JS: How to send a message to VK?

Question

JavaScript

Hey!
I need to send a message to a VK user on behalf of the community. Found different implementations, but gives an error:

Failed to load https://api.vk.com/method/messages.send: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin ' XXXX.ru ' is therefore not allowed access. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

let token = 'XXXX';
        let user_id = 99999;
        let message = 'msg';
        let apiMsg = 'https://api.vk.com/method/messages.send';

        let header = new Headers({
            'Access-Control-Allow-Origin':'*',
            'Content-Type': 'multipart/form-data'
        })

        let data = {
            'user_id': user_id,
            'message': message,
            'access_token': token
        };

        let options = {
            mode: 'cors',
            header: header,
            'method': 'post',
            'payload': data
        };

        fetch(apiMsg, options)
            .then((data) => {
                return data.text()
            })
            .then((text) => {
                console.log(text)
            })
            .catch((error) => {
                console.log('There has been a problem with your fetch operation: ' + error.message)
            })

Why does the error occur, I finished off Access-Control-Allow-Origin? How right?

Answer 1

'Access-Control-Allow-Origin':'*',

as far as I understand, this header should be registered on the server, and not sent in the request, that is, you do not need to use cors, as indicated in the error