Cross-origin request for local file

Question

I need to open a local html file in the browser. The javascript works fine but ajax stops working and XMLHttpRequest gives a cross origin error. Is there a way to run ajax f

Answer 1

If you are able to change the server code, you can try adding the string "null" to allowed origins. In Chrome, it sends the origin as "null" if it's running from a local file.

Here's an example in ASP.NET Core for setting up the "null" origin:

services.AddCors(options =>
{
    options.AddPolicy("InsecurePolicy",
        builder => builder
            .WithOrigins("null")
            .AllowAnyMethod()
            .AllowAnyHeader()
            .AllowCredentials());
});

Note that this is not recommended, but might be good enough if you just need it during development.