ネイティブ JavaScript を使用して Ajax リクエスト データを送信する手順

const xhr = new XMLHttpRequest();

xhr.open('PUT','http://118.24.84.199:8080/sm/accept/list',false);

xhr.setRequestHeader('token','515b8c62-ddf4-41ef-a7c8-93957e1c589e');
xhr.setRequestHeader('Accept','application/json');
xhr.setRequestHeader('Content-Type','application/json');

let data = {
                page:1,
                pageSize:10,
            };
data = JSON.stringify(data);
xhr.send(data);

console.log(xhr.response);

xhr.onreadystatechange = function(event){
    if (xhr.readyState == 4){
        if ((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304){
            console.log(JSON.parse(xhr.response));
        } else {
            console.log("Request was unsuccessful: " + xhr.status);
        }
    }
};