Escaping JavaScript string literals in views

Question

Is there a utility function for escaping JavaScript in ASP.NET MVC views? I often need to init a little snippet of JavaScript using some values from the view; for instance I

Answer 1

In my case I needed a string not a json object and this is for Asp.Net Core:

@functions{
    public Microsoft.AspNetCore.Html.IHtmlContent ToJS(string value)
    {
        return Html.Raw("'" + value.Replace("'", "\\'").Replace("\r", "\\r").Replace("\n", "\\n") + "'");
    }

    public Microsoft.AspNetCore.Html.IHtmlContent ToJS(int value)
    {
        return Html.Raw("" + value);
    }
}

This will escape the ' and end of line characters. Also it leaves numbers (int) as a number. This could be overloaded to include float, decimal, etc. as needed.

So, I don't have to think about it or do anything different for each type:

var serverName = @ToJS(m.ServerName);
var appSiteUrl = @ToJS(m.SiteUrl);
var facebookId = @ToJS(m.FacebookAppId);