How to fix "No 'Access-Control-Allow-Origin' header is present on the requested resource"?

Question

JavaScript

I'm including js in an html page but getting the error "No 'Access-Control-Allow-Origin' header is present on the requested resource."

Here is the code:

function Parse (params, method) {
     // Formating
    var access_token = '25a545548xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
    var v = 5.78
    var params = Object.extend({}, params, {
        access_token,
        v
    })
    var url = Format(params, method)


    // Send request
    $.ajax({
        url,
        dataType : "json",
        headers: {'Access-Control-Allow-Origin': '*'},
        success: function (data, textStatus) {
            console.log(data)
        }
    })
}

Answer 1

it will not be possible to make requests to the VK API directly from the page script. Headers are expected from their server, and of course no one in VK will register your server address as allowed.
Use their js sdk.