’t any nice ways of detecting whether a client has JavaScript enabled or not from the server side. The most realistic way would be to use javascript / AJAX to set a hidden value or cookie (document.cookie) and then use this value / cookie on the server side.

@if (!IsJavascriptEnabled) {
    <noscript>
        @Html.Action("BlogRss", "Home")
    </noscript>
}